Payne PG9MAB Series A Installation Manual page 45

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7. After pipes have been cut and preassembled, apply generous layer of cement primer to pipe fitting socket and end of pipe to insertion mark.
Quickly apply approved cement to end of pipe and fitting socket (over primer). Apply cement in a light, uniform coat on inside of socket
to prevent buildup of excess cement. Apply second coat.
8. While cement is still wet, twist pipe into socket with 1/4 turn. Be sure pipe is fully inserted into fitting socket.
9. Wipe excess cement from joint. A continuous bead of cement will be visible around perimeter of a properly made joint.
Roof Termination (Preferred)
At least 36 in.
Vertical separation
between combustion
air and vent
8 3/4 in. for 3 in. kit
18 in. maximum
6 3/4 in. for 2 in. kit
Maintain 12 in. min.
clearance above
highest anticipated
snow level
Maximum of 24 in.
above roof
Note: "A" denotes 0 to < 2 in.
90°
Fig. 41—Combustion Air and Vent Pipe Termination
for Direct Vent (2-Pipe) System (All Sizes)
Roof Termination (Preferred)
Maintain 12 in.
minimum clearance
above highest anticipated
snow level maximum of
24 in. above roof.
Side wall termination
with 2 elbows (preferred)
Fig. 42—Vent Pipe Termination for Non-Direct
Vent (1-pipe) System (Sizes 040 Through 120 Only)
A
Abandoned masonry
used as raceway
(per code)
12 in. min from
overhang or roof
12 in. separation
between bottom of
combustion air and
A
bottom of vent
Maintain 12 in.
min. clearance above
highest anticipated
snow level or grade
whichever is greater
Vent
Abandoned masonry
used as raceway
(per code)
between wall and end of vent pipe.
10 in. maximum pipe length
12 in. min. from
overhang or roof
90°
Maintain 12 in.
minimum clearance
above highest anticipated
snow level or grade
whichever is greater.
—45—
Concentric Vent and Combustion Air
Roof Termination (preferred)
A
At least
36 in.
A
At least 36 in.
Side wall termination
of less than 12 in.
12 in. min. from
overhang or roof
6 in. minimum clearance
Maintain 12 in.
minimum clearance
above highest anticipated
snow level or grade
whichever is greater
Sidewall Termination
with Straight Pipe (preferred)
in.
Maintain 12
min. clearance above
highest anticipated
snow level, maximum of
24 in. above roof
1 in. maximum (type)
12 in. minimum from
overhang or roof
A
Maintain 12 in.
min. clearance above
highest anticipated
snow level or grade
whichever is greater
Concentric Vent
and Combustion - Air
Side Termination
A05090
A05091