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Drain Waste and Vent Pipes - 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.

Drain Waste and Vent Pipes - Hanger Spacing
Piping MaterialDistance between Supports (ft)
Horizontal PipeVertical 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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Related Topics

  • Sanitary Drainage Systems

    The purpose of the sanitary drainage system is to remove effluent discharged from plumbing fixtures and other equipment.

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