Weil-McLain 2 Series Manual page 33

series
GV90+
Venting & air — general
Vent and air piping materials
Figure 40
Item
Vent or air pipe
&
fittings
ABS-DWV schedule 40 (Note 1)
PVC & ABS pipe
cement & primer
Polypropylene Simpson-Duravent — Obtain all materials
from
vent pipe, fittings,
M&G Simpson-Duravent
terminations and
Centrotherm Eco Systems InnoFlue®
cement
Single-wall — Obtain all materials from
Centrotherm
Vent pipe
AL29-4C
stainless
steel
Metal-Fab, Inc. — CORR/GUARD
Bird screens
Vent screen 3" : W-M part number 383-500-105
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. If UL1738 compliance is required, use only System 1738 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.
For boilers allowed to utilize polypropylene vent systems.
Tests have determined that flex vent has a greater pressure drop than rigid polypropylene vent which changes
the maximum allowable length of venting. Below are the equivalent lengths.
Supplier and Size of Flex Pipe
Duravent 2" diameter - 1 foot
Duravent 3" diameter - 1 foot
Duravent 4" diameter - 1 foot
Centrotherm 2" diameter - 1 foot
Centrotherm 3" diameter - 1 foot
Centrotherm 4" diameter - 1 foot
Example: Using 20 feet of Duravent 4"
Calculated equivalent feet shall not exceed maximum values listed in
Part number 550-143-010/1021
gas-fired water boiler – boiler manual
2
— Use only the materials listed below, ensuring that all materials meet local codes.
Material
Plastic piping materials
PVC schedule 40
PVC-DWV (Note 1)
CPVC schedule 40 (Note 1)
PVC
CPVC (Note 1)
ABS (Note 1)
AL29-4C piping materials
Heat Fab, Inc. — Saf-T-Vent ®
Z-Flex, Inc. — Z-Vent II
Dura-Vent — FasNSeal™
Weil-McLain bird screens (purchase separately)
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 Weil-McLain sidewall vent cap, supplied standard with all
GV90+ boilers. No additional screening is required.]
(cont.)
Standards for installations in:
United States
ANSI/ASTM D1785/UL1738/ULC S636
ANSI/ASTM D2665
ANSI/ASTM F441/ULC S636
ANSI/ASTM D2661
ANSI/ASTM D2564/F656/UL1738
ANSI/ASTM F493
ANSI/ASTM D2235
See manufacturer's literature for
detailed information
MUST USE LOCKING COLLAR ON
EVERY JOINT
Certified for Category IV and direct vent
appliance venting
Vent Length - Equivalent
20' x 3.0 = 60' of equivalent length of straight pipe.
Canada
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.
ULC S636
—
3.3
1.7
3.0
5.0
2.3
2.1
Figure 39, page 32.
33