NATURAL GAS AND PROPANE
INSTALLATION CODE
              CSA-B149.1:25

CSA B149.1:25
NATURAL  GAS AND PROPANE
INSTALLATION CODE


2026          Saskatchewan Interpretations

                          Eﬀective April 1, 2026
TSASK CSA B149.1:25 Interpretations
Compliance is mandatory. This document addresses circumstances where inconsistent
interpretation has been identiﬁed throughout industry and addresses past failures.

Contents
4 General ..................................................................................................................... 1
   4.3 Responsibilities of the installer........................................................................... 1
      4.3.9 Activation data ............................................................................................. 1
      4.3.10 Activations ................................................................................................. 1
      4.3.11 Test ﬁring ................................................................................................... 2
   4.5 Suitability of Use ................................................................................................ 2
      4.5.5.1 Other damages .......................................................................................... 2
   4.9 Hazardous locations ........................................................................................... 2
      4.9.3 Dugouts and partial basements .................................................................... 2
   4.11 Isolation of safety devices ................................................................................ 3
      4.11.1 Car sealed .................................................................................................. 3
      4.11.2 Pressure relief path ..................................................................................... 3
   4.14 Accessibility ..................................................................................................... 4
      4.14.8 Acceptable design methods ........................................................................ 4
6 Gas piping systems ................................................................................................... 5
   6.2.23 CSST prohibition ........................................................................................... 5
      6.2.23.1 Prohibited connection to a swing.............................................................. 5
   6.7 Location ............................................................................................................. 6
      6.7.7 Aggressive environments .............................................................................. 6
   6.8 Piping practices.................................................................................................. 6
      6.8.8 Supply header exceeds NPS 2-1/2 ................................................................. 6
   6.11 Appliance connections ..................................................................................... 6
      6.11.1.1 Rigid cabinet penetration ......................................................................... 6
      6.11.1.2 Flexible cabinet penetration ..................................................................... 7
   6.11.7 Appliance connections ................................................................................ 7
6.15 Underground piping and tubing ......................................................................... 8
   6.15.2.1 PE pipe connection .................................................................................. 8
   6.15.2.2 Steel connection ...................................................................................... 8
   6.15.3.1 Type L tubing connection ......................................................................... 8
   6.15.3.2 Copper tubing connection ........................................................................ 9
   6.15.4.1 Rocky terrain ............................................................................................ 9
   6.15.8.1 Swing ...................................................................................................... 9
   6.15.10.1 Grade point sleeve ............................................................................... 10
   6.15.14.1 Tracer wire ........................................................................................... 10
   6.15.16 Liquid propane ........................................................................................ 11
   6.15.17 Landslide areas ...................................................................................... 11
6.17 Identiﬁcation of piping or tubing ..................................................................... 13
   6.17.1.1 Liquid propane ....................................................................................... 13
   6.17.4.1 Permanent identiﬁcation methods .......................................................... 13
   6.17.4.2 Fastening tags ....................................................................................... 13
   6.17.4.3 Prohibited methods................................................................................ 13
6.20 Gas hose and ﬁttings ...................................................................................... 14
   6.20.3 Installation ............................................................................................... 14
6.21 Gas connectors .............................................................................................. 14
   6.21.3 Corrugated metal gas connector ............................................................... 14
6.22 Testing of piping, tubing, hose and ﬁttings ..................................................... 15
   6.22.1.1 Notiﬁcation ............................................................................................ 15
   6.22.2.1 Low pressure testing .............................................................................. 15
   6.22.2.2 High pressure testing ............................................................................. 15
   6.22.2.3 Isolation ................................................................................................ 16
   6.22.7 Dormant piping ......................................................................................... 16
   6.22.8 For increase in operating pressure............................................................. 16
   6.22.9 Piping veriﬁcation ..................................................................................... 16
     6.22.10 Liquid propane testing ............................................................................ 17
     6.22.11 Hydrostatic testing approval ................................................................... 17
7 Installations of speciﬁc types of appliances ............................................................ 18
  7.1 Boilers .............................................................................................................. 18
     7.1.4 Venting material ......................................................................................... 18
     7.1.5.1 Isolation of safety control ........................................................................ 18
     7.1.5.2 Limit controls........................................................................................... 18
     7.1.5.4 Low Water Cut-off (LWCO) Requirements ................................................. 18
     7.1.5.5 Installation and operation......................................................................... 19
  7.2 Generators, compressor/pressure boosters, engines, and turbines ................... 20
     7.2.1.9 Installation protection .............................................................................. 20
     7.2.1.10 Hoses .................................................................................................... 20
     7.2.4.1 Certiﬁcation ............................................................................................. 21
  7.23 Infrared heaters .............................................................................................. 22
     7.23.8 Clearance sign requirements ..................................................................... 22
  7.27 Water heaters ................................................................................................. 23
     7.27.8 Requirements for use with combination space heating systems ................ 23
     7.27.9 Mobile/manufactured homes .................................................................... 25
8 Venting systems and air supply for appliances ........................................................ 26
  8.9 Appliance venting ............................................................................................. 26
     8.9.6.1 Installation of ULC 636 ............................................................................. 26
  8.10 Methods of venting appliances ....................................................................... 26
     8.10.3.1 Sidewall venting ..................................................................................... 26
     8.10.4.1 BH venting selection .............................................................................. 26
  8.12 Chimneys ....................................................................................................... 27
     8.12.1.1 Clariﬁcations ......................................................................................... 27
     8.12.10.1 Chimney liner cap ................................................................................ 30
  8.13 Vent and chimney sizing ................................................................................. 30
     8.13.4 DP column ................................................................................................ 30
  8.14 Vent and chimney termination ........................................................................ 31
     8.14.8 Vent termination limitations ...................................................................... 31
     8.14.14 Property clearance .................................................................................. 31
     8.14.15 Ice and frost ........................................................................................... 32
Appendix A - Installation of piping or tubing in rocky areas ........................................ 33
Appendix B - Landslide reference .............................................................................. 34
4 General
4.3 Responsibilities of the installer
4.3.9 Activation data
Installers shall supply a record of the properly adjusted manifold pressure for all gas
appliances. This is not required for appliances that have a factory set gas pressure or
are nonadjustable. All gas appliances shall have the start-up, adjustment, and safety
checks performed as directed in the appliance installation manual. This data shall be
displayed prominently on the appliance with a permanent marking device in a legible
manner or in the start-up sheet accompanying the installation manual that is left on
site.

Rationale: The intent of 4.3.9 is to ensure appliances are properly commissioned in
accordance with the manufacturer’s installation instructions.



4.3.10 Activations
The contractor shall provide Gas Inspections 48 hours’ notice prior to initiating the
activation of gas-ﬁred equipment that is rated 1 000 000 Btu/h and over. The gas
inspector, upon notiﬁcation, shall determine if the activation of the equipment requires
the presence of a factory-trained technician, the installer, and/or the gas inspector.
Activations in high occupancy buildings shall take place when buildings are relatively
unoccupied.

