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INSTRUCTIONS WHEN OFFSET OF CHIMNEY IS
NEEDED TO INSTALL ELBOWS
1. To achieve desired offset, you may install combinations of 12",
18", 36", and 48" lengths of double wall pipe (See Rise and Off-
sets Chart and Figures 9 and 11).
2. Chimney weight above offset rests on return elbow. Straps must
be securely nailed to rafter or joists (see Figure 10 and Details A
& B).
3. Maximum length of pipe between supports (return elbow or
V12S-8DM) is 6' of angled run. Maximum of two (2) 6' angled
run section per chimney system (Figure 11).
6 ft.
max.
Figure 9
A
OFFSET
ELBOW
RETURN
ELBOW
OFFSET
ELBOW
Figure 11
B
RETURN
ELBOW
6' MAX
OFFSET
ELBOW
6' MAX
OFFSET
ELBOW
A
RISE AND OFFSETS
A
B
48 36 18 12
4
3
/
16
3
/
8
8
9
3
/
25
1
/
4
2
3
3
12
/
30
/
4
4
3
15
34
/
4
18
40
21
1
/
46
1
/
1
4
4
3
1
23
/
49
/
4
4
3
3
27
/
56
/
1
4
4
30
60
3
/
1
4
33
66
1
36
71
1
1
38
/
75
2
4
NOTE: ANY OFFSET
GREATER THAN 6 FEET YOU
MUST USE A V12S-8DM.
CEILING
SUPPORT
PIPE
V12S-8DM
DETAIL B
RETURN
DETAIL A
Figure 10
RETURN
ELBOW
6' MAX
RETURN
ELBOW
6' MAX
OFFSET
ELBOW
B
4
A
B
48
36 18 12 12S
41
1
/
80
1
/
1
4
4
1
45
86
3
/
2
4
3
1
1
46
/
89
/
1
4
2
2
51
97
1
1
1
1 53
1
/
101
2
4
56
1
/
106
1
/
2
4
4
1
1
1
2 59
/
111
/
1
1
4
2
3
1
61
/
115
/
2
4
2
1
64
3
/
120
3
/
2
4
4
1 68
1
/
127
1
2
4
1
70
130
2
1
1
74
/
137
/
1
2
4
2
76
3
/
141
1
/
1
2
4
2
79
3
/
146
3
/
4
4
4
2"
MINIMUM
ANGLE
FIRESTOP
ELBOW
INSTALL SUPPORT 12S-8DM
AT 30 FT. LEVEL
CEILING
SUPPORT
PIPE
V12S-8DM
6' MAX
6' MAX
C
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
SEE
DETAIL A
SEE
DETAIL B
RETURN
ELBOW
55508
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