Hot and Cold Water Pipes Sizing
Recommended dimensions hot and cold water pipes.
The table below can be used to determine the maximum numbers of draw offs served by a pipe:
| Nominal bore of pipe | Maximum number of draw offs served | ||||
|---|---|---|---|---|---|
| Flow pipes | Return pipes | ||||
| in | Steel pipe (mm) | Copper pipe (mm) | Head up to 20 m (70 ft) | Head over 20 m (70 ft) | |
| 1/2 | 15 | 15 | 1 | 1 - 2 | 1 - 8 |
| 3/4 | 20 | 22 | 2 - 4 | 3 - 9 | 9 - 29 |
| 1 | 25 | 28 | 5 - 8 | 10 - 19 | 30 - 66 |
| 1 1/4 | 32 | 35 | 9 - 24 | 20 - 49 | 67 - 169 |
| 1 1/2 | 40 | 42 | 25 - 49 | 50 - 79 | 170 - 350 |
| 2 | 50 | 54 | 50 - 99 | 80 - 153 | |
| 2 1/2 | 65 | 67 | 100 - 200 | 154 - 300 | |
- Basins, sinks, showers and similar are regarded as 1 draw off
- Baths and similar are regarded as 2 draw offs
Related Topics
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Water Systems
Design of hot and cold water service and utility systems with properties, capacities, sizing of pipe lines and more.
Related Documents
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Cold Water Storage per Occupant
Cold water storage for occupants in common types of buildings as factories, hospitals, houses and more -
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Design procedures for domestic hot water service systems. -
Domestic Service Water Supply Systems
Introduction to general design of domestic service water supply systems - with pressurized or gravity tanks. -
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Hot Water Circulation System - Return Pipes
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Materials used in water distribution pipes. -
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Converting WSFU - Water Supply Fixture Units - to GPM. -
Water Supply Fixture Units WSFU
WSFU is used to calculate water supply service systems. -
Water Supply Pipe Lines - Sizing
Sizing of water supply pipe lines. -
Water Supply Public Buildings
Required water supply to public buildings. -
Water Supply Systems - Online Design Application
Free online tool for designing water supply systems in buildings. -
Yard Fixtures - Water Consumption
Water consumption in garden fixtures.
