Wall Mounted Plumbing Fixture Supports

By Archtoolbox Updated 23 May 2021

Wall mounted plumbing fixtures require mounting brackets to be installed within the wall (concealed). The dimensions vary based on the type of bracket, the accessories required, and the model of the carrier. The dimensions below are based on minimum requirements and come from the Plumbing and Drainage Institute. The PDI has a handy PDF chart of space requirements for plumbing fixture supports. Refer to manufacturer information for specific requirements.

Water Closet / Toilet Supports – Adjustable Carriers

Fixed carriers are less common, but require less clear space in the wall cavity.

Photo of an In-wall Toilet Carrier in Stud Wall — *In-wall Toilet Carrier in Stud Wall*

Section graphic of a Water Closet / Toilet, Single, Stud Wall — *Water Closet / Toilet, Single, Stud Wall*

Section graphic of a Water Closet / Toilet, Single, Block Wall — *Water Closet / Toilet, Single, Block Wall*

Section graphic of a Water Closet / Toilet, Double, Stud Wall — *Water Closet / Toilet, Double, Stud Wall*

Section graphic of a Water Closet / Toilet, Double, Block Wall — *Water Closet / Toilet, Double, Block Wall*

Urinal Supports

Section graphic of a Typical Urinal Support — *Typical Urinal Support*

Lavatory / Sink Supports

Photo of an In-Wall Sink Support in Stud Wall — *In-Wall Sink Support in Stud Wall*

Section diagram of a Typical Sink / Lavatory Support — *Typical Sink / Lavatory Support*

Help make Archtoolbox better for everyone. If you found an error or out of date information in this article (even if it is just a minor typo), please let us know.