DuraVent BV Installation Instructions Manual page 18

DuraCap Cap
Storm Collar
Flashing
3" Minimum B-Vent
Sheet Metal Plate Attached
To Bottom Side Of Roof Joist.
Plate Trimmed To Accommodate
B-Vent And Create 2 Tabs For
Attaching To Pipe.
Three 1/4" Sheet Metal
Screws Through Snout Of
Flashing Into Outer Wall
Of B-Vent.
18
Model BV
Type B Gas
Vent
Plumbers Tape
On Four Sides
Equally Spaced
For Supplemental
Support
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)
Plate Support
Assembly Or Firestop If
Adequately Supported
Below
Model BV Type B Gas Vent
Fig. 25
Trimmed Plate
Attachment Tabs (One 1/4"
Sheet Metal Screw Per Tab)
Fig. 25a
Fig.25b
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
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
Sheet Metal Plate Attached
To Top Side Of Roof
Joist. Plate Trimmed To
Accommodate B-Vent And
Create 2 Tabs For Attaching
To Pipe.
NOTE: In Canada DuraConnect II is NOT
Permitted in an attic space (Figures 25, 25a
to 25e).
Fig. 25c
Fig. 25d
Attachment Tabs (One
1/4" Sheet Metal Screw
Per Tab)
Trimmed Plate
Fig. 25e