Use and Care Manual

TANKLESS WATER HEATER
B. APPROVED VENT MATERIALS
Consult Table 9 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.
Table 9 – Approved Venting Materials
• This water heater has a built-in control to limit the exhaust temperature to 149ºF (65ºC)
• 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 fittings of the same diameter are considered interchangeable.
• DO NOT use Foam Core Pipe (CPVC cellular core, Radel, etc.) in any portion of the exhaust piping
from this water heater.
• DO NOT connect PVC/CPVC to PP without an approved vent connector.
• DO NOT insulate non-metallic exhaust vent pipe or fittings.
• DO NOT obstruct the flow 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.
High heat sources (sources generating heat 100ºF / 37ºC or greater, such as
stove pipes, space heaters, etc.) may damage plastic components of the tankless
condensing water heater as well as plastic vent pipe materials. Such damages
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
Approved Exhaust Vent and Intake Pipe Material
Item Material
Standards for Installation
United States Canada
Exhaust vent or Intake
pipe and fittings
CPVC schedule 40 ASTM-D2846 PP, CPVC, and PVC, venting must
be ULC-S636 Certified. PEX is an
approved manufacturer in Canada
supplying vent material listed to
ULC-S636
PVC schedule 40 ANSI/ASTM D 1785
Polypropylene UL-1738
Stanless Steel AL 29-4C Certified for Category IV and
direct vent appliance venting
Certified for Category IV and
direct vent appliance venting
Pipe cement/primer
PVC ANSI/ASTM D 2564 IPEX System 636 Cements
& Primers
CPVC ANSI/ASTM F493
24
NOTICE
DANGER
Failure to follow these directions will result in substantial property damage, severe personal injury, or death.
CAUTION
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 tankless condensing water heater and related
components near high heat sources.
WARNING
the heater to allow drainage of condensation. Failure to properly support vent piping and follow the
information in this statement could result in product damage, severe personal injury, or death.