Install Instructions (Venting)

Part number 550-100-103/1110
A–7
GAS-FIRED WATER BOILER — Manual addendum — Venting
Venting & air — general (cont.)
Figure 5 Vent and air piping materials — Use only the materials listed below, ensuring that all materials meet local codes
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 when required. (Note 2)
Air pipe can be any of those listed at
left if acceptable for local codes.
PVC-DWV (Note 1) ANSI/ASTM D2665
CPVC schedule 40 (Note 1) ANSI/ASTM F441
ABS-DWV schedule 40 (Note 1) ANSI/ASTM D2661
PVC & ABS pipe
cement & primer
PVC ANSI/ASTM D2564
CPVC (Note 1) ANSI/ASTM F493
ABS (Note 1) ANSI/ASTM D2235
AL29-4C piping materials
Vent pipe
AL29-4C
stainless
steel
Heat Fab, Inc. — Saf-T-Vent
®
Z-Flex, Inc. — Z-Vent II
Simpson Dura-Vent — FasNSeal™
Certified for Category IV and direct vent
appliance venting
Certified for Category IV and direct vent
appliance venting
Weil-McLain bird screens (purchase separately)
Weil-McLain
bird
screens
For 2” or 3” vent or air termination
(cut to size if necessary)
3” vent screen:
W-M part number 383-500-105
For 3” or 4” vent or air termination
(cut to size if necessary)
4” vent screen:
W-M part number 383-500-110
Note 1: DO NOT use DWV, CPVC or ABS when using concentric vent termination. Use ONLY PVC schedule 40.
Note 2: IPEX PVC concentric terminations utilize PVC pipe/fittings certified to ULC S636. Where ULC S636 compliance is required, use
only IPEX System 636 pipe, fittings and cement.
AL29-4C vent piping — Install a PVC-to-stainless adapter supplied by the vent pipe manufacturer at the boiler vent connection
and at the termination (when using Weil-McLain plate or concentric PVC termination). DO NOT mix piping from different vent
pipe manufacturers unless using adapters specifically designed for the purpose by the manufacturer.
Plastic piping — Do not attempt to connect different types of plastic piping together.
DO NOT use cellular core pipe.
All vent and air pipes require a bird screen at each termination where specified in the manual or vent supplement. Purchase
bird screens separately from Weil-McLain or vent kit supplier. Note that most kits do not include the screens.