DuraVent Type B Gas Vent - Manual (Page 10)

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where the B-vent should be located, assemble
the Bucket Support and Brackets. nail the
assembly to the bottom side of the joist
material as shown in Figure 14. after the
Support Bucket is in place, scribe and cut out
a hole in the sheet rock 1/8” larger than the
diameter of the Bucket, and nail into place.
Run the pipe Sections through the hole in the
Bucket Support, connect the Duraconnect
or Duraconnect II connector, and attach the
clamp so that it rests inside the Bucket, and
will support the pipe. adjust the pipe to the
desired height and tighten the clamp. This
will provide a complete engineered support
system.
COMBINATION CAP
1. Description. The combination cap,
provides an easily installed, safe and efficient
B-Vent cap and Flashing, as one lightweight
unit. The two basic components and the
assembled unit are shown in Figure 15. The
combination cap is designed to accommodate
roof pitches from flat to 6/12, and is available
for 3” through 6” diameter B-Vent pipe.
2. Location. Locate the point in the underside
Figure 13
Figure 14
B-VEnT
BucKET
SuppORT
RaFTER 16 OR
24 IncHES O.c.
cEILInG
SInGLE-WaLL
cOnnEcTOR
(DuRa-cOnnEcT)
cOnTInuaTIOn
OF B-VEnT
naIL
HERE
TABLE 2
Gas vent systems using vent caps listed by underwriters laboratories may
terminate in accordance with this vent termination table
ROOF PITCH MINIMUM HEIGHT
FEET METERS
FLaT TO 7/12 1 0.3
OVER 7/12 TO 8/12 1.5 0.46
OVER 8/12 TO 9/12 2 0.61
OVER 9/12 TO 10/12 2.5 0.76
OVER 10/12 TO 11/12 3.25 0.99
OVER 11/12 TO 12/12 4 1.22
OVER 12/12 TO 14/12 5 1.52
OVER 14/12 TO 16/12 6 1.83
OVER 16/12 TO 18/12 7 2.13
OVER 18/12 TO 20/12 7.5 2.29
OVER 20/12 TO 21/12 8 2.44
BUCKET SUPPORT
1. Description. The Bucket Support (Figure
13) is for properly supporting the B-vent
between 16 or 24-inch O.c. joists or rafters,
or for providing a transition fitting between
Duraconnect or Duraconnect II and the B-vent
pipe Sections. a maximum of 20 feet of Type
B Gas Vent may be supported. note that the
Bucket Support must be installed prior to the
sheetrock.
2. Assembly. after you have determined
B-VEnT
MuST
EXTEnD a
MInIMuM
OF 1"
BELOW
THE
FInISHED
cEILInG