      Note: You may require a permit and inspection from TSASK BPV Inspection
      Services for some boilers and/or pressure vessels. Contact TSASK for more
      information.




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4.3.11 Test ﬁring
For equipment that has been deemed as requiring the presence of a gas inspector to
activate, any and all permissions to "test ﬁre" this equipment in our absence (prior to
commissioning) must be received from Gas Inspections in written form. The permission
must include the location, date, and personnel allowed to test ﬁre the appliance, with an
expectation that test ﬁring is limited in scope and that the equipment may not be placed
into operation until it is activated in the presence of the gas inspector.

Rationale: The intent of 4.3.10 and 4.3.11 is to provide a policy that ensures high input
equipment is safely commissioned and function tested.



4.5 Suitability of Use
4.5.5.1 Other damages
The inspection of appliances that have been subjected to other damage shall include
the mechanical and electrical systems of appliances that have been subjected to
smoke, soot, and the effects of ﬁre suppression.

Rationale: The intent of 4.5.5.1 is to further deﬁne and clarify the term “other damage”.



4.9 Hazardous locations
4.9.3 Dugouts and partial basements
An appliance shall not be installed:

   a) on an earth ﬂoor; or
   b) in an area having uncribbed earth walls unless a clearance of 4 ft (1.2 m) can be
      maintained around the appliance.

Rationale: The intent of 4.9.3 is to establish and provide a suitable distance between a
gas appliance and a sloping dirt wall based on unstable soil conditions commonly found in
Saskatchewan.




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4.11 Isolation of safety devices
4.11.1 Car sealed
Where burners are required to operate constantly, then a locked-open, or sealed-open,
manual valve to isolate a safety limit control may be installed for servicing, maintenance
or testing purposes. This valve may only be unlocked, or unsealed, and closed if the gas-
ﬁred equipment under the protection of the safety limit control has continuous manual
supervision while the safety limit control is out of service. A documented work
procedure submitted and acceptable to Gas Inspections shall be followed during use of
each such isolation valve. Under no circumstances are input lines to relief valves to be
isolated or have isolation valves installed.



4.11.2 Pressure relief path
In a plant environment, where a relief valve terminates into a common ﬂare header, a
locked-open, or sealed-open, full port manual valve may only be used to isolate the
operational ﬂare header from the relief valve discharge (for maintenance purposes of
the equipment under the protection of the relief valve) when the TSASK Pressure Relief
Path (PRP) Stop Valve Control Program is utilized. The requirements for application and
the PRP Stop Valve Control program manual are available from TSASK Boiler & Pressure
Vessels. Copies must be made available to both TSASK Boiler & Pressure Vessel and to
TSASK Gas Inspections for approval.

Rationale: The intent of 4.11.1 and 4.11.2 is to provide detail and acceptable requirements
for servicing safety valves in industrial locations. These code clauses are aligned with
TSASK Boiler & Pressure Vessel rules for the same sites.




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4.14 Accessibility
4.14.8 Acceptable design methods
4.14.8.1 Walkways
A walkway shall

   a) be raised and securely aﬃxed to the roof;
   b) be a minimum of 18 in (610 mm) wide and constructed and supported to handle
      the anticipated loads without appreciable material deﬂection;
   c) have anti-skid characteristics such as provided with an expanded metal surface.
      An adhesive anti-skid material applied directly to the roof does not create an
      acceptable all-weather walkway;
   d) have a hand/guard rail starting at the point of access to a distance of 6 ft (1.8 m)
      from the roof edge along the walkway when the point of access to the roof is
      within 6 ft (1.8m) of the edge and the roof slope is 3 in 12 or less pitch;
   e) have a hand/guard rail continuously along the walkway when the roof exceeds a
      3 in 12 pitch;
   f) have a hand/guard rail that is constructed in accordance with current
      Saskatchewan OH&S regulations; and
   g) be designed to ensure that the roof structure has the capability to support the
      additional load associated with the walkway structure;
   h) or of an approved engineering design.



4.14.8.2 Working platforms
A working platform shall

   a) be securely aﬃxed to the roof;
   b) be located on all sides of the appliance that requires servicing access;
   c) be constructed as the walkway and be a minimum of 30 in (762 mm) in width,
      with a hand/guardrail constructed as required for the walkway;
   d) be installed within 6 in (152 mm) horizontally of the appliance’s edge in a way
      that does not interfere with any part of the appliance that requires removal for
      servicing purposes; and
   e) be designed to ensure that the roof structure has the capability to support the
      additional load associated with the working platform structure;
   f) or of an approved engineering design.




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4.14.8.3 Access with multiple roof levels
A building with gas appliances installed on roofs with multiple levels shall have

   a) a permanent ﬁxed access ladder or suitable step/stairway as part of the
      continuation of the walkway system where passage is obstructed by a pony wall
      or parapet higher than 3 ft (914 mm) in height to allow for safe access to gas
      appliances;
   b) the access ladder designed and constructed to meet requirements as speciﬁed
      in the current Saskatchewan OH&S regulations; and
   c) the steps/stairways designed and constructed to meet the requirements as
      speciﬁed in the National Building Code of Canada;
   d) or of an approved engineering design

Rationale: The intent of 4.14.8 is to provide suﬃcient and acceptable means of access to
appliances on roofs in order to permit maintenance, repair and replacement, based on roof
pitch.




6 Gas piping systems
6.2.23 CSST prohibition
6.2.23.1 Prohibited connection to a swing
CSST shall not be directly connected to a black iron swing joint.

Rationale: The intent of 6.2.23.1 is to ensure a black iron swing joint will perform as
intended without causing excessive strain on the CSST pipe and connection.




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6.7 Location
6.7.7 Aggressive environments
Gas piping systems installed in an aggressive environment including, but not limited to,
intensive livestock barns, and potash mines, shall not use materials with low tolerance
for these conditions. The use of CSST, schedule 10 steel piping, or brass ﬁttings and
components, on gas piping systems in these environments is prohibited. Where the
source for corrosion is a component of the gas stream, such as sour oilﬁeld or digester
gas, low tolerance materials, such as CSST, schedule 10 steel piping, or brass, shall not
be allowed in contact with the gas stream.

Rationale: The intent of 6.7.7 is to align with CSA B.149:25 Clause 6.2.3.1 to prohibit
susceptible piping installed in aggressive environments, based on past failures of light
wall pipe.



6.8 Piping practices
6.8.8 Supply header exceeds NPS 2-1/2
6.8.8.1 Prohibition
Job-fabricated welded ﬁttings (for example, branch connections job-fabricated using
the stub-in and back-welding method in CSA B149.1:25) are not allowed in any gas
piping system. Branch connections on steel gas piping systems shall use a
manufactured ﬁtting, such as a tee, weld-o-let, or thread-o-let, meeting the material
selection criteria of CSA B149.1:25 Clause 6.2.2.

Rationale: The intent of 6.8.8.1 is to specify the use of approved ﬁttings in order to align
with weld procedures in reference to standards governing their speciﬁc application.



