Fixtures and Trap Sizes

Recommended drain trap sizes for different types of fixtures

Recommended drain trap size for different types of fixtures:

Fixture drain - trap size

FixtureTrap Size
(in)
Bathtub 1 1/2
Bidet 1 1/2
Dishwasher 1 1/2
Drinking fountain 1 1/4
Floor drain 2
Kitchen sink 1 1/2
Laundry tub 1 1/2
Lavatory 1 1/4
Public toilet integrated in the fixture
Shower 2
Toilet integrated in the fixture
Urinal 2
Washing machine 2
  • 1 in = 25.4 mm

Related Topics

  • Water Systems - Hot and cold water service systems - design properties, capacities, sizing and more

Related Documents

Tag Search

Search the Engineering ToolBox

- "the most efficient way to navigate!"

Engineering ToolBox - SketchUp Extension - Online 3D modeling!

3D Engineering ToolBox Extension to SketchUp - add parametric components to your SketchUp model

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your SketchUp model with the Engineering ToolBox - SketchUp Extension/Plugin - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro . Add the Engineering ToolBox extension to your SketchUp from the Sketchup Extension Warehouse!

Translate the Engineering ToolBox!
About the Engineering ToolBox!

close