Table 5 – Approved
ASTM |
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SPECIFICATION | MATERIAL | PIPE | FITTINGS | SOLVENT | DESCRIPTION | |
CEMENT | ||||||
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(MARKED ON |
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| AND PRIMERS |
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MATERIAL) |
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D1527 | ABS | Pipe | — | — | Schedule40 | |
D1785 | PVC | Pipe | — | — | Schedule40 | |
D2235 | For ABS | — | — | Solvent | For ABS | |
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| Cement |
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D2241 | PVC | Pipe | — | — | SDR21 & SDR26 | |
D2466 | PVC | — | Fittings | — | Schedule40 | |
D2468 | ABS | — | Fittings | — | Schedule40 | |
D2564 | For PVC | — | — | Solvent | For PVC | |
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| Cement |
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D2661 | ABS | Pipe | Fittings | — | DWV at Schedule40 IPS sizes | |
D2665 | PVC | Pipe | Fittings | — | DWV | |
F438 | CPVC | — | Fittings | — | Schedule40 | |
F441 | CPVC | Pipe | — | — | Schedule40 | |
F442 | CPVC | Pipe | — | — | SDR | |
F493 | For CPVC | — | — | Solvent | For CPVC | |
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| Cement |
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F628 | ABS | Pipe | — | — | Cellular Core DWV at Schedule40 | |
IPS sizes | ||||||
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F656 | For PVC | — | — | Primer | For PVC | |
F891 | PVC | Pipe | — | — | Cellular Core Schedule40 & | |
DWV | ||||||
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355CAV
Installation Guidelines for Combustion Air Pipe and Vent Pipe
It is recommended that all pipes be cut, prepared, and preassembled before permanently cementing any joint.
1.Attach combustion air pipe and vent pipe per instructions in sections “Combustion Air Pipe” and “Vent Pipe.”
2.Working from furnace to outside, cut pipe to required length(s).
3.Deburr inside and outside of pipe.
4.Chamfer outside edge of pipe for better distribution of primer and cement.
5.Clean and dry all surfaces to be joined.
6.Check dry fit of pipe and mark insertion depth on pipe.
7.After pipes have been cut and preassembled, apply generous layer of cement primer to pipe fitting socket and end of pipe to insertion mark. Quickly apply approved cement to end of pipe and fitting socket (over primer). Apply cement in a light, uniform coat on inside of socket to prevent buildup of excess cement. Apply second coat.
8.While cement is still wet, twist pipe into socket with 1/4 turn. Be sure pipe is fully inserted into fitting socket.
9.Wipe excess cement from joint. A continuous bead of cement will be visible around perimeter of a properly made joint.
10.Handle pipe joints carefully until cement sets.
11.Horizontal portions of the venting system shall be supported to prevent sagging. Support combustion air
piping and vent piping a minimum of every 5 ft (1.5 m)(3 ft (.91 m) for
12.Slope combustion air piping and vent piping downward towards furnace a minimum of
13.Horizontal portions of the venting system shall be installed so as to prevent the accumulation of condensate.
14.Use appropriate methods to seal openings where combustion air pipe and vent pipe pass through roof or sidewall.
Combustion-Air and Vent Pipe Diameter
Determine
1.Using Table 7, individually determine the diameter of the
2.When installing vent systems of short pipe length, use the smallest allowable pipe diameter. Do not use pipe size greater than required or incomplete combustion, flame disturbance, or flame sense lockout may occur.
NOTE: Do not count elbows or pipe sections in terminations or within furnace.
NOTE: A
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