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ATTACH 45 °
BRACKET / -.
TERMINATION
_.
_
\
"_
ELBOW
12 in.
VENT
(g0 cm) min.
RISER
GROUND
LEWL*\ /
SEALANT
VENT
PIPING TO
BE SLOPED
(DOWN)
TOWARD
HEATER TO
* WHERE
SNOW COVER IS NORMAL
DURING WINTER,
PREVENT
ENSURE SUFFICIENT
VENT CLEARANCE
TO PREVENT
WATER FROM
BLOCKAGE
OR ICE BUILDUP.
COLLECTING.
FIGURE 26
INSTALLATION OF VERTICAL VENT SYSTEM
A proper flashing or "BOOT" should be used to seal the
pipe where it exits the roof. The total vent system should
not exceed the equivalent feet of pipe as listed in Table
1.
Provide support for all pipe protruding through the roof. All
piping should be properly secured. The vent system piping
should be supported every 5 ft. (1 .Era) of vertical run and
every 3 ft. (91cm) of horizontal run. All piping and fittings
must be joined by the proper procedures as described
under "Vent Pipe Preparation".
!
* MIN.
18" (46cm)
ABOVE
ROOF
OR
*MIN,
18" (46cm)
ABOVE
ANTICIPATED
SNOW
LEVEL
MAXIMUM EQUIVALENT
FEET. SEE TABLE 1.
m
FLOOR
*ALL
PIPE PROTRUDING
THROUGHTHE
ROOF
SHOULD
BE PROPERLY
SUPPORTED,
FIGURE 27
GRADE
3 in. (7,60m)
"I
_
TERMINATION
MIN. LENGTH
MAY BE 45 °
/flqT '/ELBOW ORA
_j
"T" ELBOW
I
17
X
RODENT
A VENT
USED
IN A SPECIAL
I
I
18in.
"SCREEN
VENTING
SYSTEM
WITH POSITIVE
I
I( 45cm )
(INSTALL
VENT
PRESSURE
AND
PASSING
I I
I
INTO
THROUGH
A
ROOF
SHALL
\7
F--7
I
ELBOW)
EXTEND AT LEAST 450rnm (18_L
I
_,
in.) ABOVE
THE HIGHEST
POINT v_
ROOF
WHERE
IT PASSES
THROUGH
_____-J_J.._._
_
','T.T-
THE ROOF
SURFACE
AND ANY<,,'_--J___.
.'_
LINk
OTHER
OBSTRUCTION
WITHIN
I-'_/j_>
A HORIZONTAL
DISTANCE
OF
I I __
450mm
(18
in.).
A VERTICAL
I I
VENTING
SYSTEM
MUST
BE
I I
SUPPORTED
EVERY 1 .Sin (5 ft.)
I_
_\
FIGURE 28
VENT PIPE PREPARATION
1. INITIAL PREPARATION.
A. Make sure the solvent cement you are planning to
use is designed for the specific application you are
attempting.
B. Know the physical and chemical characteristics and
limitations of the PVC and CPVC piping materials
that you are about to use.
C. Know the reputation of your manufacturer and their
products.
D. Know your own qualifications
or those of your
contractor. The solvent welding technique of joining
PVC and CPVC pipe is a specialized skill just as any
other pipe fitting technique.
E. Closely supervise the installation and inspect the
finished job before start-up.
R Contact the manufacturer,
supplier, or competent
consulting agency if you have any questions about
the application or installation of PVC and CPVC
pipe.
G. Take the time and effort to do a professional job.
Shortcuts will only cause you problems and delays
in start-up. By far, the majority of failures in PVC and
CPVC systems are the result of shortcuts and/or
improper joining techniques.
2. SELECTION OF MATERIALS.
•
Cutting Device - Saw or Pipe Cutter.
•
Deburring Tool, Knife, File, or Beveling Machine (2
in. and above).
•
Brush - Pure Bristle.
•
Rag - Cotton (Not Synthetic).
•
Primer and Cleaner.
•
Solvent Cement - PVC for PVC Components and
CPVC for CPVC Components.
•
Containers
- Metal or Glass to hold Primer and
Cement. Select the type of PVC or CPVC materials
to be used on the basis of their application with
respect to chemical
resistance,
pressure rating,
temperature characteristics,
etc.
•
Insertion Tool - Helpful for larger diameter pipe and
fittings 6 in. (15cm) and above.
28
Part Number 320169-001
dRaFt Jun 9 130
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