M&G DuraVent DuraTech® 5-8 User Manual
Page 12
12
2 pairs of Elbows in any one chimney system.
1. Attach Elbows: Attach Elbow to Chimney
Section or other Elbow by twisting clockwise
until they lock firmly. Attach one Elbow to the
Chimney Section below, and align it for the
offset. Elbows for DuraTech have a swivel
feature that allow for 360º rotation at their base
for ease of installation. Refer to Table 3 to
determine the required offset length and attach
an appropriate length (or lengths) of Chimney
Section(s) above the Elbow. Important:
For each chimney pipe section in the offset
(between the elbows), there must be an Elbow
Figure 15
Table 3
Elbow
Angle
from
Vertical
Chimney
Length
Between
Elbows
Offset
Inches
Rise
Inches
15”
0”
2”
16 ½”
15”
6”
3 ¼”
21 ¼”
15”
12”
4 ¾”
27
15”
18”
6 ¼”
32 ¾”
15”
24”
8”
38 ½”
15”
36”
11”
50 ¼”
15”
48”
14 ¼”
61 ¾”
15”
48” + 6”
15 ½”
66 ½”
15”
48” + 12”
17”
72 ¼”
15”
48” + 18”
18 ½”
78:
15”
48” + 24”
20”
83 ¾”
30”
0”
4”
15 ¾”
30”
6”
6 ¼”
30”
12”
9 ¼”
25 ¼”
30”
18”
12 ¼”
30 ¼”
30”
24”
15 ¼”
35 ½”
30”
36”
21 ¼”
46”
30”
48”
27 ¼”
56 ¼”
30”
48” + 6”
29 ¾”
60 ½”
30”
48” + 12”
32 ¾”
65 ¾”
30”
48” + 18”
35 ¾”
71”
30”
48” + 24”
38 ¾”
76”
Strap, Tee Support, or similar support method
to support the weight of the pipe and to relieve
stress on the Elbows. Attach the second Elbow
above the Chimney Section to complete the
offset (Fig 15).
2. Secure Offset: Place the Elbow Strap’s
band around the angled portion of the top
Elbow, then tighten the nut and bolt until the
clamp is firm. Wrap the Elbow Strap end over
an adjacent joist or rafter and secure it with at
ELBOW STRAP
ELBOW
ELBOW
ELBOW STRAP
ADDITIONAL ELBOW
STRAPS REQUIRED
FOR EACH CHIMNEY
SECTION USED IN
OFFSET
RISE
(INCHES)
CHIMNEY
SECTION
OFFSET
(INCHES)
ELBOW STRAPS
OR TEE SUPPORTS
ARE REQUIRED TO
SUPPORT WEIGHT
OF OFFSET AND
TO RELIEVE
STRESS ON
ELBOWS
TWO OR MORE
CHIMNEY
SECTIONS