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Dia.
A
B
10
5-7/8
5-3/8
12
6
5-3/8
14
6-5/8
6-1/2
16
7
18
7-9/16
7-1/2
20
8-1/2
8-5/8
8
7-5/8
22
8-5/8
8-5/16
24
9
26
9-1/2
9-1/2
28
10
10
30
Increasers
An Increaser is used to make a transition
from a smaller vent diameter to a larger vent
diameter. The Increaser is available in steps
up to a maximum of four (4) sizes larger. For
examples:
- A 10-inch diameter can be increased with a
single Increaser up to 18-inch;
- A 22-inch diameter can be increased with
a single Increaser up to 30-inch.
Tees
Tees are available from 10" to 30" and are
designed for breeching or as connectors
for vertical, sloped, or horizontal systems.
They can also be used to provide access
for inspection and cleaning. Tees must be
isolated from expansion forces by supporting
as needed and with Adjustable Length
Sections. Any unused open end of the Tee
should be closed off with a Tee Cap.
24
Maximum Offset Table in inches
With
With Two 45° Elbows and:
Two
45°
Elbows
12"
Only
7-1/4
15
7-1/4
15
8-1/2
16-1/4
7
9-1/4
17
10
17-3/4
10-1/4
18
10-1/4
18
11-1/4
19
9
12
19-3/4
12-3/4
20-1/2
13-1/2
25-1/2
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
18"
24"
36"
19-1/4
23-1/2
32
19-1/4
23-1/2
32
20-1/2
24-3/4
33-1/4
21-1/4
25-1/2
34
22
26-1/4
34-3/4
22-1/4
26-1/2
35
22-1/4
26-1/2
35
23-1/4
27-1/2
36
24
28-1/4
36-3/4
24-3/4
29
37-1/2
13-1/2
29-3/4
38-1/4
Termination of Vent Structure
Two Termination Caps are available. A High
Wind Cap is available for diameters from
10" to 18". The High Wind Cap is designed
with the same lock as the female end of
vent sections. A Universal Cap is available
in diameters of 20" to 30". The Universal
Cap is designed to fit inside of the inner wall
of vent sections. For 10" and 12" the the
terminations must terminate in accordance
with Table 1, Fig. 16B on page 14 and to Fig.
39 on page 25.
WHERE HEAVY SNOWFALL OCCURS,
THE CAP SHOULD BE INSTALLED
TO MEET THE ABOVE MINIMUM
HEIGHT REQUIREMENTS ABOVE THE
AVERAGE SNOW DEPTH.
Offset
45°
NOTE: The vertical rise can be
closely estimated by adding one
"A" and one "B" dimension to
Maximum Offset
CAUTION
Vertical
Rise
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