RPZ Valve Testing Naperville, IL | Wiz Plumbing

When You Need Expert RPZ Valve Testing

Most municipalities require annual testing of RPZ valves to ensure they're functioning properly. Our certified testers provide quick, professional testing and submit results directly to your water authority.

We test all makes and models of backflow preventers and can repair or replace valves that fail testing. We'll remind you when your annual test is due so you never miss a deadline.

RPZ Testing Services:

Annual RPZ testing
Backflow preventer testing
Certification filing
Failed test repairs
Valve replacement
Winterization
Spring activation
Testing reminders

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Common Questions

Everything you need to know about rpz valve testing

How often does an RPZ valve need to be tested?

Most Illinois municipalities require annual testing of RPZ and other backflow prevention devices. The test must be performed by a certified backflow tester and the results submitted to the local water authority. Some municipalities send reminders; others issue violations if the test isn't completed by the deadline.

What happens during an RPZ test?

A certified tester uses specialized gauges to verify that the check valves and relief valve inside the RPZ are functioning within acceptable parameters. The test takes about 15-20 minutes. We check that each component opens and closes at the correct pressure differentials. Results are recorded on a standardized form and submitted to your municipality.

What happens if my RPZ valve fails the test?

If a valve fails, it usually means one of the internal components (check valves or relief valve) isn't sealing properly. Most failures can be repaired by replacing the internal rubber kits — a relatively inexpensive repair. We carry common repair kits and can often fix and re-test the valve in the same visit.

Who is responsible for RPZ testing — the homeowner or the village?

The homeowner is responsible for ensuring their backflow preventer is tested annually and maintaining it in working condition. The municipality establishes the requirement and tracks compliance. If you don't submit a test report by the deadline, you may receive a violation notice or have your water service affected.

Can you test my RPZ valve in the spring when you activate it?

Yes, and we recommend it. Spring activation and annual testing go hand-in-hand. When we reactivate your RPZ valve after winter, we check for freeze damage, reassemble the valve, turn on the water, and perform the annual test all in one visit. This ensures your valve is working properly before the irrigation season begins.

Do you submit the test results to my village?

Yes. After testing, we complete the required certification form and submit results directly to your local water authority. We keep records of all tests for your reference. We also send annual reminders so you never miss your testing deadline and risk a compliance violation.

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