Weil-McLain WM97+110, Manual, Page: 21 / 132

Part number 550-142-085/0712
– 21 –
WM97+
gas
-
fired water boiler
— Boiler Manual
Venting & air — general
(cont.)
Figure 18
Vent and air piping materials — Use only the materials listed below, ensuring that all materials meet
local codes (see Figure 119, page 117 for part/kit numbers)
Item Material
Standards for installations in:
United States Canada
Plastic piping materials
Vent or air pipe
&
fittings
PVC schedule 40 ANSI/ASTM D1785
Plastic vent pipe must be certified to
ULC S636 if required. (Note 2)
Air pipe can be any of those listed at
left if acceptable for local codes.
PVC-DWV schedule 40 (Note 1) ANSI/ASTM D2665
CPVC schedule 40 (Note 1) ANSI/ASTM F441
PVC & ABS pipe
cement & primer
PVC ANSI/ASTM D2564/F656
CPVC (Note 1) ANSI/ASTM F493
Polypropylene
vent pipe, fittings,
terminations and
cement
Simpson-Duravent —
Obtain all materials from M&G
Simpson-Duravent
Centrotherm Eco Systems InnoFlue® Single-wall
—
Obtain all materials from Centrotherm
See manufacturer’s literature for
detailed information
MUST USE LOCKING
COLLAR ON EVERY JOINT
ULC S636
AL29-4C stainless steel piping materials
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
Centrotherm Eco Systems — InnoFlue®
Certified for Category IV and
direct vent appliance venting
Certified for Category IV and direct vent
appliance venting
Weil-McLain stainless steel bird screens, 2” or 3” (purchase separately) — see Figure 119, page 117 for part numbers
Note 1: Weil-McLain concentric vent kits are made from PVC
pipe and fittings.
Note 2: IPEX PVC concentric terminations utilize PVC pipe/
fittings certified to ULC S636.
If ULC S636 compliance is required, use only IPEX
System 636 pipe, fittings and cement.
DO NOT mix piping from different pipe manufacturers
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 pipe.
ADAPTERS — AL29-4C piping — Install a PVC-to-
stainless adapter supplied by the AL29-4C stainless
pipe manufacturer at the 3” PVC boiler vent connection
and at the termination (if using Weil-McLain plate or
concentric PVC termination).
ADAPTERS — Polypropylene piping — Provide adapt-
ers from polypropylene pipe to the 3” PVC connections
at the boiler and at terminations, if required (Weil-
McLain sidewall plate, for example).
ADAPTERS — If using 2” piping, where approved for
the application, provide adapters for the 3” PVC boiler
connections and at the terminations, if required (Weil-
McLain sidewall plate, for example)
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, supplied standard with all WM97+ boilers. No additional screening is required.]
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.