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Recommended drain trap sizes for different types of fixtures
Recommended drain trap size for different types of fixtures:
Fixtures Trap Sizes
|Fixture||Trap Size |
|Bathtub ||1 1/2 |
|Bidet ||1 1/2 |
|Dishwasher ||1 1/2 |
|Drinking fountain ||1 1/4 |
|Floor drain ||2 |
|Kitchen sink ||1 1/2 |
|Laundry tub ||1 1/2 |
|Lavatory ||1 1/4 |
|Public toilet ||integrated in the fixture |
|Shower ||2 |
|Toilet ||integrated in the fixture |
|Urinal ||2 |
|Washing machine ||2 |
- Hot and cold water service systems - design properties, capacities, sizing and more.
- Dimensions of copper tubes ASTM B306 Drain Waste and Vent - DWV.
- Nominal pipe size, outside diameter, thickness and weight.
- Dimensions of Poly(Vinyl Chloride) (PVC) Sewer Pipes with belled end.
- Dimensions of cast iron soil pipes.
- Cleanouts provides access to the sewer for rodding.
- DFU are used to calculate the drainage flow from fixtures and the required capacities of sewer service systems.
- Drain pipes and vent stack sizing.
- Support of Drain Waste and Vent - DWV - pipes.
- Vents in draining systems protects traps against pressure differences that could cause them to siphon or blow out .
- Drainage Fixture Units (DFU) connected to building drains and sewers.
- Maximum Drainage Fixture Unit - DFU - loads in sanitary piping systems.
- Septic systems handles waste from drain systems.
- Carrying capacities of sewer and wastewater pipes - gpm and liter per second.
- In sewage piping and pumping systems the fluid flow rate must be kept within certain limits to avoid operating problems.
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