Drain Waste and Vent Pipe Hanger Spacing

Support of Drain Waste and Vent - DWV - pipes

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Both vertical and horizontal drainage pipes must be supported properly. Recommended maximum distances between the hangers are indicated in the table below.

Piping Material	Distance between Supports (ft)
Piping Material	Horizontal Pipe	Vertical Pipe
ABS plastic	4	4
Galvanized steel	12	15
DWV Copper	10	10
Cast Iron	5	15¹⁾
PVC plastic	4	4

¹⁾ For cast iron stacks, the base of each stack must be supported

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