Yes — backflow prevention is required by law in Spokane Valley and across most of Washington and Idaho. Lawn irrigation systems, fire sprinklers, commercial buildings, and any cross-connection between drinking water and non-potable systems must have an approved backflow assembly that is tested annually.
Where the law applies
- All lawn and landscape irrigation systems
- Fire sprinkler supply lines
- Commercial and industrial cross-connections
- Boilers, cooling towers, and certain medical equipment
- Hose-bib connections in some jurisdictions
Annual testing is required and the results must be submitted to your water purveyor. We’re certified to install, test, and file results — see backflow prevention and PVB service.
