NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
15
DURACONNECT II
DuraConnect II Flexible Gas Vent Connector/
Segment is an air-insulated double wall
flexible venting product with comparable
insulating value to Type B Gas Vent. Dura-
Connect II is Listed for two applications.
1. VENT CONNECTOR: May be used as
a connector for Listed gas fired appliances
equipped with draft hoods and other
appliances listed for use with Type B Gas
Vent. DuraConnect II may be used where
Type B Gas Vent Connectors are required.
(See Part 1).
2. VENT SEGMENT: DuraConnect II may be
used (unenclosed) as a segment of standard
Type B Gas Vent system in attics or crawl
spaces. (See Part 2).
DuraConnect II may be sized in accordance
with tables applicable to systems with Type
B gas vent connectors, However, DO NOT
ENCLOSE DuraConnect II.
CAUTION - RISK OF FIRE - DO NOT
ENCLOSE. INTENDED FOR USE AS A VENT
CONNECTOR OR FLEXIBLE SEGMENT
OF VENT SYSTEM FOR UNENCLOSED
PORTIONS OF INSTALLATIONS ONLY. Do
not fully enclose or pass through combustible
areas such as walls, ceilings or floors.
Maintain specified minimum airspace
clearance-to-combustibles.
Gas Vent systems by eliminating elbows and
height interference sometimes associated
with fixed lengths of rigid single wall or Type B
Gas Vent. Individual lengths are provided with
the same type of joint connector system as
Model BV Type B Gas Vent, permitting simple
attachment. Adaptation to other Type B Gas
Vent may be accomplished by utilizing either
Model BV Universal Female B-Vent Adapter.
2) To size the connector system, follow
approved engineering design practices such
as the National Fuel Gas Code (NFPA 54)
and Canadian Fuel Gas Installation Code
(CSA-B149.1.00). Also check local code
requirements.
3) In using DuraConnect II, overall
considerations should be given to the
following:
a) Make short straight runs where possible.
b) Make no unnecessary bends.
c) Make no bends greater than 90 degrees.
d) Make bends as smooth as possible with
no dips or sags.
e) Install with at least a 1/4” per foot (20mm/m)
rise.
4) DuraConnect II Flexible Connector
is Listed by Underwriters Laboratories
(UL) for 1” (25mm) airspace clearance-to-
combustibles in an unenclosed installation.
THIS PRODUCT SHOULD NOT BE FULLY
ENCLOSED OR PASS THROUGH A
COMBUSTIBLE AREA SUCH AS A CEILING,
WALL OR ROOF JOIST.
5) Use DuraConnect II (combination) Wall/
Ceiling Support Spacers as necessary to
assure correct clearances are maintained
(see Fig. 19).
6) Never cut or modify the DuraConnect II
length. Where possible, choose lengths
which provide for proper overall length. If
necessary, however, DuraConnect II lengths
may be slightly compressed to obtain proper
length (see Fig. 20). Extra care must be
observed when bending the DuraConnect
II in the compressed state. Use only Model
DuraConnect II connector parts. Do not
substitute other flexible pipe material.
7) Joint connection design eliminates the
need for screws at joints between flexible
sections and/or B-Vent sections. However
short (maximum 1/4” (6mm)) sheet metal
screws may be used if desired. Screws
should not pierce or deform the B-Vent but
may pierce the connector.
These instructions should be observed when
installing DuraVent Type B Gas Vents. For
proper Sizing of the vent refer to the Sizing
Tables found in the “National Fuel Gas Code”,
NFPA 54 in the US or the “Canadian Fuel
Gas Installation Code”, CSA-B149.1-00 in
Canada.
Remove oil and dirt with a solvent and follow
the paint manufacturer instructions. Ordinary
house paints applied directly to steel may not
adhere well and do not prevent underfilm
corrosion which leads to paint loosening
and peeling.
NOTE: IN CANADA, ANY PIPE ABOVE THE ROOF
LINE MUST BE OF GALVALUME CONSTRUCTION,
OR PAINTED.
General:
1) DuraConnect II Flexible Connector system
is designed to simplify connection between
gas burning appliances and Model BV Type B
