Storm-Water Conductors
Roof drain capacities.
Capacities of horizontal sloped and vertical stormwater and rainwater leaders:
Imperial Units
Pipe Size NPS (in) | Capacity (gpm) | |||
|---|---|---|---|---|
| Vertical Roof Drains | Horizontal Sloped Pipe (slope in/ft) | |||
| 1/8 | 1/4 | 1/2 | ||
| 3 | 90 | 35 | 50 | 70 |
| 4 | 190 | 80 | 110 | 157 |
| 5 | 360 | 140 | 200 | 280 |
| 6 | 560 | 225 | 315 | 450 |
| 8 | 1200 | 480 | 680 | 950 |
| 10 | 860 | 1220 | 1728 | |
Metric Units
| Pipe Size DN (mm) | Capacity (l/s) | |||
|---|---|---|---|---|
| Vertical Roof Drains | Horizontal Sloped Pipe (slope cm/m) | |||
| 1 | 2.1 | 4.2 | ||
| 80 | 5.8 | 2.1 | 3.0 | 4.3 |
| 100 | 12 | 4.9 | 6.9 | 9.9 |
| 125 | 22 | 8.8 | 12 | 18 |
| 150 | 36 | 14 | 20 | 28 |
| 200 | 76 | 30 | 43 | 60 |
| 250 | 54 | 77 | 109 | |
Storm Sewer Pipe
Materials used in Building Storm Sewer Pipes according U.S. standards.
| Piping Material | US Standards |
|---|---|
| Acrylonitrile butadiene styrene (ABS) plastic pipe in IPS diameters, including Schedule 40, DR 22 (PS 200) and DR 24 (PS 140); with a solid, cellular core or composite wall. | ASTM D2661; ASTM F628;ASTM F1488; CSA B181.1; CSA B182.1 |
| Cast-iron pipe | ASTM A74; ASTM A888; CISPI 301 |
| Concrete pipe | ASTM C14; ASTM C76; CSA A257.1M; CSA A257.2M |
| Copper or copper-alloy tubing (Type K, L, M or DWV) | ASTM B75; ASTM B88; ASTM B251; ASTM B306 |
| Polyethylene (PE) plastic pipe | ASTM F667; ASTM F2306/F2306M; ASTM F2648/F2648M |
| Polypropylene (PP) pipe | ASTM F2881; CSA B182.13 |
| Polyvinyl chloride (PVC) plastic pipe (Type DWV, SDR26, SDR35, SDR41, PS50 or PS100) in IPS diameters, including Schedule 40, DR 22 (PS 200) and DR 24 (PS 140); with a solid, cellular core or composite wall. | ASTM D2665; ASTM D3034; ASTM F891; ASTM F1488; CSA B182.4; CSA B181.2; CSA B182.2 |
| Vitrified clay pipe | ASTM C4; ASTM C700 |
| Stainless steel drainage systems, Type 316L | ASME A112.3.1 |
Materials used in Subsoil Storm Sewer Pipes according U.S. standards.
| Piping Material | US Standards |
|---|---|
| Cast-iron pipe | ASTM A74; ASTM A888;CISPI 301 |
| Polyethylene (PE) plastic pipe | ASTM F405; ASTM F667;CSA B182.1;CSA B182.6; CSA B182.8 |
| Polyvinyl chloride (PVC) Plastic pipe (type sewer pipe, SDR35, PS25, PS50 or PS100) | ASTM D2729; ASTM D3034, ASTM F891; CSA B182.2; CSA B182.4 |
| Stainless steel drainage systems, Type 316L | ASME A112.3.1 |
| Vitrified clay pipe | ASTM C4; ASTM C700 |
