Storm-Water Conductors
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 US 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 US 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 |
Related Topics
• Sanitary Drainage Systems
The purpose of the sanitary drainage system is to remove effluent discharged from plumbing fixtures and other equipment.
Related Documents
Horizontal Drainage Pipe - Required Slopes
Minimum pitch of horizontal drainage pipes.
Horizontal Storm Drain Piping
Capacities of horizontal storm drain piping systems.
Manning's Formula and Gravity Flow
Calculate cross-sectional average velocity flow in open channels.
Rainfall Draining of Roof Areas and Vertical Downspouts
Capacities of vertical downspouts when draining roof areas in rainfall.
Rainfall on Roofs and Gutter Slopes
Draining of roof areas and recommended gutter slopes
Rainfall Units Converter
Convert between different rainfall or storm-water units
Sewer Pipes - Capacities vs. Slope
Carrying capacities of sewer and wastewater pipes - gpm and liter per second.