lp-441 Rev. 002 Rel. 008 Date 8.23.18
17
B. Approved Materials for Exhaust Vent and Intake Pipe
DO NOT mix components from different venting systems. The
vent system could fail, causing leakage of flue products into the
living space. Use only the approved pipe and fitting materials, and
primer and cement specifically 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 flue 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 certified 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 first three (3) feet of vent pipe from the water heater flue outlet
must be readily accessible for visual inspection. 3. The components of
the certified vent system must not be interchanged with other vent
systems or unlisted pipe / fittings.
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.
It is required to insert the provided exhaust and intake screens into
the vent terminations to prevent blockage caused by debris or birds.
Failure to keep terminations clear could result in property damage,
severe personal injury, or death.
•
The exhaust and intake components installed with this water heater must be used for near water heater piping BEFORE transitioning
to the approved materials listed above. DO NOT REMOVE these installed components. Doing so WILL VOID water heater warranty.
•
PVC / CPVC pipe and fittings of the same diameter are considered interchangeable.
•
DO NOT use Foam Core Pipe in any portion of the exhaust piping from this water heater.
•
DO NOT connect PVC/CPVC to Polypropylene without an approved vent connector.
•
Any transition to Polypropylene MUST be done in the vertical within five (5) feet of the appliance.
•
When installing AL29-4C vent piping, install a PVC-to-stainless adapter at the water heater vent connection, and at the termination
when using a PVC termination kit. DO NOT mix AL29-4C piping from different manufacturers unless using adapters specifically
designed for the purpose by the manufacturer.
•
A double wall vent may be used when using stainless steel vent material in a freezing climate.
•
*ABS may be used for air intake applications ONLY. ABS is NOT PERMITTED for use in Canada.
•
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
Pipe and Fittings Approved
for Intake ONLY
ABS*
ANSI/ASTM D2661
NOT PERMITTED
Pipe Approved for
Intake OR Exhaust Vent
PVC Schedule 40/80
ANSI/ASTM D1785
PVC, CPVC, and PP Venting Must
be ULC-S636 Certified. IPEX is an
approved manufacturer in Canada.
PVC-DWV Schedule 40/80
ANSI/ASTM D2665
CPVC Schedule 40/80
ANSI/ASTM F441
Polypropylene
UL-1738 or ULC-S636
Stainless Steel AL29-4C
Certified for Category IV and Direct Vent Appliance Venting
Pipe Fittings
PVC Schedule 40
ANSI/ASTM D2466 or D2665
PVC, CPVC, and PP Venting Must
be ULC-S636 Certified. IPEX is an
approved manufacturer in Canada.
PVC Schedule 80
ANSI/ASTM D2467 or D2665
CPVC Schedule 40
ANSI/ASTM F438
CPVC Schedule 80
ANSI/ASTM F439
Pipe Cement
ABS*
ANSI/ASTM D2235
NOT PERMITTED
PVC
ANSI/ASTM D2564
IPEX System 636 Cements and
Primers
CPVC
ANSI/ASTM F493
Pipe Primer
PVC / CPVC
ASTM F656
