DuraVent Type B Gas Vent - Manual (Page 8)

8
an optional pipe collar is available for decorative
purposes.
6. Connectors. Only DuraVent connectors
should be used between the appliances and the
venting system. Some appliances require Type
B-Vent as a complete dedicated system from the
flue collar of the appliance to the termination of
the vent to the outside atmosphere. DuraVent’s
Duraconnect, a uL listed flexible connector, can
be used if single wall connectors are allowed. If
a B-vent connector is required, uL listed double
wall flexible Duraconnect II, can be used.
7. Elbows. When Elbows are required, strap the
pipe Sections and/or Elbows in place using Wall
Straps. Important: the offset must be supported
with Wall Straps to prevent the weight from
stressing the elbows, as shown in Figure 10.
8. Tees and Wyes. Tees and Wyes are
used to combine connectors from 2 or more
appliances into a common vent as shown in
Figures 2 and 3. a Tee should be used in
a through-the-wall application, (Figure 11),
as they have a removable Tee cap (available
as a separate item) attached to the bottom.
This Tee cap may be removed in order to
inspect the system, or to clean out debris or
collected condensate from the common vent.
Wall Straps should be used to support the
vertical pipe as needed to provide a secure
installation. Wall Straps every four feet are
required.
9. Enclosures. any portion of the vent which
passes through an occupied area must be
enclosed, to prevent accidental damage to
the system, as well as burns. Figure 1 shows
a system which passes through an occupied
second floor. DuraVent does not recommend
installation of B-Vent pipe on the outside wall
of a building, particularly in cold climates. If
it is necessary to do this, enclose the outside
portion of the system in a chase, as shown
in Figure 11. consult the Local authority
Figure 9
STEp 1
STEp 2 STEp 3
Figure 10
1 IncH
MInIMuM
cLEaRancE TO
cOMBuSTIBLES
aT aLL pOInTS
WaLL STRap
WaLL STRapS
ELBOW GORES
cEILInG SuppORT
EXISTInG
STRucTuRE
45º / 60º
ELBOW