Traps
Traps General
P3201.1 | Trap materials allowed. Must be smooth interior and self-cleaning. | |
P3201.2 | Must have liquid seal to prevent air bypass | |
P3201.2.1 | Water supplied to trap for seal protection | |
P3201.3 | Traps installed level and protected from freezing | |
P3201.5 | Prohibited trap designs | |
P3201.6 | Number of fixtures per trap allowed. | |
P3201.7 | Size of fixture traps | |
Â
Plumbing Fixture                                                                             Minimum Trap Size- inches
Bathtub | 1 ½ |
Clothes washer standpipe | 2 |
Dishwasher (on separate trap) | 1 ½ |
Bidet | 1 ¼ |
Kitchen sink (one or two traps, with or without dishwasher and food waste disposer) | 1 ½ |
Laundry tub | 1 ½ |
Shower -based on the total flow rate through showerheads and sprayers Flow rate: 5.7 gpm and less More than 5.7 gpm up to 12.3 gpm More than 12.3 gpm up to 25.8 gpm More than 25.8 gpm up to 55.6 gpm |    1 ¼ 2 3 4 |
