Wall Mounted Plumbing Fixture Supports

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
Article Updated: May 23, 2021

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