DuraVent DuraConnect - Manual (Page 5)

5
CONNECTOR PIPE
DuraConnect & DuraConnect II flexible
systems should be installed in as
short and straight a run as possible. In
accordance with NFPA 211, the appliance
should be located as close as possible
to the vent or chimney. DuraConnect
& DuraConnect II should be installed
without any dips or sags, shall have no
bends greater than 90 degrees, and shall
slope upwards at least 1/4" per foot.
Joints between sections of connector
pipe, as well as joints between pipe
and fittings need not be fastened with
screws, and can be connected by the
DuraConnect & DuraConnect II twist-lock
system.
The vent connector shall be firmly
attached to the draft hood outlets or
flue collars by sheet metal screws or
other approved means. The flexible
connector may be directly attached
to the appliance, or you may use the
DuraConnect appliance connector.
The DuraConnect & DuraConnect II
flexible sections are adjustable in length,
providing up to 4 inches per foot of
compression. (Zero stretch). Do not cut
the flexible pipe. Compress the flexible
pipe by setting the female end on the
floor, grabbing the pipe approximately
12 inches from the female end, and
pressing down, compressing the pipe to
the desired length.
Warning: do not substitute light
gauge aluminum flex such as dryer
vent, air duct, or chimney relining
materials.
CLEARANCES
The DuraConnect & DuraConnect
II systems are UL listed as flexible
connectors with clearances of 1
inch to combustible materials. The
DuraConnect & DuraConnect II systems
may be installed at a minimum of 1 inch
clearance to both walls and ceilings.
DuraConnect & DuraConnect II systems
are approved for installations located in
small furnace rooms, "closets", as well as
in open areas such as garages.
Due to the high rigidity and natural
"spring back" qualities of the
DuraConnect & DuraConnect II
systems heavy duty flex, no spacers or
wall supports are normally required
providing the connector is installed
at a minimum of 1 inch clearance to
combustibles. However, it is important to
check the final installation to determine
if a reasonable force could deflect the
connector to a fixed position less than
1/4 inch from nearby combustibles
such as walls, rafters, or framing. If so,
DuraConnect wall supports should
be installed so as to prevent this close
clearance condition.
FITTINGS
For retro-fit applications, a new
appliance may be connected to an
existing brand of gas vent previously
installed in the wall or ceiling, by use
of a DuraConnect adapter or a B-vent
adapter for DuraConnect II. These
adapters convert competitive brands
of gas vent to the DuraConnect &
DuraConnect II twist-lock connection.
The Type B gas vent chimney may be
installed with a DuraConnect round
support, or as a low-cost alternative, with
a wall strap. When using a wall strap,
most Building Codes require installation