TRAPS

Fixture Traps

Trap Size
1. Use the following table to determine the minimum trap size for most plumbing fixtures.
2. Do not install separate traps on toilets, urinals, and other fi xtures that have traps in the fixture itself.
3. Do not install a trap that is larger than the drainage pipe into which the trap discharges. Example: do not connect a 2 inch trap to a 1 ½ inch pipe on the discharge side of the trap.

Trap Design
1. Install traps of standard design that: (a) have a smooth internal surface for water flow, and (b) are self-cleaning, and (c) do not have interior partitions or moving parts, and (d) are constructed using cast iron, cast or drawn brass, or approved plastic. Standard design for modern fixture traps is the P trap. Read the full Topic

Fixture Traps

Trap Size
1. Use the following table to determine the minimum trap size for most plumbing fi xtures.
2. Do not install separate traps on toilets, urinals, and other fi xtures that have traps in the fi xture itself.
3. Do not install a trap that is larger than the drainage pipe into which the trap discharges. Example: do not connect a 2 inch trap to a 1 ½ inch pipe on the discharge side of the trap. Read the full Topic