6.11 Appliance connections
6.11.1.1 Rigid cabinet penetration
Except as permitted by TSASK CSA B149.1:25 Interpretations Clause 6.11.1.2, where an
appliance is connected to a ﬂexible piping or tubing system, connection to the appliance
shall be outside the cabinet and into a tee ﬁtting containing a drip pocket and rigid
piping that extends to the appliance gas valve.




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6.11.1.2 Flexible cabinet penetration
A ﬂexible piping or tubing system may be used with a protective sleeve to:

   a) penetrate the cabinet of a mobile/manufactured home furnace, or
   b) penetrate the cabinet of a ﬁreplace.

Rationale: The intent of 6.11.1.1 and 6.11.1.2 is to align drip pocket requirements of CSA
B.149.1:25 Clause 6.13.1 and the CSST manufacturer’s installation instructions to prevent
physical contact between CSST and an appliance cabinet.



6.11.7 Appliance connections
Installers must provide an effective swing joint at all rigid piping manifold connections
to meters or appliances installed on earth supported ﬂoors, or pad-mounted outdoors.
When using threaded pipe, the swing joint shall consist of two consecutive threaded 90°
elbows installed on a nominally horizontal plane.

When using ﬂexible piping or tubing, the installer shall provide a 5 in (125 mm) to 8 in
(200 mm) free motion offset connected to a tee ﬁtting containing a drip pocket and rigid
piping that extends to the appliance gas valve. The ﬂexible piping or tubing shall not be
anchored in a manner in which movement of the appliance due to soil conditions
causes stress on the gas piping or tubing.

Rationale: Piping swing joints and tubing offsets are required due to ground movement
throughout the province. Proper piping swing joint and tubing offset conﬁguration ensures
that the piping and tubing system and appliance/meter assembly are permitted to move
independently without creating undue pressure or stress on the piping or tubing system.




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6.15 Underground piping and tubing
6.15.2.1 PE pipe connection
Underground polyethylene piping systems shall only be joined below grade by butt
fusion, socket fusion, electrofusion, or mechanical ﬁttings certiﬁed to CSA B137.4 (such
as "Permasert" or "Con-Stab"), except for underground piping systems in active
landslide areas (see TSASK CSA B149.1:25 Interpretations Appendix B) in which case
all mechanical ﬁttings underground are prohibited.

Rationale: The intent of 6.15.2.1 is to provide acceptable means of polyethylene
connections below grade in active landslide areas. This is due to excessive force being
applied to ﬁttings during ground movement.



6.15.2.2 Steel connection
On steel underground gas piping systems, the use of press ﬁt ﬁttings is allowed if the
following steps are followed:

   a) a site plan and isometric drawings are supplied in advance to TSASK Gas
      Inspections; and
   b) the installing contractor has supplied TSASK with the certiﬁcation and company
      information about who will be applying the exterior coating. The corrosion
      protection must be listed in the manufacturer’s installation instructions.

Rationale: The intent 6.15.2.2 is to align with CSA 6.32 and CSA B.149.1:25 Clause 6.16.1
to provide permission requirements for the installation and protection of press connect
ﬁttings below grade.



6.15.3.1 Type L tubing connection
Type L coated copper liquid propane tubing having an underground tubing connection
shall have a polyethylene shrink wrap sleeve installed to cover any exposed section of
tubing and ﬁtting. The sleeve shall be positioned to one side of the connection, exposing
the connection during the air test, and installed permanently over the connection after
the completion of the air test and before burial.

Rationale: The intent of 6.15.3.1 is to ensure that the external coated copper tubing
protection below grade is continuous.




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6.15.3.2 Copper tubing connection
Acceptable underground copper tubing systems shall only be joined below grade by
brazing with a material that has a melting point exceeding 1000°F (525°C).

Rationale: The intent of 6.15.3.2 is to identify acceptable means of joining copper tubing
below grade due to excessive force applied during ground movement within the province.



6.15.4.1 Rocky terrain
Where, due to rocky terrain, it is impractical to comply with section 6.15.4, piping and
tubing systems may be installed in accordance with TSASK CSA 149.1:25
Interpretations Appendix A.

Rationale: Appendix A outlines requirements on how to safely gas pipe in rocky terrain.
Information is not readily available in the national code to ensure a level of safety for these
applications.



6.15.8.1 Swing
A minimum 10 in (250 mm) piping swing joint or tubing offset, measured from center to
center, shall be installed at above ground connections to underground piping systems
up to and including 2 in NPS. Swing joints are only effective when constructed from
threaded pipe or press connect* are installed. Welded ﬁttings do not provide an
approved swing joint.

When using threaded or press connect piping and ﬁttings, the swing joint shall consist
of two consecutive 90° elbows installed on a nominally horizontal plane.

When the underground material is copper tubing that is piped into an acceptable
threaded or press ﬁt swing joint, an offset in the copper tubing is redundant and not
necessary. Due to its lower tensile strength, underground CSST will require an above-
ground offset before transitioning to a steel piping system.

*In accordance with the manufacturer’s support.

Rationale: Piping swing joints and tubing offsets are required due to ground movement
throughout the province. Proper piping swing joint and tubing offset conﬁguration ensures
that the piping and tubing system and appliance/meter assembly are permitted to move
independently without creating undue pressure or stress on the piping and tubing system.




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6.15.10.1 Grade point sleeve
Where piping or tubing penetrates the grade-level, a sleeve shall be installed a minimum
of 6 in (150 mm) above to 12 in (300 mm) below grade-level, to protect the piping or
tubing where it penetrates grade-level by permitting free movement of the soil and
covering without placing strain on the piping or tubing.

Rationale: The intent of 6.15.10.1 is to require grade point sleeves on all risers due to the
possibility of paving to occur after installation and to provide dimensional detail for those
sleeves.




6.15.14.1 Tracer wire
Non-metallic piping or tubing shall be accompanied by a minimum 14 AWG TWU copper
tracing wire. The tracer wire must be taped to the gas line using low conductivity
electrician's tape at consistent [max. 16 ft (5 m)] intervals, unless pipe and tracer wire
are installed by ploughing. Tracer wire terminations shall be readily accessible.

Rationale: The intent of 6.15.14.1is to provide detail on tracer wire size and installation.




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6.15.16 Liquid propane
Underground piping or tubing used to conduct liquid propane is restricted to non-
residential purposes and subject to these requirements:

   a) the installation of underground liquid propane piping shall not commence until
      approval is granted by the local gas inspector;
   b) where a pump is used,
      i) the liquid supply line shall have an automatic shut off valve (located upstream
          of buried piping) that will close automatically when the pump is shut off; and
      ii) vapour return piping shall comply with liquid requirements except that listed
          in 6.15.16(b)(i); and
   c) piping risers shall be sleeved at least one size larger than the riser and shall
      extend from the horizontal section of the underground line to 12" (300 mm)
      above grade to provide for ventilation of the underground line.

Rationale: The intent of 6.15.16 is to provide detail and permission on the use of
underground liquid propane installations in Saskatchewan.



6.15.17 Landslide areas
Saskatchewan has several active landslides. These are located along the valley walls of
rivers and lakes.

