What matters here
Lewisville publishes one of the cleanest annual-testing workflows in the pilot set: test at installation and at least once per year thereafter, then submit electronically through BSI within ten days.
Annual testing
City of Lewisville Backflow Testing annual backflow testing
Lewisville publishes one of the cleanest annual-testing workflows in the pilot set: test at installation and at least once per year thereafter, then submit electronically through BSI within ten days.
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
- At least annual after installation is the baseline rule.
- BSI submission must happen within ten days of the test date.
- Lewisville also adds a $25 filing fee per test submission.
Workflow
Workflow
- Confirm the property falls into a category where Lewisville requires an assembly.
- Use a Texas-licensed tester who is currently registered with the City of Lewisville.
- Submit the completed report through BSI Online within ten days.
- If the tester cannot legally handle the device type, switch before the deadline slips.
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 publishes one of the cleanest annual-testing workflows in the pilot set: test at installation and at least once per year thereafter, then submit electronically through BSI within ten days.
official program page
Lewisville tester list
Lewisville publishes one of the cleanest annual-testing workflows in the pilot set: test at installation and at least once per year thereafter, then submit electronically through BSI within ten days.
official list
BSI Online for Lewisville submissions
Lewisville publishes one of the cleanest annual-testing workflows in the pilot set: test at installation and at least once per year thereafter, then submit electronically through BSI within ten days.
official vendor portal