Layton City Public Works (Water): backflow testing rules
Serves Layton, UT. Every point below comes from Layton City Public Works (Water)'s own pages, linked; check your notice for your own deadline.
Who must test
- Residential services (lines smaller than 1 1/4 inch) are normally protected by a dual check valve at the meter, but every landscape sprinkler system using culinary water needs its own backflow preventer. Source.
- For commercial services (lines larger than 1 1/4 inch) the required assembly depends on the hazard, which a city hazard assessment can determine; the owner buys the assembly and hires a licensed plumber to install it. Source.
Notices and deadlines
- Within ten days of being placed in service, a commercial assembly must be tested by a certified backflow technician and the report sent to the city; the test and report are renewed every year. Source.
- The test and the report sent to the city must be updated annually. Source.
Program
- Layton's program, set out in Section 13.06 of the municipal code, uses a containment strategy that puts a backflow device on each individual service connection. Source.
Read October 6, 2026. Program page: laytoncityutah.gov.