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Servicing should only be performed by a Qualied Service Agent
VENTING TABLES – SUF 120 ‑ 250
Maximum equivalent feet of intake and vent pipe using 3" PVC is 50 feet (15.2 m). Equivalent feet must
include any 90° elbows (two 45° elbows equal one 90° elbow). Three inch diameter 90° elbows are
equivalent to 5' (1.5 m) of pipe.
Maximum equivalent feet of intake and vent pipe using 4" PVC is 120 feet (36.6 m). Equivalent feet
must include any 90° elbows (two 45° elbows equal one 90° elbow). Four inch diameter 90° elbows are
equivalent to 5' (1.5 m) of pipe.
Vent Length Table Equivalent Feet (Meters) 120 through 250
Number of 90° Elbows 3" Minimum Pipe (Ft./M.) 3" Maximum Pipe (Ft./M.) 4" Maximum Pipe (Ft./M.)
ONE (1) 7/2.1 45/13.7 115/35
TWO (2) 7/2.1 40/12.2 110/33.5
THREE (3) 7/2.1 35/10.7 105/32
FOUR (4) 7/2.1 30/9.1 100/30.5
FIVE (5) 7/2.1 — 95/29
SIX (6) 7/2.1 — 90/27.4
VENTING TABLES – SUF 300, 400, 500
Vent Length Table Equivalent Feet (Meters) 300, 400, 500
Number of 90° Elbows 4" PVC Maximum
Feet/meters of Pipe (Ft./M.)
ONE (1) 65'/19.7 m
TWO (2) 60'/18.2 m
THREE (3) 55'/16.7 m
FOUR (4) 50'/15.2 m
FIVE (5) 45'/13.6 m
SIX (6) 40'/12.1 m