16
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
1) Determine the approximate length and the
path of the connector required to attach to
the B-Vent system and the appliance being
vented.
2) Select a length or lengths of flexible
connector sufficient to extend from the Type
B Gas Vent (which should be protruding into
the appliance room) to the appliance to be
connected. If the inlet of the existing Type
B Gas Vent system is not compatible with
the male end of the flexible connector, use a
Model BV Universal Female B-Vent Adapter
or a Universal Female Flexible Connector
which are UL Listed and designed to adapt to
most manufacturer’s Type B Gas Vent (See
Section 3). Insert the outlet (male) end of the
Flexible Adapter into the inlet of the gas vent
until it fully engages. Use #8x1/4” sheet metal
screws to secure in place. (See Figure 19).
3) If local codes specify use of a “drip tee”, a
fixed adjustable wye or a tee may be included
to make the connection to the B-Vent.
DuraConnect II may also be used to connect
to the round inlet of Model BVO oval B-Vent
tee if desired (See Figures 22 and 23).
4) Once securely attached to the B-Vent,
gently bend the flexible connector in the
direction of the appliance to which it will be
attached. (Be careful not to make any abrupt
or sharp bends or create any bends greater
than 90 degrees).
5) Attach the inlet (female) end of the flexible
connector directly to the appliance draft hood
or flue collar (if conditions and local codes
permit). If necessary, a draft hood connector
may be used between the draft hood/flue
collar and the connector inlet.
6) If the flexible connector is too long, do
not cut to length. Instead, compress it to an
appropriate length as noted in Figure 20.
7) After making final connections, check the
system for soundness of joint attachment
and proper 1” (25mm) airspace clearance-
to-combustibles. Install Wall Support Straps
as necessary to eliminate sags and/or assure
proper clearances.
DuraConnect II as a Vent Connector -
Multiple Appliance System
1) To common vent (connect to more than one
appliance), select and install a fixed wye or
tee at the base (inlet) of the Type B Gas Vent
system, along with appropriate increasers
(if necessary) at the inlets. (See Figure 24).
2) Remember to reference the National Fuel
Gas Code (NFPA 54) and Canadian Gas Fuel
Installation Code (CSA-B149.1.00) and/or
local code requirements to obtain the correct
sizes for the connectors and common vent.
3) After selecting and installing the appropriate
tee or wye assembly at the inlet of the gas
vent, connection of the individual appliances
is accomplished in the same manner as
described above for a single appliance
connector system.
AFTER COMPLETING INSTALLATION
OF CONNECTOR AND VENT SYSTEM,
CHECK FOR PROPER VENT OPERATION.
REFER TO GAS VENT INSTALLATION
INSTRUCTIONS AND/OR Z223.1/NFPA 54
AND/OR CSA-B149.1.00 FOR GUIDELINES
ON HOW TO CHECK FOR PROPER
OPERATION.
PART 2
DuraConnect II as an Unenclosed Segment
of a Type B Gas Vent System in Attics or
Crawl Spaces - UNITED STATES ONLY!
DuraConnect II may be used as a segment
of a standard Type B Gas Vent installation
in attics or crawl spaces (only) provided
the installation complies with the following
criteria.
1.) DuraConnect II must never pass through
or penetrate a wall, ceiling, floor or roof joist.
(Such is to be done only with rigid lengths
of B-Vent).
2.) DuraConnect II must never be fully
enclosed.
3.) If installed in an attic, the B-Vent
portion, penetrating the attic floor (to which
DuraConnect II will be attached) must extend
a minimum of three inches above the attic
floor. Note: In Canada, DuraConnect II
cannot be installed in an attic or crawl space.
4.) If installed in an attic, the B-Vent portion
attached above DuraConnect II must be
supported and stabilized using the method
detailed in Figure 25 or by other generic
methods as shown in Figures 25a through
25e.
PART 1
DuraConnect II as a Vent Connector -
Single Appliance System
Use sheet metal screws as necessary to
securely fasten flexible length or draft hood
connector to the appliance outlet.
