Approved Vent Materials; Allowed Schedule 40 Vent Lengths (Pvc, Cpvc, Pp) - Westinghouse WGRTNG199 Nstallation & Maintenance Manual

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.
Item
Exhaust vent or Intake
pipe and fittings
Pipe cement/primer

This water heater has a built-in control to limit the exhaust temperature to 149

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.

When installing AL29-4C vent piping, install a PVC-to-stainless adapter at the water heater vent connection, and at the
termination when using an Westinghouse PVC termination kit. DO NOT mix AL-29-4C piping from different manufacturers
unless using adapters specifically designed for the purpose by the manufacturer.

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.
Failure to follow these directions will result in substantial property damage, severe personal injury, or death.
Table 9 – Approved Venting Materials
High heat sources (sources generating heat 100
components of the boiler 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 boiler and related components near high heat
sources.
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.
C. ALLOWED SCHEDULE 40 VENT LENGTHS (PVC, CPVC, PP)
2" COMBUSTION AIR / VENT PIPE
MAX MAX ALLOWED NUMBER OF ELBOWS
15' (4.5M)
Table 10 – Approved Vent Lengths
NOTE: When using more than 1 elbow, reduce maximum allowable length:

5 feet (1.5M) for each additional 3" 90

2.5 feet (.75M) for each additional 3" 45

8 feet (2.4M) for each additional 2" 90

4 feet (1.2M) for each additional 2" 45
APPROVED EXHAUST VENT AND INTAKE PIPE MATERIAL
Material
CPVC schedule 40
PVC schedule 40
Polypropylene
Stainless Steel AL29-4C
PVC
CPVC
o o
F / 37 C or greater, such as stove pipes, space heaters, etc.) may damage plastic
2
o
elbow
o
elbow
o
elbow
o
elbow
NOTICE
Standards for Installation in:
United States
ASTM-D2846
ANSI/ASTM D1785
ULCS636
Certified for Category IV and
direct vent appliance venting
ANSI/ASTM D2564
ANSI/ASTM F493
o
F (65
3" COMBUSTION AIR / VENT PIPE
MAX
100' (30M)
Canada
PP, CPVC, and PVC venting must be
ULC-S636 Certified. IPEX is an approved
manufacturer in Canada, supplying vent
material listed to ULC-S636.
Certified for Category IV and direct vent
appliance venting
IPEX System 636 Cements & Primers
o
C).
MAX ALLOWED NUMBER OF ELBOWS
6
WHL-004 REV. 12.17.14
18