Backflow Assembly Test Guidelines

In order to test within Washington Water Service's service areas, State Certified Backflow Assembly Testers must provide proof of and maintain the following documentation:

Form Options

Testers may use the standardized Test Report Form or their own form as long as it includes all of the required information.

Submitting Test Reports

When submitting test reports you must:

We reserve the right to reject test reports that are incomplete and/or inaccurate. Submittal of inaccurate test reports may result in denial of report forms and/or a requirement to retest the backflow assembly. We reserve the right to randomly check submitted test results.

Form Requirements

The following information is required on all submitted test report forms:

  1. BAT Certification Number
  2. Name: Name of business or property owner
  3. Address: Building or residence street address
  4. Device Location: Physical location of the device such as next to meter, in riser room, 2nd floor under sink, etc.
  5. What the Cross-Connection Hazard Is: Backflow devices isolate such things as irrigation systems, Co2 dispensing machines, boilers, etc.
  6. Size/Type: Size and type of backflow preventer such as ½" DCVA
  7. Model Number/Model: Use complete model number such as 009M2QT or 950XLT
  8. Manufacturer
  9. Name/Serial Number: Be accurate. Include alpha prefixes such as A127841.
  10. Proper Installation: Forms must note if the assemblies were installed in accordance with the installation requirements. If an assembly does not meet these requirements, the discrepancy must be recorded in the comments section.
  11. Comments Section: Record any comments or discrepancies in this section. For example, if an assembly does not meet the proper installation requirements, note the reason here.
  12. Test Results: Include the following:
    • Valves required for each check valve tested
    • Repair information and details
    • Final test results
    • Test equipment information: Gauge, make, model, serial number and verification date
  13. Certified Tester Information: All test reports must include:
    • Tester's name (printed legibly)
    • Telephone number
    • BAT certification number
    • Gauge serial number
    • Gauge verification accuracy
  14. Person Repairing Information: Printed or typed name of person repairing assembly