User guide
6
appliance manufacturer’s installations
instructions to determine the
minimum clearance from the rear of
the appliance to the wall. It is also
important to note the wall thickness.
Select the amount of vertical rise
desired or required, for “vertical-to-
horizontal” installations (verify that it
is within the appliance manufacturer’s
minimum and maximum limits). To
determine the length of vent pipe
required for vertical installations,
measure the distance from the
appliance ue outlet to the ceiling,
the ceiling thickness, the vertical rise
in an attic or second story, and allow
for sufcient vent height above the
rooine. For two-story applications,
Firestops are required at each oor/
ceiling level. If an offset is needed in
the attic, additional pipe and elbows
will be required.
Step 1. Set the gas appliance in its
desired location. Check to determine
if wall studs or roof rafters are in
the way once the venting system
is attached. If this is the case, you
may want to adjust the location of the
appliance.
Step 2. DirectVent Pro pipe and
ttings are designed with special twist-
lock connections. To connect the
venting system to the appliance ue
outlet, a twist-lock Appliance Adaptor
is required. With some brands of
appliances, the M&G DuraVent
Appliance Adaptor will be built into the
appliance at the factory. With other
brands the adaptor will be supplied
by the appliance manufacturer for
installation in the eld. Assemble the
desired combination of Pipe Sections
and Elbows to the Appliance Adaptor
(Fig. 4).
Twist-lock procedure: Line up
locking lugs on male and female ends
of pipe sections. Insert the male end
STORM
COLLAR
ROOF
FLASHING
CEILING
FIRESTOP
CATHEDRAL
CEILING
SUPPORT BOX
PIPE
SECTION
PIPE
SECTION
ROUND CEILING
SUPPORT/WALL
THIMBLE COVER
APPLIANCE
ADAPTOR
VERTICAL
HIGH WIND
TERMINATION
CAP SHOWN