What matters here
Lewisville's tester page and code language make fire assemblies a separate operational concern because not every tester can legally test every fire device.
Fire line
City of Lewisville Backflow Testing fire line backflow rules
Lewisville's tester page and code language make fire assemblies a separate operational concern because not every tester can legally test every fire device.
Utility: City of Lewisville Backflow Testing
Last verified: 2026-04-04
Due basis: Lewisville says backflow prevention assemblies must be tested at installation and at least once per year thereafter by a licensed tester registered with the City. Test reports must be submitted electronically through BSI Online within ten days of the test date.
Highlights
- Fire sprinkler systems are explicitly named on the official page.
- Lewisville warns that testers need the right credentials for the assembly being tested.
- Fire assembly delays can be more expensive because the enforcement language is stronger and the device type is more specialized.
Workflow
Workflow
- Confirm the assembly is part of the fire protection side of the property.
- Verify the chosen tester is licensed for the fire assembly type, not just general backflow work.
- Submit through the same Lewisville BSI workflow before the ten-day deadline.
Residential
- Residential users usually hit this through irrigation systems and other hazards the City flags at the meter or within the property.
- Not every listed tester can handle every device type, so homeowners need to match the tester to the assembly.
Commercial and managed properties
- Commercial, industrial, multifamily, and managed properties should assume annual testing is part of recurring compliance once the City requires a device.
- Lewisville's code excerpts make service interruption and fine exposure more explicit than many city pages.
Tester routing
Use the governing authority's official tester list first, then only treat any sponsor placement as secondary routing.
FAQ
Local questions people actually ask
Does City of Lewisville Backflow Testing require annual backflow testing?
At installation and at least once per year thereafter. Lewisville says backflow prevention assemblies must be tested at installation and at least once per year thereafter by a licensed tester registered with the City. Test reports must be submitted electronically through BSI Online within ten days of the test date.
Who is affected by City of Lewisville Backflow Testing backflow rules?
Irrigation, fire sprinkler, commercial, industrial, multi-family, and other properties the City deems a cross-connection hazard.
How do I submit or confirm a backflow test for City of Lewisville Backflow Testing?
Use the official utility workflow and submission methods listed on this page: Lewisville backflow testing program page, Lewisville tester registration portal, BSI Online submission portal. Program phone: 972-219-3400.
Where should I look for testers for City of Lewisville Backflow Testing?
Start with the governing authority's published tester list. This utility has an official approved-tester route and it should be treated as the primary source.
Official sources
Lewisville backflow testing page
Lewisville's tester page and code language make fire assemblies a separate operational concern because not every tester can legally test every fire device.
official program page
Lewisville tester list
Lewisville's tester page and code language make fire assemblies a separate operational concern because not every tester can legally test every fire device.
official list
BSI Online for Lewisville submissions
Lewisville's tester page and code language make fire assemblies a separate operational concern because not every tester can legally test every fire device.
official vendor portal