When installing a gas service to one of these areas check with the property owner for a
copy of the geotechnical report showing where the structure is placed in relation to the
fault lines. The gas utility cannot pass across fault lines with their service line. This
means the gas meter may be installed some distance from the building. In this case,
consult with the district gas inspector to see how the four ounce pressure supply line
can be routed. You will need a copy of the geotechnical report in order to have the
consultation with the gas inspector.

In some cases, the gas utility will have a copy of the geotechnical report.

Do not install any underground supply lines that cross fault lines in a landslide area
without the district gas inspector's approval.

Refer to Appendix B - Speciﬁcations for service lines through fault lines in active
landslide areas in Saskatchewan for more details on requirements.




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All below ground service line piping shall be polyethylene, minimum diameter 1-1/4 in
NPS, joined using butt or socket fusion (including electrofusion) means only. No
mechanical joining methods are permitted below ground.

The use of service head adapter risers, such as X-Riser and SurSeal, are permittable in
these conditions.

Rationale: The intent of 6.15.17 is to establish the means by which piping must be
installed and conﬁgured in landslide areas due to Saskatchewan soil conditions.




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6.17 Identiﬁcation of piping or tubing
6.17.1.1 Liquid propane
At all types of facilities, all exposed or above-ground liquid propane piping and tubing
shall be painted yellow or red and shall be labelled or marked "HIGH PRESSURE LIQUID
PROPANE".

Rationale: The intent of 6.17.1.1 is to identify a consistent means of identiﬁcation for
liquid propane piping.



6.17.4.1 Permanent identiﬁcation methods
Acceptable means of permanent identiﬁcation of the room number, apartment number,
or the area of the building served by each piping or tubing system include:

   a) an embossed tag with raised lettering on a stainless steel, brass, or aluminum
      tag; or
   b) an engraved tag with engraved lettering on a stainless steel, plastic, or aluminum
      tag.



6.17.4.2 Fastening tags
All tags shall be fastened using an ultraviolet and corrosion resistant system such as
stainless steel wire.



6.17.4.3 Prohibited methods
Unacceptable means of compliance include:

   a) “permanent" marker, whether or not used on a tag, wall, or piping;
   b) any type of printed or written tag. There is no existing ink product with suﬃcient
      durability to UV degradation to be considered acceptable;
   c) illegible markings or tags; and
   d) plastic cable zip ties.

Rationale: The intent of 6.17.4.1, 6.17.4.2, and 6.17.4.3 is to establish acceptable means
of meter identiﬁcation that can withstand Saskatchewan design temperatures and
conditions.




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6.20 Gas hose and ﬁttings
6.20.3 Installation
When a gas hose is used

   l) to connect to mobile/manufactured homes or park model trailers the maximum
      10 ft (3 m) in length gas hose connected to the supply utility must terminate to
      rigid piping at a location outside of where a skirting is currently installed, or
      where a skirting may be installed in the future;
   m) to connect to agricultural or oilﬁeld gas burning equipment, such as a grain dryer
      or treater, then the hose shall be protected from damage and shall not exceed 30
      ft (9.1 m) in length;
   n) to convey liquid propane from a storage tank to a grain dryer, it shall be piped
      with a new certiﬁed 30 foot hose or underground copper with ﬂared ﬁttings at the
      tank and the grain dryer. The connection points shall be service tested with soap
      or approved leak detector; and
   o) for liquid propane, and has previously been in use, it shall be tested while under
      restraint.

Rationale: The intent of 6.20.3(l) is to clarify that the connections of a gas hose for a
mobile/manufactured home are to occur outdoors.

The intent of 6.20.3(m), 6.20.3(n), and 6.20.3(o) is to provide requirements for gas hoses
used in agricultural, oilﬁeld and liquid propane applications. These requirements address
past failures.



6.21 Gas connectors
6.21.3 Corrugated metal gas connector
Except as speciﬁed in CSA B149.1:25 Clause 7.23.3, a corrugated metal gas connector
certiﬁed to CSA/ANSI Z21.24/CSA 6.10 may be used to connect

   d) rigid piping to a mobile/manufactured home furnace within the furnace cabinet,
      or to connect a water heater in a mobile/manufactured home.

Rationale: The intent of 6.21.3 is to permit the use of a CSA 6.10 connector within a
mobile/manufactured home furnace cabinet due to the restrictive location and access.




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6.22 Testing of piping, tubing, hose and ﬁttings
6.22.1.1 Notiﬁcation
Gas Inspections shall be notiﬁed of all underground, commercial, and industrial air tests,
as well as residential air tests on loads over 1 000 000 Btu/h.



6.22.2.1 Low pressure testing
All copper and polyethylene piping systems shall be leak tested using air or inert gas
(such as nitrogen) as the test medium. All steel piping systems where the test pressure
generates a stress below 30% of Speciﬁed Minimum Yield Strength (SMYS) of the piping
material shall be leak tested using air or inert gas as the test medium. Only under
special circumstances will Gas Inspections permit liquid hydrostatic testing of piping
systems, (see TSASK CSA B149.1:25 Interpretations Clause 6.22.2.2 regarding
applications to Gas Inspections for approval to use a liquid as the test medium).

Example test pressures equating to a stress of 30% Speciﬁed Minimum Yield Strength
(SMYS) for steel piping systems are given in TSASK CSA B149.1:25 Interpretations
Appendix C.



6.22.2.2 High pressure testing
For test pressures exceeding a stress of 30% of Speciﬁed Minimum Yield Strength
(SMYS):

   a) both a leak and a strength test are required following the testing requirements
      and limitations of CSA Z662;
   b) 100% of all welds have successfully passed radiographic inspection; and
   c) air, inert gas or liquids are permissible as the leak and strength test medium on
      natural gas piping, provided the test and purge procedures have been approved
      by the Chief Gas Inspector. The temperature of liquid freezing must be
      signiﬁcantly lower than the potential ambient temperature during the test. Purge
      procedures must include a liquid removal and disposal plan, and a plan for drying
      the gas piping system to an acceptable dewpoint of 0°F (-18°C). Liquids are not
      permissible as a test medium on propane piping systems.




                                                                         P a g e 15 | 35
6.22.2.3 Isolation
The pressure test described in CSA B149.1:25 Clause 6.22.2 shall be conducted on the
entire gas piping system including all piping (including drops) to each appliance. The
gas piping system shall be isolated from all appliance connections and isolated from all
connections to live gas piping systems, utilizing positive pressure terminations, in the
form of blinds, caps or plugs located at each tie-in point. Valves do not provide a
positive pressure termination, and all valves in the gas piping system shall be in their
fully open position during this pressure test.



6.22.7 Dormant piping
Where the fuel supply has been shut off to a building or equipment for a period
exceeding one year, prior to reactivation the contractor shall:

   a) air test the entire piping or tubing system downstream of the isolation point;
   b) ensure that the appliances and venting system are safe for continued use; and
   c) submit a gas permit and the appropriate fee.



