Table of Contents
Advertisement
INSTALLATION
Table 7: Plas c Vent Pipe Table
Item
Exhaust pipe and
Fi ngs
Pipe Cement/Primer
Use of cellular core PVC (ASTM F891), cellular core CPVC, or Radel® (polyphenylsulfone) in non-metallic ven ng systems is prohibited.
Covering non-metallic vent pipe and fi ngs with thermal insula on is prohibited.
NOTE: Approved vent and air intake Polypropylene vent materials: Centrotherm InnoFlue® Single Wall Vent System
Table 8: Vent Pipe Lengths
No. of
Elbows
0
1
2
3
4
5
Excludes vent terminators, termina on elbows, or rain caps.
For details on the vent connec on, refer to "Installing the Vent Pipe." on page 23.
For each 90 degree elbow added, deduct 5 . 45 degree elbows count as 2.5 feet.
22 • Residen al Gas Tankless Water Heater Use and Care Guide
Material
Schedule 40 PVC
PVC-DWV
Schedule 40 CPVC
Schedule 40 ABS-DWV
Polypropylene
PVC
CPVC
ABS
Max. Ver cal or Horizontal (Total) Vent Length
2" ven ng
75
(22.9 m)
70
(21.3 m)
65
(19.8 m)
60
(18.3 m)
55
(16.8 m)
50
(15.2 m)
United States
ANSI/ASTM D1785
ANSI/ASTM D2665
ANSI/ASTM F441
ANSI/ASTM D2661
UL-1738
ANSI/ASTM D2564
ANSI/ASTM F493
ANSI/ASTM D2235
Canada
ULC S636 Cer fi ed
Materials Only
3" ven ng
150
(45.7 m)
145
(44.2 m)
140
(42.7 m)
135
(41.1 m)
130
(39.6 m)
125
(38.1 m)
Advertisement
Table of Contents
