DuraVent DuraConnect - Manual (Page 9)

9
SBCCI Compliance Report 9135
ICBO Evaluation Report 4895
BOCA Research Report 90-82
Patent 5,165,732
National, Standard, and Uniform
Mechanical Codes. The DuraConnect
flexible connector system has been
approved by SBCCI, BOCA and ICBO.
ADDENDUM
This is an addendum to the DuraConnect
& DuraConnect II Installation
Instructions. Please read the full
Installation Instructions for DuraConnect
& DuraConnect II in this document, as
well as the Installation Instructions for
Simpson Dura-Vent Gas Vent systems
(L204) in addition to this document.
Where the full Installation Instructions
for DuraConnect II and this addendum
differ, this addendum takes precedence.
WARNING: It is important that vents
and vent connectors be installed in
accordance with simpson dura-vent
installation nstructions. A major cause
of fire related problems with vents
and vent connectors is the failure to
install with required clearances (air
spaces) to combustible materials.
Read through all of these instructions
before beginning your installation.
Failure to install the connector as
described in these instructions will
void the manufacturers warranty
and may affect your homeowner’s
insurance and UL listing.
DuraConnect II has been approved by
Underwriters Laboratories for use as
a segment of Type B Gas vent system
for installation in conditioned and
unconditioned Attics and Crawl Spaces,
as explained in these instructions.
Please note that this applies only
to DuraConnect II (double wall flex
segment/connector) and NOT to
DuraConnect (single wall flex connector).
DuraConnect II is considered to have the
equivalent thermal properties as B-Vent
(double-wall gas vent), and can be used
where a B-Vent connector is required.
Please refer to the NFPA 54 (National
Fuel Gas Code) or the Sizing Handbook
available from Simpson Dura-Vent for
proper gas vent sizing.
The following restrictions apply to
installing DuraConnect II as a Gas Vent
Segment:
- DuraConnect II may NOT be fully
enclosed inside a chase.
- DuraConnect II may NOT penetrate or
pass through any combustible surface
(walls, ceilings, floors, orroofs, etc.).
Passing through combustible surfaces
can only be done with rigid gas vent
sections (see L204 for instructions).
- Always maintain at least 1” clearance
between DuraConnect II and
combustible materials.
- When installing DuraConnect II as a
segment in an Attic space (Fig 7), rigid
Type B Gas Vent must
penetrate at least 3” up into the Attic
before DuraConnect II can be attached.
The Type B Gas Vent
extending up into the Attic must be
secured using either a Firestop Support,
or a combination of Firestop Spacer
and Wall Strap. Also, there must be a
minimum of 3” of rigid Type B Gas Vent
extending down below roof joists. The
rigid Type B Gas Vent above the segment
of DuraConnect II must also be secured