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 Supports - Adjustable Carriers

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

In-wall Toilet Carrier in Stud Wall
In-wall Toilet Carrier in Stud Wall

Water Closet, Single, Stud Wall
Single Water Closet in a Stud Wall


Water Closet, Single, Block Wall
Single Water Closet in a Block Wall


Water Closet, Double, Stud Wall
Double Water Closet in a Stud Wall


Water Closet, Double, Block Wall
Double Water Closet in a Block Wall

Ad - Article Continues Below

Urinal Supports

Urinal

Lavatory / Sink Supports

In-Wall Sink Support in Stud Wall
In-Wall Sink Support in Stud Wall

Lavatory

Ad - Article Continues Below
Help make archtoolbox better. If you found an error or out of date information in this article, please let us know.

Subscribe to the Archtoolbox Newsletter:
Receive a monthly email with industry news focusing on practice, leadership, technology, and career growth.