Drainage Piping and Hanger Spacing
Support of drainage 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) | |
| 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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