21
110332-04 - 2/23
PHTM II
Installation, Operating & Service Instructions
Boiler
66" Min
(168cm)
One end of
opening may
be closed
PVC Vent Pipe
Wall
*Wall must be of non-combustible construction
Maximum Wall
Thickness ("T")
Minimum air space
around pipe ("C")
2"*
(50mm)
6"
(150mm)
12"
(305mm)
0"*
(0mm)
1"
(25mm)
1-3/4"
(45mm)
"C"
"T"
Length of straight run
between anchors ("X")
Loop
(horizontal only)
(top view)
Y/5
6" (150mm)
Min
6" (150mm)
Min
2Y/5
7
General Venting
(continued)
Figure 7-15: CPVC/PVC Venting Expansion Loops
Figure 7-14: PVC Venting Wall Penetration Clearance
Key
Hanger (allows linear movement)
Anchor (restricts linear movement)
Can use either anchor or hanger
Pipe Dia., in.
X, ft. (m)
Y, in. (cm)
2
20 (6.1)
41 (104)
30 (9.1)
50 (127)
40 (12.2)
58 (147)
50 (15.2)
65 (165)
60 (18.3)
71 (180)
3
20 (6.1)
50 (127)
30 (9.1)
61 (155)
40 (12.2)
70 (178)
50 (15.2)
79 (201)
60 (18.3)
86 (218)
