Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!

Trap Sizes vs. Fixture Units

No. of fixture units and required trap size.

Maximum no. of fixture units and required trap sizes:

Sanitary Trap Sizes vs. Fixture Units
No. of Fixture UnitsTrap Size
(in)
1 1 1/4
2 - 3 1 1/2
3 - 4 2
5 - 6 3
6 - 8 4
  • 1 ib = 25.4 mm
3D Engineering ToolBox - draw and model technical applications! 2D Engineering ToolBox - create and share online diagram drawing templates! Engineering ToolBox Apps - mobile online and offline engineering applications!

Unit Converter


















































3.20.8

.