Fig. 34—Short Vent (5 to 8 Ft) System
A96230
HORIZONTAL TO ROOF HORIZONTAL TO SIDEWALL
VERTICAL TO SIDEWALLVERTICAL TO ROOF
VENT PIPE
COMBUSTION-AIR PIPE COMBUSTION-AIR PIPE
VENT PIPE
COMBUSTION-AIR PIPE
VENT PIPE
COMBUSTION-AIR PIPE
VENT PIPE
12″ MIN
12″ MIN
12″ MIN
12″ MIN
NOTE
: A 12 In. minimum offset pipe section is recommended with 
short (5 to 8 ft) vent systems. This recommendation is to reduce 
excessive condensate droplets from exiting the vent pipe.
Table 6—Approved Combustion-Air and Vent Pipe, Fitting and Cement Materials
ASTM SPECIFICATION
(MARKED ON MATERIAL)
MATERIAL PIPE FITTINGS SOLVENT CEMENT AND PRIMERS DESCRIPTION
D1527 ABS Pipe —— Schedule-40
D1785 PVC Pipe —— Schedule-40
D2235 For ABS ——
Solvent
Cement
For ABS
D2241 PVC Pipe —— SDR-21 & SDR-26
D2466 PVC — Fittings — Schedule-40
D2468 ABS — Fittings — Schedule-40
D2564 For PVC ——
Solvent
Cement
For PVC
D2661 ABS Pipe Fittings — DWV at Schedule-40 IPS sizes
D2665 PVC Pipe Fittings — DWV
F438 CPVC — Fittings — Schedule-40
F441 CPVC Pipe —— Schedule-40
F442 CPVC Pipe —— SDR
F493 For CPVC ——
Solvent
Cement
For CPVC
F628 ABS Pipe ——Cellular Core DWV at Schedule-40 IPS sizes
F656 For PVC —— Primer For PVC
F891 PVC Pipe —— Cellular Core Schedule-40 & DWV
25