6.22.8 For increase in operating pressure
Where the operating pressure of the gas piping system is being increased, the entire gas
piping system affected by the change in operating pressure must be retested in
compliance with CSA B149.1:25 Clause 6.22, including situations where the new
pressure test duplicates the parameters of the original pressure test.



6.22.9 Piping veriﬁcation
On all installations of a piping or tubing system, the installer shall complete a piping
veriﬁcation tag and hang the tag on the gas line in an accessible location proximal to
the work performed. Piping veriﬁcation tags may be those purchased from Gas
Inspections or may be of the gas contractor's company design provided that the same
information is provided at minimum.

Rationale: The intent of 6.22.1.1, 6.22.2.1, 6.22.2.2, 6.22.2.3, 6.22.7, 6.22.8, and 6.22.9 is to
provide clariﬁcation related to piping test procedures. These requirements address past
failures.




                                                                               P a g e 16 | 35
6.22.10 Liquid propane testing
The maximum operating pressure deﬁned in the notes to Table 6.3 for liquid and vapour
propane piping and tubing shall be used for material selection purposes. All liquid
piping and tubing shall be tested according to the following procedure:

   a) test pressure shall be 250 psig (1725 kPa);
   b) testing medium shall be dry air, nitrogen, or other inert gas;
   c) the testing apparatus shall include 2 calibrated test gauges [in accordance with
      CSA B149.1:25 Clause 6.22.2(b)] and shall be protected from overpressure using
      a certiﬁed and calibrated relief valve set at a start-to-discharge pressure of no
      more than 275 psig (1896 kPa);
   d) test duration shall be 180 minutes;
   e) underground piping and tubing shall be backﬁlled for restraint before the test is
      started, with all underground piping or tubing connections left exposed for the
      duration of the test; and
   f) the test shall include all hydrostatic relief valves which are part of the propane
      piping and tubing system under the test.

Rationale: The requirements listed in 6.22.10 are to provide test procedure clariﬁcation on
liquid propane piping, to ensure suﬃcient testing parameters and installer safety.



6.22.11 Hydrostatic testing approval
Requests for hydrostatic piping testing shall be submitted with persuasive justiﬁcation,
complete testing procedures, and complete drying procedures for approval. Testing
may or may not be approved.

The drying procedure shall include the following:

   a) drying medium;
   b) drying time; and
   c) wet testing (litmus paper or other means).

Rationale: The intent 6.22.11 is to provide test procedure clariﬁcation on hydrostatic
testing of piping to ensure suﬃcient testing parameters and installer safety.




                                                                           P a g e 17 | 35
7 Installations of speciﬁc types of appliances
7.1 Boilers
7.1.4 Venting material
ULC 636 PVC shall not be used as venting material for (Category IV) condensing boilers.

Rationale: The intent of 7.1.4 is to provide a minimum Category IV boiler vent temperature
rating of 90 degrees C to accommodate hydronic system alterations resulting in elevated
ﬂue temperatures.



7.1.5.1 Isolation of safety control
Boiler safety controls shall not be located or piped in such a way as to be isolated from
the boiler by manual valves, check valves, or automatic valves.

Rationale: The intent of 7.1.5.1 is to align with CSA B214 to ensure that safety
components are not compromised by isolation valves and devices.



7.1.5.2 Limit controls
All boilers shall have two limit controls. One shall act as an operating control, and one
shall act as a high limit safety control.

Rationale: The intent of 7.1.5.2 ensures boiler operation safety in accordance with the
requirements of CSA B214.



7.1.5.4 Low Water Cut-off (LWCO) Requirements
7.1.5.4.1 LWCO conditions
When the boiler is located above the lowest point in the heating system, a safety control
to protect against low water conditions must be present as part of the certiﬁed
appliance or must otherwise be installed. See TSASK CSA B149.1:25 Interpretations
Clause 7.1.5.5.2.




                                                                           P a g e 18 | 35
7.1.5.4.2 LWCO installation
Where used, low water cut-off (LWCO) safety devices shall be installed and piped in the
same manner as required by the Boiler and Pressure Vessels Act to allow for inspection
and testing.

Rationale: The intent of 7.1.5.4 is to ensure a boiler cannot operate in a low water
condition.



7.1.5.5 Installation and operation
7.1.5.5.1 No ﬂow
Boilers designed to have burner operation with no ﬂow conditions present shall be
installed as per the manufacturer's installation instructions and any other requirements
set forth by any national or local codes and jurisdictions.



7.1.5.5.2 Requiring ﬂow
A coil or ﬁn-tube boiler requiring forced circulation to prevent overheating of the coils or
tubes shall be equipped with a ﬂow-sensing device installed integral to the unit or within
the outlet piping, and the sole function of the device shall be to shut off the fuel supply
when the circulating ﬂow drops below the minimum ﬂow rate required to prevent
overheating. Where a ﬂow sensing device is used, a separate low water cut-off (LWCO)
device per TSASK CSA B149.1:25 Interpretations Clause 7.1.5.4.1 is not required.



7.1.5.5.3 Return temperature control
Boilers sensitive to low return water temperatures shall be installed and controlled in
such a way as to maintain the minimum return water temperature during normal
operation. Owners and/or operators shall be instructed of any requirements regarding
minimum return water temperature.




                                                                            P a g e 19 | 35
7.1.5.5.4 Temperature/pressure monitoring
Unless internally equipped, boiler installations shall include a minimum of two
thermometers or temperature sensors located to accurately sense the water
temperature inside (or leaving) the boiler and the return water temperature entering the
boiler. Installations shall have a minimum of one pressure gauge located to accurately
sense boiler pressure.

Rationale: The intent of 7.1.5.5 is to ensure a boiler cannot operate in a low ﬂow condition
and maintains a minimal return inlet temperature in accordance with CSA B214.



7.2 Generators, compressor/pressure boosters, engines, and
turbines
7.2.1.9 Installation protection
CSA B149.1:25 Clause 7.2.1.9(e) "is interlocked to shut off the appliance" is not
mandatory in Saskatchewan. See TSASK CSA B149.1:25 Interpretations Appendix F for
gas detection concentration unit conversions.

Rationale: The intent of exempting CSA B149.1:25 Clause 7.2.1.9(e) interlock requirement
is due to the danger of shutting down an emergency use generator actively providing
power to critical operation equipment.



7.2.1.10 Hoses
An engine shall be equipped with a gas hose certiﬁed to CAN/CSA-8.1, CAN/CSA-8.3,
ULC C536, or CGA CR96, not exceeding 6 ft (2 m) in length. Where the safety shut-off
valve or valves are not supplied with and mounted to the engine or engine package by
the manufacturer, the gas hose shall be installed downstream of the safety shut-off
valve or valves. The valve train upstream of the gas hose shall be mounted, anchored,
and supported in such a manner as to minimize damage to the valve train from
vibration.

Rationale: The intent of 7.2.1.10 is to ensure that, when required, additional safety shut-off
valves are conﬁgured to offer protection to downstream gas hoses.




