lp-505 Rev. 000 Rel. 015 Date 1.7.20
25
1. Installation should be made in accordance with the regulations of
the Authority Having Jurisdiction, local code authorities, and utility
companies which pertain to this type of water heating equipment.
2. Install the venting system in accordance with these instructions
and with the National Fuel Gas Code, ANSI Z223.1/NFPA 54, CAN/CGA
B149, and / or applicable provisions of local building codes.
3. This water heater must be vented with materials, components, and
systems listed and approved for Category IV appliances.
NOTE: To avoid contamination often contained in indoor air, it is best
to pipe all intake combustion air directly to the outdoors.
NOTE: Care must be taken to prevent condensate freezing in the
exhaust vent pipe system. See local, state, provincial, and national
codes for best practices to prevent condensate freezing in the exhaust
vent pipe system.
Due to the extreme ammability of most glues, cements, solvents,
and primers used to join plastic exhaust vent and intake pipes,
explosive solvent vapors must be cleared from all vent piping
before start-up. Avoid using excess cement or primer, as this may
pool in the vent pipes. Vent assemblies should be allowed to
cure for a period of at least 8 hours before powering a connected
appliance. Failure to follow these instructions will result in
substantial property damage, severe personal injury, or death. It is
the installers’ responsibility to understand the hazards associated
with explosive solvents and take the necessary precautions to
avoid these risks.
B. Approved Materials for Exhaust Vent and Intake Pipe
Table 14 - Approved Materials for Exhaust Vent and Intake Pipe
Exhaust vent adaptors are not designed as load-bearing devices,
and must not be used to support exhaust vent piping. All vent
pipes must be properly connected, supported, and the exhaust
vent must be pitched a minimum of 1/4” per foot back to the heater
to allow drainage of condensate. Failure to properly support vent
piping and follow the information in this statement could result in
product damage, severe personal injury, or death.
Improper seating of vent pipe gaskets can cause eventual gasket
failure and exhaust gas leakage. Ensure the exhaust vent pipe is
properly beveled and seated before insertion into the ue adapter.
Failure to do so could result in property damage, severe personal
injury, or death.
• The exhaust and intake components installed with this appliance must be used for near appliance piping BEFORE transitioning to
the approved materials listed above. DO NOT REMOVE these installed components. Doing so WILL VOID appliance warranty.
• PVC / CPVC pipe and ttings of the same diameter are considered interchangeable.
• The use of cellular core PVC (ASTM F891), cellular core CPVC, or Radel
®
(polyphenolsulfone) in non-metallic venting systems is
prohibited.
• Covering non-metallic vent pipe and ttings with thermal insulation is prohibited.
• DO NOT connect PVC/CPVC to Polypropylene without an approved vent connector.
• Any transition to Polypropylene MUST be done in the vertical within ve (5) feet of the appliance.
• When installing AL29-4C vent piping, install a PVC-to-stainless adapter at the appliance 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 or insulated material 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 Certied.
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 Certied 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 Certied.
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
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