Written by IAPMO 4:57 pm Uniform Codes Spotlight


May 25, 2023

From the 2021 UPC Illustrated Training Manual, Chapter 4, PLUMBING FIXTURES AND FIXTURE FITTINGS

402.5 Setting. Fixtures shall be set level and in proper alignment with reference to adjacent walls. No water closet or bidet shall be set closer than 15 inches (381 mm) from its center to a side wall or obstruction or closer than 30 inches (762 mm) center to center to a similar fixture. The clear space in front of a water closet, lavatory, or bidet shall be not less than 24 inches (610 mm). No urinal shall be set closer than 12 inches (305 mm) from its center to a side wall or partition or closer than 24 inches (610 mm) center to center.

Exception: The installation of paper dispensers or accessibility grab bars shall not be considered obstructions.

The side-wall, center-to-center and front-clearance measurements for the water closet and urinal are some of the most important measurements in plumbing. These measurements decide where piping will be placed in the building. One thing to remember is that the measurements will not be the same if bathroom partitions are to be installed or if fixtures of accessible design are required. Always check the architectural print and specifications before laying out piping. Remember, these are minimum measurements (see Figure 402.5).

The 2021 Uniform Plumbing Code Illustrated Training Manual is available for purchase here.

(This is not to be considered the official position of IAPMO, nor is it an official interpretation of the Codes.)

Last modified: May 25, 2023