                                                                            P a g e 20 | 35
7.2.4.1 Certiﬁcation
An engine or turbine shall be certiﬁed to ANSI/CAN UL/ULC2200 or comply with CSA
B149.3.

In Saskatchewan the requirements of CSA B149.1:25 Clause 7.2.4.1 are not required
when the engine is used in agricultural and oilﬁeld industries.

In addition to the requirements of the CSA B149.1:25 Natural gas and propane
installation code, an engine up to 500 HP (372kW) in size shall:

   a) be certiﬁed;
   b) comply with CSA B149.3:25 Clause 17.3; or
   c) comply with CSA B149.1:25 Annex N.



Rationale: The intent of 7.2.4.1 is to clarify certiﬁcation requirements associated with
engines and turbines in low occupancy agricultural and oilﬁeld applications.




                                                                            P a g e 21 | 35
7.23 Infrared heaters
7.23.8 Clearance sign requirements
A clearance sign shall be installed with all infrared heater installations. The clearance
sign may be as supplied by the heater manufacturer. In the event that a clearance sign
is not supplied with the heater, or is missing, a clearance sign shall be installed
following these minimum requirements:

   a) the sign shall be not less than .020 GSG (0.8 mm) metal;
   b) the sign shall be prominently displayed and attached with light metal chain to the
      bottom edge of the reﬂective shield; and
   c) the sign paint shall be heat resistant. Lettering shall be a minimum ¾ in (19 mm)
      high, red on white background, and shall contain the following information:




Rationale: The intent of 7.23.8 is to provide dimensional detail on clearance sign
requirements and to ensure the equipment user maintains clearance to combustibles.




                                                                          P a g e 22 | 35
7.27 Water heaters
7.27.8 Requirements for use with combination space heating systems
7.27.8.1 Certiﬁcation
Only water heaters certiﬁed for use in a combination space heating system shall be
used. Water heaters shall not be used in a space heating only application.



7.27.8.2 Connection
Side or bottom connections on water heaters shall not be used in combination space
heating system applications unless speciﬁcally allowed in the manufacturer's
instructions.



7.27.8.3 Circulator
A combination space heating system shall have a timed circulator rated for potable
water use to fully circulate the water on the space-heating loop back to the water heater
every 24 hours.



7.27.8.4 Heat exchanger
A heat exchanger that is rated for potable water use shall be used to transfer heat
between the potable water and the heating ﬂuid when a non-potable heating ﬂuid is
used in the space heating system.




                                                                         P a g e 23 | 35
7.27.8.5 Requirements
When a heat exchanger is used, the following requirements shall apply:

   a) a device shall be installed to automatically maintain the operating pressure of the
      hydronic heating (secondary) loop lower than that of the potable water (primary)
      loop;
   b) the gas contractor shall aﬃx a prominent and permanent label to the pressure
      relief valve in the hydronic heating loop advising that the heat exchanger shall be
      examined in the event of a pressure relief valve discharge;
   c) isolation valves shall be installed on the piping inlets and outlets of the heat
      exchanger;
   d) a timed circulator rated for potable water use shall be installed to fully circulate
      the water on the potable water loop back to the water heater every 24 hours;
   e) when temperatures greater than 140°F (60°C) are required in the space heating
      loop, a thermostatic mixing valve shall be installed to ensure that the potable
      water does not exceed 140°F (60°C); and
   f) the hydronic heating loop shall require the following additional components:
      i) a pressure relief valve capable of protecting the lowest rated component of
             the system;
      ii) an expansion tank that is;
          I)    rated for use in a hydronic system for the maximum system temperature
                and pressure, and
         II)    set to the system ﬁll pressure;
      iii) a back-ﬂow prevention device if potable feed water piping is attached;
      iv) a pressure gauge;
      v) temperature gauges located on the supply and on the return;
      vi) a circulator; and
      vii) an air eliminator.

Rationale: The intent of 7.27.8 is to align combination space heating requirements
between B214 and manufacturer installation instructions to minimize risks commonly
encountered in combination heating systems.




                                                                         P a g e 24 | 35
7.27.9 Mobile/manufactured homes
All water heaters installed or replaced in mobile/manufactured homes shall conform to
the following speciﬁcations:

   a) water heaters shall be certiﬁed for installation in a mobile/manufactured home
      per CSA B149.1:25 Clause 4.8.1, unless the wheels, axels, and towing hitch have
      been removed per CSA B149.1:25 Clause 4.8.2, then CSA B149.1:25 Clause 4.8.3
      applies;
   b) when installed, storage water heaters shall be secured to the ﬂoor at two legs,
      and the top of the heater is to be secured with a bracket from a wall. Speciﬁed
      clearances are to be maintained;
   c) for draft hooded or power vented water heaters, the water heater shall be
      installed in an enclosure which provides complete separation of the heater from
      the air within the home;
   d) access to the heater may be either from outside the home or inside the home
      providing the door is tight ﬁtting;
   e) for draft hooded water heaters, the heater enclosure shall be provided with a
      minimum of two screened openings to outdoors, each with a minimum area of 7
      in square [3 in (75 mm) in diameter];
      i) the upper opening is to be taken through the ceiling or within 18 in (450 mm)
          of the ceiling, ensuring it is above the relief opening of the draft hood;
      ii) the lower opening is to be taken through the ﬂoor or through an outside wall
          not exceeding 6 in (150 mm) above the ﬂoor;
   f) power vented water heaters require a combustion air opening to the outdoors per
      TSASK CSA B149.1:25 Interpretations Clause 7.27.9(e)(ii); and
   g) direct vented (sealed combustion) water heaters are permissible where CSA
      B149.1:25 Clause 4.8.3 applies.

Rationale: The intent of 7.27.9 is to ensure compliance with requirements from other
applicable codes. These requirements are speciﬁc to mobile/manufactured homes and
maintain the certiﬁcation of the dwelling unit.




                                                                       P a g e 25 | 35
8 Venting systems and air supply for appliances
8.9 Appliance venting
8.9.6.1 Installation of ULC 636
When installing ULC 636 pipe and ﬁttings from a manufacturer that requires a primer to
be used at a speciﬁed ambient temperature, the certiﬁed primer shall be used,
regardless of the ambient temperature.

Rationale: The intent of 8.9.6.1 is to ensure primer is used on ULC 636 PVC/CPVC venting
as manufacturers assembly temperatures and conditions fall outside of the parameters of
Saskatchewan’s design temperatures.



8.10 Methods of venting appliances
8.10.3.1 Sidewall venting
All unit heaters being installed with sidewall venting in a residential building must use
certiﬁed Category III venting material (typically stainless steel). Type BH vents are
certiﬁed for Category III venting. Category III venting is a positive pressure, non-
condensing application.

Rationale: The intent of 8.10.3.1 is to align with CSA 2.6 requiring listed venting material
to be installed when sidewall venting unit heaters in a residential building.



8.10.4.1 BH venting selection
BH venting material shall be capable of the highest temperature ﬂue gases that may be
produced by the appliance that it is venting. This includes the highest elevated
temperature ﬂue gases produced by any user-accessible setting or conﬁguration of the
appliance.

