18
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Fig. 25c
Fig. 25d
Fig.25b
Fig. 25a
Plumbers Tape
On Four Sides
Equally Spaced
For Supplemental
Support
Storm Collar
Flashing
Model BV
Type B Gas
Vent
DuraConnect II -
Used As a Flexible
Segment of Type B
Gas Vent System -
DO NOT ENCLOSE
3” Minimum B-Vent
Above Floor Joist
Or 1” Above Attic
Insulation Shield
(Where Required)
*
3” Minimum B-Vent
Plate Support
Assembly Or Firestop If
Adequately Supported
Below
Model BV Type B Gas Vent
DuraCap Cap
Sheet Metal Plate Attached
To Bottom Side Of Roof Joist.
Plate Trimmed To Accommodate
B-Vent And Create 2 Tabs For
Attaching To Pipe.
Trimmed Plate
Attachment Tabs (One 1/4”
Sheet Metal Screw Per Tab)
Three 1/4” Sheet Metal
Screws Through Snout Of
Flashing Into Outer Wall
Of B-Vent.
Two Strips Of Plumbers Tape
Installed As Shown. Secure
Tape To Roof Joist.
One 1/4” Sheet Metal
Screw To Attach Each
Plumbers Tape To B-Vent
Two Metal Brackets Installed
As Shown. Secure Metal
Brackets To Roof Joist.
One 1/4” Sheet Metal
Screw To Attach Each
Bracket To B-Vent
Roof Joist
Fig. 25
NOTE: In Canada DuraConnect II is NOT
Permitted in an attic space (Figures 25, 25a
to 25e).
Roof Joist
Roof Joist
Roof Joist
Fig. 25e
Roof Joist
Sheet Metal Plate Attached
To Top Side Of Roof
Joist. Plate Trimmed To
Accommodate B-Vent And
Create 2 Tabs For Attaching
To Pipe.
Trimmed Plate
Attachment Tabs (One
1/4” Sheet Metal Screw
Per Tab)