Type of Fixture or Group of FixturesBased on the 2003 International Plumbing Code |
Fixture Units |
| Automatic (commercial) clothes washer (2" standpipe) | 3 |
| Automatic (residential) clothes washer | 2 |
| Bathroom group consisting of water closet, lavatory, bathtub or shower, including or excluding a bidet, an emergency floor drain, or both. (1.6 gpf water closet) | 5 |
| Bathroom group consisting of water closet, lavatory, bathtub or shower, including or excluding a bidet, an emergency floor drain, or both. (greater than 1.6 gpf water closet) | 6 |
| Bathtub (with or without overhead shower) | 2 |
| Bidet | 1 |
| Combination sink-and-tray | 2 |
| Dental unit or cuspidor | 1 |
| Dental lavatory | 1 |
| Drinking fountain | ½ |
| Dishwasher, domestic | 2 |
| Floor drains with 2" waste | 2 |
| Kitchen sink, domestic, with one 1½" waste | 2 |
| Kitchen sink, domestic, with food waste grinder and/or dishwasher | 2 |
| Lavatory with 1¼" waste | 1 |
| Laundry tray (1 or 2 compartments) | 2 |
| Shower stall | 2 |
| Sinks | 2 |
| Urinal | 4 |
| Urinal, 1 gallon per flush or less | 2 |
| Wash Sink (circular or multiple) each set of faucets | 2 |
| Water closet, flushometer tank, public or private | 4 |
| Water closet, private (1.6 gpf) | 3 |
| Water closet, private (flushing greater than 1.6 gpf) | 4 |
| Water closet, public (1.6 gpf) | 4 |
| Water closet, public (flushing greater than 1.6 gpf) | 6 |
| Fixture drain or trap size: | |
| 1¼" | 1 |
| 1½" | 2 |
| 2" | 3 |
| 2½" | 4 |
| 3" | 5 |
| 4" | 6 |