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Figure 21 Vent and air piping materials
see Figure 164, page 121 for part/kit numbers).
USE SWEEP ELBOWS FOR ALL VENT AND AIR PIPING — DO NOT use short radius
elbows for vent or air piping. Boiler performance could be affected.
Part number 550-100-325/0419
17
AquaBalance
®
Series 2 Wall Mount Gas-fired Water Boiler – Boiler Manual
6 Venting/air piping — general continued
Material
United States Canada (Note 2)
Vent or air pipe
&
ttings
PVC schedule 40 (Note 1) ANSI/ASTM D1785 ULC S636
ABS,
PVC, PVC-DWV,
CPVC or
polypropylene
PVC-DWV schedule 40 (Note 1) ANSI/ASTM D2665 NA
CPVC schedule 40 (Note 1) ANSI/ASTM F441 ULC S636
ABS-DWV schedule 40 (Intake Only) ANSI/ASTM D2661 ULC S636
PVC & ABS pipe
cement & primer
PVC (Note 1) ANSI/ASTM D2564/F656 ULC S636
Use only cement
and primer suitable
for piping material
used
CPVC (Note 1) ANSI/ASTM F493 ULC S636
ABS schedule 40 (Note 1) ANSI/ASTM D2235 ULC S636
Polypropylene
vent pipe, ttings,
terminations and
cement
Obtain all materials from
M&G Simpson-Duravent
Obtain all materials from Centrotherm
See manufacturer’s literature
for detailed information
MUST USE LOCKING
COLLAR ON EVERY JOINT
ULC S636
PVC, PVC-DWV,
CPVC or
polypropylene
Vent pipe
AL29-4C
stainless
steel
Heat Fab, Inc. — Saf-T-Vent
®
Z-Flex, Inc. — Z-Vent II
Dura-Vent — FasNSeal®
Metal-Fab, Inc. — CORR/GUARD
Certified for direct vent
appliance venting
Certified for direct vent appliance
venting
(purchase separately) — see Figure 164, page 121 for part numbers
Note 1: Weil-McLain concentric vent kits are made from PVC
pipe and fittings.
Note 2: System 636 PVC concentric terminations utilize PVC
pipe/fittings certified to ULC S636.
If ULC S636 compliance is required, use only System
636 pipe, fittings and cement.
DO NOT mix piping from different pipe manufactur-
ers unless using adapters specifically designed for
the purpose by the manufacturer.
Every joint on polypropylene vent piping must
include a locking collar.
DO NOT use cellular core PVC (ASTM F891), cellular
core CPVC, or Radel
®
(polyphenolsulfone) in venting
systems.
DO NOT cover non-metallic vent pipe and fittings
with thermal insulation.
ADAPTERS – The boiler comes with a 3”,
3-in-1 adapter as standard. This adapter allows the
installation of 3” PVC schedule 40, CPVC schedule 40,
PVC-DWV schedule 40, AL29-4C stainless steel and
Polypropylene (from Simpson-Duravent only) piping
without the need for extra adapters.
It may require an adapter at terminations.
If your venting system uses Centrotherm Eco
systems InnoFlue single wall material, then an ap-
proved adapter is required.
If using 2” piping, where approved for the ap-
plication, provide adapters for a 3” pipe material
(mentioned above) connections and at the termi-
nations, if required.
ALL vent and air pipes require a BIRD SCREEN at each termination. Most kits do not include
the bird screens. Purchase bird screens separately from Weil-McLain or vent kit supplier if
not included. [Note — bird screening is integral to the 3" PVC Weil-McLain sidewall vent cap,
available for purchase from Weil-McLain
. No additional screening is required.]
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