Rationale: The intent of 8.10.4.1 is to ensure appliance venting is not subjected to
temperatures above their listed rating if user-accessible settings are manipulated.




                                                                             P a g e 26 | 35
8.12 Chimneys
8.12.1.1 Clariﬁcations
The following clariﬁcations shall be followed for chimneys and vents:

   a) chimneys:
      i) prefabricated Type A chimneys shall not be installed to vent gas ﬁred
             appliances with a stack temperature less than 470º F (245°C); and
      ii) when connected to a gas appliance, masonry, concrete, brick and tile
             chimneys shall be lined with an approved metal chimney liner. A lined
             chimney shall be provided with an accessible inspection opening. An
             inspection opening shall be of such construction that it will remain tightly
             closed when not in use to prevent the entrance of air into the chimney at that
             point;
   b) existing tile lined masonry chimneys in sound condition:
      i) when replacing only the water heater in a common vent application, no
             change is required;
      ii) when replacing a central heating appliance, or when altering the Btu/h load on
             the venting system, install a metal liner in accordance with TSASK CSA
             B149.1:25 Interpretations Clause 8.12.1.1(f) or a type B gas vent; and
      iii) when serving only a water heater, install a metal liner in accordance with
             TSASK CSA B149.1:25 Interpretations Clause 8.12.1.1(f) or a type B gas vent;
   c) masonry chimneys with an existing metal liner in sound condition:
      i) if properly sized, interior located masonry chimneys may be used to vent:
          I)    draft hood equipped appliances; or
         II)    fan assisted appliances;
   d) exterior masonry chimneys:
      i) when removing the largest (or major) Category I gas appliance vented into an
             exterior masonry chimney, the masonry chimney may not continue to be used
             unless it is lined with a properly sized B vent, L vent or an approved liner;
   e) existing Type A factory built metal chimneys and other insulated metal chimneys:
      i) when replacing only the water heater in a common vent application, no
             change is required if the current chimney is in a sound condition;
      ii) when replacing a central heating appliance, or when altering the Btu/h load on
             the venting system, install a metal liner in accordance with TSASK CSA
             B149.1:25 Interpretations Clause 8.12.1.1(f) or a Type B gas vent;
      iii) when serving only a water heater, install a metal liner in accordance with
             TSASK CSA B149.1:25 Interpretations Clause 8.12.1.1(f) or a Type B gas vent;




                                                                          P a g e 27 | 35
iv) if oversized (water heater only), reduce in size in accordance with code
    requirements and use a certiﬁed B vent or approved chimney liner. When the
    water heater only is in an oversized Type A chimney and the water heater is
    replaced, the chimney shall be sized as per the vent tables in CSA B149.1:25
    Annex C; and
v) when an existing Type A chimney is found to be unsound or defective
    (collapsing), it shall be replaced with a Type B vent and sized as per the vent
    tables in CSA B149.1:25 Annex C.

Note: Replacement components of Type A metal chimneys are no longer approved
in Saskatchewan. Chimneys with defects must be replaced with a certiﬁed Type B
gas vent.




                                                                    P a g e 28 | 35
   f) chimney liners and vent connectors:
      i) aluminum ﬂexible chimney liners and ﬂexible vent connectors shall be
             certiﬁed for the application of intended use;
      ii) for downsizing an existing Class A chimney in sound condition or a B Vent in
             sound condition, a ﬂexible liner certiﬁed for use in a factory-built chimney, a
             solid liner, or a B Vent may be used. The existing Class A chimney does not
             need to be reduced in height;
      iii) when a solid aluminum vent pipe is used to line or downsize a masonry
             chimney, a Class A chimney, or a Type B gas vent, or as vent connectors the
             following wall thicknesses shall be used:
          I)     3 in (75 mm) to 12 in (300 mm) must be minimum .025 inches (0.64 mm,
                 or 22 gauge); and
         II)     13 in (325 mm) to 20 in (500 mm) must be minimum .032 inches (0.81
                 mm, or 20 gauge);
      iv) shop fabricated aluminum square liner is permissible where required;
      v) all liners shall be installed with the crimped end down. All joints in liners are to
             be fastened with stainless steel screws or aluminum or stainless-steel rivets;
      vi) liners that exceed the speciﬁcations in the venting tables are subject to good
             engineering practices;
      vii) aluminum venting and liners may only be used for gas-ﬁred appliances
             producing ﬂue gas temperatures of more than 275°F (135°C) but not more
             than 470°F (245°C); and
      viii) where the manufacturer's appliance installation instruction calls for
             heavier or thicker vents or vent connectors, the manufacturer's instructions
             shall be followed.

Rationale: The intent of 8.12.1.1 is to provide a basis for vent and chimney installations of
Category 1 appliances. These requirements mitigate past failures of venting systems
experienced within the province.




                                                                            P a g e 29 | 35
8.12.10.1 Chimney liner cap
Where a vent cap is installed as part of a lining system, adequate space must be
provided between the ﬂashing and vent cap to prevent a buildup of ice which could
block the ﬂow of products of combustion. Clearance between ﬂashing and vent cap
shall be between 5 in (125 mm) and 12 in (300 mm).

Rationale: The intent of 8.12.10.1 is to provide acceptable distances of vent cap
separation if not speciﬁed by the venting manufacturer.



8.13 Vent and chimney sizing
8.13.4 DP column
All residential vents or chimneys shall be sized using the "DP" column in the tables in
Annex C of CSA B149.1:25.

Rationale: The intent of 8.13.4 is to provide a consistent means of Category 1 vent sizing
used in a residential application based on building depressurization of 0.02 in wc.




                                                                          P a g e 30 | 35
8.14 Vent and chimney termination
8.14.8 Vent termination limitations
A vent shall not terminate

   h) underneath a veranda, porch, or deck unless
      iii) the 1 ft (300 mm) minimum clearance to the underside of the veranda, porch,
           or deck shall be measured from the top of the vent to the bottom of the joists;
   i) through a sidewall above a pedestrian doorway;
   j) less than 4 ft (1.2 m) beneath a ventilated soﬃt unless speciﬁed as per the
      manufacturer's instructions. For unvented soﬃts follow manufacturer's
      installation instructions.


8.14.14 Property clearance
A vent from a Category IV appliance:

   a) shall not pass through an exterior wall and terminate adjacent to the exterior wall
      unless there is a minimum unobstructed distance of 4 ft (1.2 m) or greater from
      the foundation to the property line of the adjacent lot;
   b) that terminates into a side yard which measures not less than 4 ft (1.2 m), and
      not greater than 8 ft (2.4 m), from the foundation wall to the property line of the
      adjacent lot, shall have a means of redirecting the vent plume with a certiﬁed
      ﬁtting such as a tee, a 90 degree elbow or a termination acceptable to the
      Authority Having Jurisdiction, installed in accordance with the manufacturer's
      installation instructions; and
   c) that terminates into a side yard which measures greater than 8 ft (2.4 m), from
      the foundation wall to the property line of the adjacent lot will not require
      redirection.

