Cementing Joints; Joining Pipe And Fittings - Rheem 97MDV060 Series Installation Instructions Manual

GENERAL VENTING REQUIREMENTS AND
GUIDELINES
VENTING & COMBUSTION AIR REQUIREMENTS (cont.)
installed per the manufacturer's instructions. NOTE:
Never cover heat tape with insulation.
6. IMPORTANT: No part of the combustion air and/or
5. The minimum vent pipe length is 5 feet [1.5m].
vent pipes may be installed underground.
7. Piping at a roof, wall or other penetration must be im-
mobilized to prevent pipes from disconnecting. Dis-
connected pipes may allow flue products to be
released inside the structure.
8. For Direct Vent systems, all pipe penetrations through
roof or sidewall must be installed so that the vent and
combustion air intake pipes terminate in the same at-
mospheric pressure zone.
9. Vent terminations must be installed with the minimum
clearances specified in the TERMINATION REQUIRE-
MENTS sections of this manual and Figure 15 (for
Non-Direct Vent) and Figures 16, 17 & 26 (for direct
Vent installations).
10. Piping external to the structure (excluding approved
venting terminations) and vent passing through un-
heated crawl-spaces, attics, verandas, patios or decks
must be insulated with approved insulating material to

JOINING PIPE AND FITTINGS

prevent freezing as required for local climate.
(U.S. Only)
For Canadian installations all exhaust venting materials must be certified to
ULCS-636C.
24
All pipe, fittings, solvent cement, primers and procedures
must be installed following the vent manufacturer's instal-
lation instructions and must conform to American National
terials (ANSI/ASTM) standards as shown in the Table 1
Standards Institute and American Society for Testing Ma-

CEMENTING JOINTS

below:
Properly seal all joints in the PVC vent using the following
PVC CLEANER-PRIMER AND PVC
materials and procedures.
MEDIUM-BODY SOLVENT CEMENT
IMPORTANT: After cutting pipe, remove all ragged edges
and burrs. This is important to prevent reduction in pres-
sure drop throughout the system.
1. Cut pipe end square. Chamfer edge of pipe. Clean
fitting socket and pipe joint area of all dirt, grease and
moisture.
2. After checking pipe and socket for proper fit, wipe
socket and pipe with cleaner-primer. Apply a liberal
coat of primer to inside surface of socket and outside
of pipe. Read instructions included with the primer for
proper application.
3. Apply a thin coat of cement evenly within the socket.
Quickly apply a heavy coat of cement to the pipe end
and insert pipe into the fitting with a slight twisting
NOTE: Cement must be fluid. If not, re-coat.
movement until it bottoms out.
4. Hold the pipe in the fitting for 30 seconds to prevent
the tapered socket from pushing the pipe out of the fit-
ting.
5. Wipe all excess cement from the joint with a rag.
Allow 15 minutes before handling. Cure time varies
NOTE: Stir the solvent cement frequently while using.
according to fit, temperature and humidity.
Use a natural bristle brush or the dauber supplied with the
IMPORTANT: For proper installation:
can. The proper brush size is one inch.
DO NOT use solvent cement that has become cur-
DO NOT thin. Observe shelf precautions printed on
dled, lumpy or thickened.
containers. For applications below 32°F, use only low-
temperature type solvent cement.