Recommended drain trap sizes for different types of fixtures
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Recommended drain trap size for different types of fixtures:
| Fixture | Trap Size (in) |
|---|---|
| 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 |
- 1 in = 25.4 mm
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