Instruction manual

Part number 550-142-056/0411
33
GWC gas-fired water boiler — Boiler Manual
Venting & air — general (cont.)
Figure 40 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
Dura-Vent — FasNSeal™
Metal-Fab, Inc. — CORR/GUARD
Certified for Category IV and direct vent
appliance venting
—
Williamson-Thermoflo bird screens (included with boiler)
Williamson-
Thermoflo
bird screens
3” bird screen:
W-T part number 383-500-105WT
(two supplied with the boiler)
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 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. Two bird
screens are supplied with each GWC boiler.