Trap Sizes vs. Fixture Units

Determines the required trap size based on the number of fixture units in a drainage system.

Sanitary Trap Sizes vs. Fixture Units

This tool helps you determine the required trap size based on the number of fixture units in your drainage system.

Note: 1 in = 25.4 mm

Calculator

Inputs

Results

Required Trap Size (in)-- in
Required Trap Size (mm)-- mm
No. of Fixture UnitsTrap Size (in)
11 1/4
2 - 31 1/2
3 - 42
5 - 63
6 - 84
Trap Sizes vs. Fixture Units | MEPKit Engineering Tools | MEPKit