DuraVent FasNSeal Single-Wall - Manual (Page 6)

6
VENT SIzE AND LENgTH
Refer to the appliance manufacturer’s
installation instructions for proper size and
vent configuration. Follow any horizontal/
vertical length and height limitations,
minimum clearances (air space) to
combustibles, or specifications for the use of
Elbows, Tees, or Drain Tees.
Although our Adjustable Vent Length and
Wall Thimble are designed to eliminate
cutting, there may be occasions when you
must field cut a vent length.
FIELD CUTTINg: When necessary, cut
the male end only and keep in mind that
a minimum of 2” vent length is needed
to obtain a seal on the female end. Make
a straight cut to ensure the gasket is
completely covered. Sand all burrs off
to avoid damaging the gasket during
installation. When these procedures are
followed, FasNSeal® may safely be cut in the
field.
ADJUSTABLE VENT LENgTH
The FasNSeal Adjustable Vent Length (FSAVL)
is available in all diameters and allows
the installer to easily adjust the vertical or
horizontal length of a vent system. Cutting, or
piecing together several vent lengths can be
avoided.
The FasNSeal Wall Thimble (FSWT) already
incorporates the FSAVL. In most system
layouts, this provides enough adjustability for
the horizontal vent run.
Use the FSAVL vertically for easy adjustment
of the required minimum 1/4” per foot pitch.
Technical details about the stand alone FSAVL
(see Figure 1): The overall length of all FSAVL
Adjustable Vent Length is 18” (1).
The female end (2) measures 2”, leaving 12” to
telescope into a standard vent length.
The FSAVL must penetrate no less than 4” into
a standard vent length (3) to assure a good
seal and structural stability. This leaves up to
12” in true axial adjustability (4).
12.00”
ADjUSTABILITy
(4)
FSAVL
2.00”
(2)
18.00”
OVERALL
LENGTH (1)
4.00”
PENETRATION (3)
FSVL
Figure 1