Install Instructions

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IV. Venting D. Stainless Steel Venting
gasket and tting installation, optional tooling
availability/usage, routing through masonry
combination of combustion product venting and
combustion air supply).
h. When there is a conict between exible
polypropylene pipe (liner) manufacturer
installation instructions and these instructions,
the more restrictive instructions shall govern.
6. Running Flexible Polypropylene Vent
(Liner) Through Unused B-Vent Chase with
integrated Intake Air
a. Models ALP080B through ALP285B are also
listed for vertical venting by installing exible
vent in an UNUSED B-Vent Chase and
supplying combustion air through B-vent exible
termination cap (terminal).
D. Stainless Steel Venting
WARNING
Asphyxiation Hazard. Follow these instructions and the installation instructions included by the original
stainless steel venting component manufacturers, Heat Fab, M&G/DuraVent or Z-Flex, whichever applicable.
Failure to do so could cause products of combustion to enter the building, resulting in severe property damage,
personal injury or death. Where a conict arises between Heat Fab, M&G/DuraVent or Z-Flex instructions
and these instructions, the more restrictive instructions shall govern.
Do not mix vent components from listed manufacturers.
Examine all components for possible shipping damage prior to installation.
All condensate that forms in the vent must be able to drain back to the boiler.
NOTICE
Do not exceed maximum vent/combustion air system length. Refer to “2. Vent/Combustion Air Piping”
under “A. General Guidelines” in this section for maximum vent/combustion air system length.
Use only vent and combustion air terminals and terminal locations shown in “3. Vent/Combustion Air
Terminals” under “A. General Guidelines” of this section.
b. Refer to Figures 16C and 16D for details of
B-Vent chase M&G/DuraVent or Centrotherm
exible vent with integrated air intake
installation.
c. Refer to Z-Flex Z-Dens and Selkirk Polyue
catalogs for component selection to address
exible vent with integrated air intake
installation.
d. All B-Vent joints must be sealed with RTV
sealant (applicable to M&G/DuraVent).
e. Seal the ex male adapter to the inside of lower
B-Vent adapter with RTV (applicable to M&G/
DuraVent).
f. Seal the air intake pipe to the B-Vent cap with
RTV (applicable to M&G/DuraVent).