WSSC Backflow Test Report: What It Covers and How to Get One

What a WSSC Backflow Test Report Contains

A WSSC backflow test report is a formal record of a certified tester's inspection of your property's backflow prevention assembly. The report verifies whether the device is functioning correctly and meets the water safety standards required by the Washington Suburban Sanitary Commission. Every report includes the assembly's make, model, serial number, location, and test results for each check valve and relief port. Tester name, license number, test date, and pass-or-fail status are also recorded. If any component fails, the report notes the specific deficiency so repairs can be performed promptly.

Why WSSC Requires Backflow Testing

WSSC operates under a cross-connection control program designed to protect the public water supply from contamination. Backflow can occur when pressure changes in the plumbing system draw non-potable water — from irrigation lines, boilers, fire sprinklers, or industrial processes — back into the drinking water supply. The WSSC backflow test report serves as proof that the prevention assembly is in working order. Properties with identified cross-connections, including commercial buildings, multifamily residences, and institutions, are typically required to submit these reports annually or on a schedule set by local regulations.

Common Findings in a WSSC Backflow Test Report

Test reports often reveal issues that range from minor adjustments to full assembly replacement. A stuck check valve, worn seals, or debris in the relief port can cause a device to fail its initial test. Low upstream or downstream pressure during the test can also produce marginal results that require a follow-up visit. When a report flags a failure, the responsible party — typically the property owner or manager — must arrange repairs and a re-test within a defined timeframe. Submitting an outdated or incomplete report can lead to water service notices from WSSC.

Typical Pass/Fail Criteria

• Check valves must hold pressure within the allowable leakage threshold.
• Relief valves must open at the correct differential pressure.
• Air gaps and reduced-pressure assemblies must maintain proper zone separation.
• All readings must be recorded at steady-state flow conditions.

How to Obtain a WSSC Backflow Test Report

Scheduling a test is straightforward. Contact a WSSC-approved certified backflow tester, who will visit the property, perform the required gauge checks, and complete the official report form. Many testers offer online submission, so the report can be uploaded directly to WSSC's portal or sent via email. Keep a copy for your records and confirm that WSSC has received the document, especially if your property is under a compliance order.

After the Report: Repairs and Re-Testing

If the WSSC backflow test report shows a failure, the next step is to hire a licensed plumber or the original tester to service the assembly. Repairs may involve replacing seals, springs, or the entire device. After work is completed, a re-test is performed and a new report is issued. WSSC typically accepts the updated report as evidence of compliance. Staying on top of maintenance schedules helps avoid service interruptions and keeps your property aligned with regional cross-connection control rules.