Backflow Prevention & Testing Services in Westminster

Annual Backflow Testing Obligations in Westminster

Westminster water customers must have a backflow device tested when it’s installed and annually afterward. Property owners are responsible for testing and maintaining service-protection devices, then providing proof of testing and the results to the City’s Cross-Connection Control team annually or upon request.

Westminster Municipal Code 8-7-27 and CDPHE Regulation 11.39 govern annual testing and maintenance requirements. Although testing is generally annual, the Utilities Operations Manager can require semi-annual testing when the degree of hazard warrants more frequent review.

A failed test means the device hasn’t demonstrated proper operation. The device requires evaluation and corrective work, which may include Backflow Device Repair, before retesting can produce a passing result.

Backflow Device Types for Different Property Hazards

The required device depends on the property’s water use, contamination hazards, and applicable local requirements. A device type shouldn’t be assigned to an individual property without assessing those factors.

Common device categories include:

• Reduced pressure zone devices
• Double check assemblies
• Pressure vacuum breakers

A reduced pressure zone (RPZ) device is the assembly Westminster requires inside the structure, after the main shut-off valve, on all non-single-family residential water service lines. An RPZ device is also required for non-residential irrigation services that use domestic or reclaimed water.

Irrigation systems, fire lines, and commercial or multifamily properties can present different hazards than a typical single-family water service.

Backflow Test Results & Documentation

Backflow Testing verifies whether an installed prevention assembly is operating as required. A certified tester uses testing equipment to evaluate the device and record the result. A passing result supports the compliance documentation required for the property.

The result determines the next steps:

• Passing assembly: Retain proof of testing and the recorded result for annual reporting or a City request.
• Failed assembly: Arrange corrective work and retesting before seeking a passing result.
• Installation concern: Evaluate whether Backflow Prevention Installation is needed based on the property and local requirements.

Before hiring a tester, property owners should confirm who will provide the required test documentation and results to Westminster’s Cross-Connection Control team.