DuraVent PolyPro Series Installation Instructions Manual page 12

The Upper Support Plate (with a flange for
BVent and factory built chimney, Fig.17)
must be affixed to the top of the conduit
via screws. Anchor bolts must be used
when attaching a flat 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 affixed 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 firestopped per applicable
DuraVent instruction.
If there are multiple offsets 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.
12
HANGER
MOUNTED
TO TOP OF
SUPPORT,
BELOW
GASKET
PLATE
SEAL AS
REQ'D
Figure 17