LP-179 Rev. 6.7.16
21
B. Approved Materials for Exhaust Vent and Intake Pipe
DO NOT mix components from dierent venting systems. 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.
Table 5 - Approved Materials for Exhaust Vent and Intake Pipe
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 water heater 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 water heater
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 climates to
prevent the condensation of airborne moisture in the incoming
combustion air.
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 water heater
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.
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.
• The exhaust and intake components installed with this heater must be used for near heater piping BEFORE transitioning
to the approved materials listed above. DO NOT REMOVE these installed components. Doing so WILL VOID heater
warranty.
• PVC / CPVC pipe and ttings of the same diameter are considered interchangeable.
• Use of cellular core pipe PVC (ASTM F891), cellular core CPVC, or Radel® (polyphenysulfone) in nonmetallic venting
systems is prohibited.
• 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 heater 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.
• Covering non-metallic vent pipe and ttings with thermal insulation is prohibited.
• 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.
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 or ULC-S636
Stainless Steel AL29-4C Certied for Category IV and Direct Vent Appliance Venting
Pipe Cement
PVC ANSI / ASTM D2564
IPEX System 636 Cements and
Primers
CPVC ANSI / ASTM F493
Pipe Primer PVC / CPVC ASTM F656