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110328-02 - 6/22
ALTA
Installation, Operating & Service Instructions
9
Vertical Direct Venting
(continued)
Table 9-11: Polypropylene B-vent Chase
Components
DuraVent
PolyPro
Centrotherm
InnoFlue
Selkirk PolyFlue
2PPS-VFTC
flex termination
cap + 2PPS-
BV* a
2PPS-FLEX**
flex length
IFBK02** B-vent
kit + IAWP02BP
wall plate
2PF-10UV or
2PF-39UV rigid
pipe + 2PF-
HVST
2PF-FLEX flex
2PF-
BVSC storm
collar
* Size of B-vent (in.), e.g. 2PPS-BV6 for 6 in. B-vent
** Length (25, 35, or 50 ft.) e.g. 2PPS-FLEX25 for 25
ft. length
Note: 2 in. (60 mm) components shown. Replace "2"
with "3" for 3 in. (80 mm) part numbers.
Figure 9-12: DuraVent Polypropylene B-vent Air
Chase System
PPs Flex
Fire Stop listed for
use with B-Vent
B-Vent
Duravent Polypro
Vent Pipe
B-Vent
Flashing
Normal snow
line on roof
Duravent Polypro
2PPS-VFTC or 3PPS-VFTC
Vertical Flex
Termination Cap
Air Intake Pipe
B-Vent tee with cap
and PVC thread adapter
(See Text)
Flex Male
Adapter
10'
(3.1m)
24"
(610mm)
Min
12"
(305mm)
Min
Boiler
Notes:
1. All B-Vent joints must be sealed with RTV.
2. Seal the Flex Male Adapter to the inside of the lower
B-Vent Adapter with RTV.
3. Seal the Air Intake Pipe to the B-Vent Cap with RTV.
Figure 9-13: Centrotherm Polypropylene B-vent Air
Chase System
Fire Stop listed for
use with B-Vent
PPs Flex
B-Vent
Normal snow
line on roof
B-Vent
Flashing
PVC Air Intake Pipe
B-Vent tee with cap
and PVC thread adapter
(See Text)
Centrotherm Innoflue
Vent Pipe
Base
Support
Bracket
IACGE02 or IACGE03
Gasket in B-Vent Cap
Centrotherm Innoflue
IFBK02 or IFBK03
B-Vent Kit
10'
(3.1m)
12" (305mm)
Min
24" (610mm)
Min
Boiler
Figure 9-14: Polypropylene B-vent Chase with
Sidewall Air Terminal
Duravent Polypro
2PPS-VFTC or 3PPS-VFTC
Vertical Flex
Termination Cap
B-Vent
Flashing
Normal snow
line on roof
PPs Flex
Fire Stop listed for
use with B-Vent
Duravent Polypro
Vent Pipe
Air Intake Pipe
B-Vent
Outside
Wall
Elbow
with Screen
Grade/Snow Line
Note: Duravent Polypro Flex
components shown.
12" (305mm) Min
10'
(3.1m)
24" (610mm)
Min
12" (305mm)
Min
Boiler