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AP18733 REV. 3.2.17
30
IMPORTANT
High heat sources (sources generating heat 100
°
F / 37
°
C or greater, such as stove 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.
APPROVED EXHAUST VENT AND INTAKE PIPE MATERIAL
Item Material
Standards for Installation in:
United States Canada
Exhaust vent or Intake pipe and
ttings
CPVC schedule 40 ASTM-D2846 PP, CPVC, and PVC venting must
be ULC-S636 Certied. IPEX is an
approved manufacturer in Canada,
supplying vent material listed to
ULC-S636.
PVC schedule 40 ANSI/ASTM D1785
Polypropylene ULC-S636, UL-1738
Stainless Steel AL29-4C
Certied for Category IV and direct
vent appliance venting
Certied for Category IV and direct
vent appliance venting
Pipe Cement
PVC ANSI/ASTM D2564
IPEX System 636 Cements &
Primers
CPVC ANSI/ASTM F493
Pipe Primer PVC / CPVC ASTM F656
DANGER
• 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 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 water heater vent connection, and at the termination when
using a Rheem PVC termination kit. DO NOT mix AL29-4C piping from different manufacturers unless using adapters specically designed
for the purpose by the manufacturer.
• Covering non-metallic vent pipe and ttings with thermal insulation is prohibited.
• DO NOT obstruct the ow of combustion or ventilation air.
• When using Pipe Cement/Primer, follow the instructions included with the Cement/Primer closely. Clean and dry all applicable surfaces
before applying.
Failure to follow these directions will result in substantial property damage, severe personal injury, or death.
Table 11 – Approved Venting Materials
WARNING
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 must be pitched a minimum of ¼" 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.
WARNING
Consult Table 11 or the most recent edition of ANSI Z223.1/NFPA 54 or CAN/CGA B149.1 as well as all applicable local codes and regulations
when selecting vent pipe materials.
▪ B. APPROVED VENT MATERIALS
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