Stay Compliant & Safe: How Often Should Your Backflow Preventer Be Tested?

Backflow preventers are unsung heroes in our plumbing systems. These essential devices protect our potable (drinkable) water supply from contamination by preventing the unwanted reverse flow of non-potable water or other substances.

But like any mechanical device, they aren't infallible and require regular attention to ensure they're working correctly.This leads to a crucial question for property owners and managers:

How often should backflow preventers be tested?

The General Rule: Annually

For most situations and types of backflow prevention assemblies (like Reduced Pressure Zone (RPZ), Double Check Valve (DCVA), and Pressure Vacuum Breaker (PVB) assemblies), the standard answer is at least once per year.Why annually?

• Mechanical Wear: Backflow preventers contain internal seals, springs, and moving parts that can wear out, degrade, or become fouled with debris over time.

• Ensuring Protection: Annual testing verifies that these internal components are functioning correctly and will operate as designed during an actual backflow condition (either backpressure or backsiphonage).

• Regulatory Compliance: Most local water authorities and plumbing codes mandate annual testing by a certified professional. Failing to comply can lead to warnings, fines, or even water service disruption.

Exceptions and Important Considerations

While annual testing is the baseline, several factors can influence the required frequency:

1. Local Water Authority Requirements: This is the most critical factor. Your specific city, county, or water district sets the definitive rules. Always check their specific regulations, as some may require more frequent testing, especially for certain types of facilities or higher-hazard situations.

2. Hazard Level: Facilities deemed "high-hazard" (e.g., hospitals, chemical plants, industrial facilities, mortuaries) might face stricter testing schedules (sometimes semi-annually or quarterly) due to the severe consequences of potential contamination.

3. After Installation: A brand-new backflow preventer must always be tested immediately upon installation to ensure it was installed correctly and is functioning properly before being put into service.

4. After Repairs or Maintenance: Any time a backflow preventer is repaired, cleaned, or has internal parts replaced, it must be re-tested immediately to confirm the repair was successful and the device is working according to specifications.

Who Performs the Test?

Backflow preventer testing isn't a DIY job. It must be performed by a certified backflow prevention assembly tester. These professionals have undergone specific training and use calibrated test equipment to accurately assess the device's performance according to established procedures.

Don't Risk It

Regular, certified testing is not just about compliance; it's about safeguarding public health. A failed backflow preventer can lead to serious water contamination events.

Staying proactive with annual (or as required) testing ensures your device is ready to protect your water supply when needed. Check with your local water authority for specific requirements and schedule your test with a certified professional today.