   Note: The above requirements do not apply to locations where adjoining properties are
   public spaces such as roadways, alleyways, walkways or parks where structures would
   not normally be erected. All installations are subject to CSA B149.1:25 Clause 8.14.8(a)
   and TSASK CSA B149.1:25 Interpretations Clause 8.14.15.




                                                                          P a g e 31 | 35
8.14.15 Ice and frost
In all appliance installations the vent shall not be installed so that ice and frost can
accumulate and have the potential to cause damage to property.

Rationale: The intent of 8.14.8, 8.14.14, and 8.14.15 is to provide dimensional detail of
vent terminations to prevent frost and ice accumulations on adjacent surfaces.




                                                                            P a g e 32 | 35
Appendix A - Installation of piping or tubing in rocky
areas
Where, due to rocky terrain, it is impractical to comply with section 6.15.4 (a), piping or
tubing systems may be installed in accordance with this Appendix, the manufacturer's
instructions and the Authority Having Jurisdiction.

   1) When piping or tubing cannot be buried a minimum of 15 in due to rocky terrain,
      Type L polyethylene-coated copper tubing, or polyethylene (PE) piping, sleeved
      using high-density polyethylene tubing that contains a minimum 2% UV
      resistance by weight, may be used in accordance with this document and the
      manufacturer's instructions.
   2) Tubing shall be installed without joints unless the required distance is beyond
      100 ft. Tubing shall be joined or connected in accordance with CSA B149.1:25
      Clause 6.15.3 and the sleeve shall be connected in accordance with the
      manufacturer's instructions.
   3) Measures shall be taken to ensure that the pipe or tubing is protected from
      damage from vehicles, snow machines etc. (see CSA B149.1:25 Clause 6.16.3)
   4) Where ground cover is not possible,
      a) above ground sections of the tubing sleeve shall be anchored to the contour
          of a secure rock surface at minimum 10 ft intervals. The sleeve shall be
          banded every 3 feet with a high visibility yellow tape; or
      b) piping shall follow the contour of the terrain without unsupported sections of
          pipe or tubing occurring above grade.
   5) The PVC tubing sleeve is to be sealed at each end to prevent the entrance of dirt
      and moisture.
   6) A trench for underground sections of the tubing shall be in compliance with CSA
      B149.1:25 Clause 6.15.5. The backﬁll material shall be free of sharp objects,
      stones larger than 38 mm, or any other material that may damage the piping or
      tubing.
   7) Permanent markers (yellow with black writing) shall be placed along the
      piping/tubing system every 10 ft warning that the piping/tubing is part of a
      natural gas or propane system; and when installed on rock, the signs shall be
      anchored to the rock.
   8) Permanent markers (yellow with black writing) are to be placed at the natural gas
      meter or propane container, and building, or outdoor appliance, warning of a
      shallow underground propane/natural gas piping or tubing system.




                                                                           P a g e 33 | 35
   9) The markers referred to in 7) and 8) shall be of a height above the anticipated
       snow level for the area.
   10) The polyethylene (PE) material being used as protective sleeves shall conform
       with the standard CGSB 41-GP-25M and shall contain a minimum 2% content of
       carbon black additive, which gives the product essentially a 50 year life cycle for
       resistance to UV rays from the sun.
   11) A plan review application to Gas Inspections must be completed and approved
       prior to installation.




Appendix B - Landslide reference
Speciﬁcations for service lines that run through fault lines in active landslide areas in
Saskatchewan (as applied to new services and existing service locations).



   1) All service line designs through fault lines in active landslide areas in
      Saskatchewan require consultation with the local gas inspector on site to review
      all matters related to a safe design given speciﬁc local terrain considerations.
      Only after consultation and an approved design is documented shall construction
      commence.
   2) The permitted operating pressure is 7 in wc (4 oz/inch²) only.
   3) All below ground service line piping shall be polyethylene (PE), minimum
      diameter 1-1/4 in, joined using butt or socket fusion (including electrofusion)
      means only. No mechanical joining methods are permitted below ground.
   4) Use anodeless risers for all risers. Tracer wire is to be terminated above ground
      at all risers.
   5) A means of leak migration control shall be installed by either:
      a) lining the bottom of the entire service line trench using a "pea gravel" bedding
          with a minimum 6 in depth for the width of the trench. ("Pea gravel" shall
          consist of small, rounded stones as used in concrete surfaces); or
      b) installing the service line in a continuous polyethylene (PE) sleeve from riser
          to riser. Sleeves shall be kept to the smallest diameter practical to permit
          insertion of the carrier pipe. The allowable joining methods for PE sleeves are
          the same as those for the carrier pipe, as noted in item 3) above.
   6) Piping risers shall be sleeved using non-metallic piping with a diameter the
      smallest size practical and shall extend from the horizontal section of the




                                                                           P a g e 34 | 35
    underground line to 12 in (300 mm) above grade to provide for ventilation of the
    underground line.
7) Approved ﬂexible connections shall be installed to connect from meter to riser, or
    from riser to riser, or from riser to service. These ﬂexible connections may
    consist of either one of the following two designs:
    a) the scissor swing as detailed in the TSASK CSA B149.1:25 Interpretation
        Clause 6.15.19; or
    b) a stainless steel braided reinforced gas hose, certiﬁed CSA 8.1 Type II or Type
        III, with a minimum diameter of 1-1/4 in and with a minimum length of 4 ft.
8) At the time of installation, scissor swing installations shall be installed such that
    all sections of the scissor swing are either vertical, or level, as appropriate. At the
    time of installation, hose ﬂexible connections shall be installed such that the
    hose end connections are level with each other, and as close as practicable to
    each other, with the hose slack (droop) above grade contact. The initial spacing
    between hose end connections shall be measured and recorded with a
    permanent (UV resistant) marking or tag fastened to the hose.
9) The minimum number of ﬂexible connections on a service line shall be two with:
    a) the ﬁrst ﬂexible connection required at the meter stand prior to the
        underground riser; and
    b) the second ﬂexible connection is as close as practical to the fault line and
        downstream of the fault line. Consideration shall be given to locating the
        second ﬂexible connection on the service riser when and where warranted by
        distance and other local terrain considerations.
10) The service line crossing of the fault line may be buried if the fault line appears
    passive with little or no signs of recent or impending movement. Consideration
    shall be given to crossing the fault line above ground where the fault line appears
    active with recognizable signs of recent or impending movement. The
    determination of above or below ground crossing of the fault line shall be made
    during the design on site consultation with the gas inspector.
11) When the second ﬂexible connection [either design as noted in item 7) above] is
    installed at a remote riser to riser location adjacent to the fault line and between
    the meter and the service riser, then the service riser requires termination to a
    normal (vertical movement only) riser at a minimum. In severe cases of active
    movement, a third ﬂexible connection [item 7)] may be deemed necessary by the
    gas inspector.
12) Consideration shall be given to removing the operator handle on the dealer valve
    and/or isolation valves located at the meter due to its public and remote location.
    In all cases, a ¼ turn shut-off valve is required at the service riser.




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