Exhaust Vent (Abs,Pvc,Cpvc, Or Polypropylene Vent) - Lochinvar 540H Installation Manual And Owner's Manual

-Exhaust vent (ABS, PVC, CPVC, or polypropylene vent)-
The Indoor models can be vented with ABS, PVC, CPVC, or polypropylene (temperature rated up to 149 °F).
Vent material certified to ULC S636 standards is recommended in the USA. In Canada, plastic venting must be
certified to ULC S636 standards.
Item
Exhaust pipe and
Fittings
Pipe Cement/Primer
Use of cellular core PVC (ASTM F891), cellular core CPVC, or Radel® (polyphenylsulfone) in
non-metallic venting systems is prohibited.
Covering non-metallic vent pipe and fittings with thermal insulation is prohibited.
• The maximum length of exhaust vent piping must not exceed 70 ft (21.3 m) for 3ʺ venting, which
depends on the elevation where the water heater is installed, and 100 ft (30.5 m) for 4ʺ venting
(deducting 5 ft (1.5 m) for each elbow used in the venting system). Do not use more than 5 elbows.
See the table below.
• When the horizontal vent run exceeds 5 ft (1.5 m), support the vent run at 3 ft (0.9 m) intervals with
overhead hangers.
Diameter
3 in
4 in
*For each elbow added, deduct 5 ft. (1.5 m) from max. vent length.
No. of
0 to 3,000 ft
Elbows*
(0 to 914 m)
0 70 ft (21.3 m)
1 65 ft (19.8 m)
2 60 ft (18.3 m)
3 55 ft (16.8 m)
4 50 ft (15.2 m)
5 45 ft (13.7 m)
Excludes vent terminators, one termination elbow, or rain caps.
For details on the vent connection, refer to pages 23 to 25.
*For each elbow added, deduct 5 ft (1.5 m) from max. vent length.
Material
Schedule 40 PVC
PVC-DWV
Schedule 40 CPVC
Schedule 40 ABS-DWV
Polypropylene
PVC
CPVC
ABS
Max. No. of Elbows Max. Vertical and Horizontal (Total) Vent Length
5
5
Vertical or Horizontal (Total) Vent Length
3" venting
3,001 to 6,000 ft
(915 to 1,829 m)
40 ft (12.2 m)
35 ft (10.7 m)
30 ft (9.1 m)
25 ft (7.6 m)
20 ft (6.1 m)
N/A
21
Page
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
70 ft (21.3 m)
100 ft (30.5 m)
6,001 to 10,100 ft
(1,830 to 3,078 m)
25 ft (7.6 m)
20 ft (6.1 m)
15 ft (4.6 m)
10 ft (3.0 m)
N/A
N/A
Installation Manual
Installation
Canada
ULC S636 Certified
Materials Only
4" venting
0 to 10,100 ft
(0 to 3,078 m)
100 ft (30.5 m)
95 ft (29.0 m)
90 ft (27.4 m)
85 ft (25.9 m)
80 ft (24.4 m)
75 ft (22.9 m)