Ultra Boiler Manual
Part number 550-100-440/0122
19
BASIC INSTALLATION
(cont.)
Figure 13 — 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
&
PVC schedule 40 ANSI/ASTM D1785/UL1738/ULC S636
Plastic vent pipe must be certied 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/ULC S636
ABS-DWV schedule 40 (Note 1) ANSI/ASTM D2661
PVC & ABS pipe
cement & primer
PVC ANSI/ASTM D2564/UL1738
CPVC (Note 1) ANSI/ASTM F493
ABS (Note 1) ANSI/ASTM D2235
Polypropylene
terminations
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 piping materials
Vent pipe
AL29-4C
stainless
steel
Heat Fab, Inc. — Saf-T-Vent
®
Z-Flex, Inc. — Z-Vent II
Simpson Dura-Vent — FasNSeal™
Certied for Category IV and direct vent
appliance venting
Certied 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/ttings certied to ULC S636. Where ULC S636 compliance is required, use only IPEX System 636 pipe, ttings
and cement. If UL1738 compliance is required, use only System 1738 pipe, ttings 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 dierent vent pipe manufacturers unless using adapters specically designed for the
purpose by the manufacturer.
Plastic piping — Do not attempt to connect dierent types of plastic piping together.
DO NOT use cellular core pipe.
All vent and air pipes require a bird screen at each termination where specied in the manual or vent supplement. Purchase bird screens separately from WM
Technologies or vent kit supplier. Note that most kits do not include the screens.
For boilers allowed to utilize polypropylene vent systems.
Tests have determined that ex 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 Vent Length - Equivalent
Duravent 2” diameter - 1 foot 3.3
Duravent 3” diameter - 1 foot 1.7
Duravent 4” diameter - 1 foot 3.0
Centrotherm 2” diameter - 1 foot 5.0
Centrotherm 3” diameter - 1 foot 2.3
Centrotherm 4” diameter - 1 foot 2.1
Example: Using 20 feet of Duravent 4” 20’ x 3.0 = 60’ of equivalent length of straight pipe.
Calculated equivalent feet shall not exceed maximum values listed in Figure12,page18.