LP-293 Rev. 9.24.15
25
B. Approved Materials for Exhaust Vent and Intake Pipe
Item Material
Standards for Installation In:
United States Canada
Exhaust Vent or Intake
Pipe and Fittings
PVC Schedule 40/80 ANSI / ASTM D1785
PVC, CPVC, and PP Venting Must
be ULC-S636 Certied. IPEX is
an approved manufacturer in
Canada.
PVC-DWV* ANSI / ASTM D2665
CPVC Schedule 40/80 ANSI / ASTM F441
Polypropylene UL-1738
Stainless Steel AL29-4C Certied for Category IV and Direct Vent Appliance Venting
Pipe Cement / Primer
PVC ANSI / ASTM D2564
IPEX System 636 Cements and
Primers
CPVC ANSI / ASTM F493
• The exhaust and intake components installed with this boiler must be used for near boiler piping BEFORE transitioning to
the approved materials listed above. DO NOT REMOVE these installed components. Doing so WILL VOID boiler warranty.
• PVC / CPVC pipe and ttings of the same diameter are considered interchangeable.
• DO NOT use Foam Core Pipe in any portion of the exhaust piping from this boiler.
• DO NOT connect PVC / CPVC to PP without an approved vent connector.
• When installing AL29-4C vent piping, install a PVC-to-stainless adapter at the boiler vent connection, and at the
termination when using a PVC termination kit. DO NOT mix AL29-4C piping from dierent manufacturers unless using
adapters specically designed for the purpose by the manufacturer.
• A double wall vent may be used when using stainless steel vent material in a freezing climate.
• *PVC-DWV may be used for air intake applications ONLY.
• Contact the venting material manufacturer if there is any question about the applicability of the proposed venting
material.
Failure to follow these directions will result in substantial property damage, severe personal injury, or death.
Table 9 - Approved Materials for Exhaust Vent and Intake Pipe
C. Additional Requirements for Installation in Canada
1. Installations must be made with a vent pipe system certied
to ULC-S636. IPEX is an approved vent manufacturer in Canada
supplying vent material listed to ULC-S636. Additionally,
you may use AL29-4C stainless steel venting to comply with
Canadian requirements.
2. The rst three (3) feet of vent pipe from the boiler ue outlet
must be readily accessible for visual inspection.
3. The components of the certied vent system must not be
interchanged with other vent systems or unlisted pipe / ttings.
Cellular foam core piping may be used on air inlet piping only.
DO NOT mix components from dierent venting systems
without proper adapters. The vent system could fail, causing
leakage of ue products into the living space. Use only the
approved pipe and tting materials, and primer and cement
specically designed for the material used, as listed in the
above table. Failure to do so could result in property damage,
serious injury, or death.
High heat sources (generating heat 100
o
F / 37
o
C or greater,
such as boiler ue pipes, space heaters, etc.) may damage
plastic components of the boiler as well as plastic vent pipe
materials. Such damages ARE NOT covered by warranty. It is
recommended to keep a minimum clearance of 8” from high
heat sources. Observe heat source manufacturer instructions,
as well as local, state, provincial, and national codes, laws,
regulations, and ordinances when installing this boiler and
related components near high heat sources.
NOTE: The use of double-wall vent or insulated material for
the combustion air intake pipe is recommended in cold cli-
mates to prevent the condensation of airborne moisture in
the incoming combustion air.
You must not use “B” vent in an exhaust application. “B” vent
is for intake applications ONLY. Using “B” vent in an exhaust
application will result in serious injury or death.
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