DuraVent PolyPro - Manuel (Page 2)

2
MULTIPLE VENTS IN ONE CONDUIT (Fig.1)
Multiple PolyPro Rigid/Flex vent systems may
be installed within one conduit. Listed 2"-4"
M&G components must be used, and the
conduit (if pre-existing) must be inspected
and deemed sound.
Upper supports may be field supplied and
listed, the listing requires: Min thickness of 24
ga (0.020") SS, no larger than 18" Dia or 18"
max length rectangle, 4 vent runs max per
support. The listing requires clearance holes
no larger than 5 1/8" Dia, with spacing 1 3/4"
apart.
The upper support plate (with a flange for
B vent and factory built chimney, Fig.2)
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.2). Use non-hardening
sealant as required.
The lower portion of the vent system must be
supported and firestopped as detailed earlier
in these and/or the PP Flex instructions
RIGID BLACK
UV PROTECTED
POLYPRO
GASKET
PLATE
STAINLESS
RELINE
HANGER
BRACKET
POLYPRO
FLEX LINER
RIGID
POLYPRO
STAINLESS
UPPER
SUPPORT
PLATE
GASKET PLATE
/ HANGER
MOUNT
HARDWARE
FLANGE
Figure 1
Figure 2
HANGER
MOUNTED
TO TOP OF
SUPPORT,
BELOW
GASKET
PLATE
SEAL AS
REQ'D
CLEARANCE
HOLE
1.75" MAT'L
SPACE MIN