Install Instructions
The Upper Support Plate (with a ange for 
BVent and factory built chimney, Fig.17) 
must be axed to the top of the conduit 
via screws. Anchor bolts must be used 
when attaching a at support plate to the 
top of masonry or other chase (not shown). 
Support plate must be weather tight. The 
SS hanger bracket is installed under the 
gasket plate and axed to the top of the 
support plate with screws (Fig.17). Use non-
hardening sealant as required.
The lower portion of the vent system must 
be supported and restopped per applicable 
DuraVent instruction.
If there are multiple osets in the conduit 
or a rigid Polypro install proves to be too 
challenging, PolyPro Flex is an acceptable 
replacement in the US. Refer to PolyPro Flex 
installation instructions for details on how to 
install.
Figure 17
HANGER 
MOUNTED 
TO TOP OF 
SUPPORT, 
BELOW 
GASKET 
PLATE
SEAL AS 
REQ'D
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