Approved Vent Materials; Allowed Combined Vent Lengths - Westinghouse WGRT 150 Series Installation Start-Up Maintenance Parts

B. APPROVED VENT MATERIALS
Consult Table 12 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
Pipe Primer

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.

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 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 Westinghouse PVC termination kit. DO NOT mix AL29-4C piping from different manufacturers
unless using adapters specifically designed for the purpose by the manufacturer.

Covering non-metallic vent pipe and fittings with thermal insulation is prohibited.

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 12 – Approved Venting Materials
High heat sources (sources generating heat 100
components of the appliance 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 appliance 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 COMBINED VENT LENGTHS
2" COMBINED VENT LENGTH
MINIMUM
7' (2.1M)
Table 13 – Approved Vent Lengths - *NOTE: The Equivalent Vent Length for Intake or Exhaust Vent Pipe cannot exceed 50'
(15M) for 2" Pipe or 100' (30M) for 3" Pipe.
The total combined equivalent length of exhaust vent and intake pipe should not exceed one hundred (100) feet (30M) in 2" pipe, or two
hundred (200) feet (60M) in 3" pipe.
a. The equivalent lengths of friction loss in elbows are listed below:

5 feet (1.5M) for each additional 3" 90
APPROVED EXHAUST VENT AND INTAKE PIPE MATERIAL
Material
CPVC schedule 40
PVC schedule 40
Polypropylene
Stainless Steel AL29-4C
PVC
CPVC
PVC / CPVC
o
F / 37
3" COMBINED VENT LENGTH
MAXIMUM MINIMUM
100' (30M)* 7' (2.1M)
NOTICE
Standards for Installation in:
United States
ASTM-D2846
ANSI/ASTM D1785
ULC-S636, UL-1738
Certified for Category IV and
direct vent appliance venting
ANSI/ASTM D2564
ANSI/ASTM F493
ASTM F656
o
C or greater, such as stove pipes, space heaters, etc.) may damage plastic
MAXIMUM
200' (60M)*
o
elbow
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
MAXIMUM # OF 90 ELBOWS
(2" and 3" VENT DIAMETERS)
6
WHL-004 REV. 5.26.17
23