Backflow prevention protects your drinking water from contamination — and for many properties, annual testing is not optional, it is required. A backflow preventer stops water from reversing direction and pulling contaminants from an irrigation system, boiler, or process line back into the clean supply. Because that device sits quietly on your line all year, the annual test is the only time anyone confirms it still works.
We are certified to test, repair, and install backflow prevention assemblies for both residential and commercial properties across Oakland County. We test the device, document the result, file the certification with your municipality, and repair or replace any assembly that fails — then retest to confirm it holds. If you have an irrigation system, a boiler, or a fire-suppression line, this is the service that keeps you compliant and your water safe.
When to call us for backflow testing
Your annual test is due
Most municipalities require certified backflow testing every year. Miss it and you risk fines or a shutoff notice.
You have irrigation or a boiler
Lawn irrigation, boilers, and process lines create a cross-connection risk that a backflow preventer is required to guard.
A device failed its last test
A failed assembly is not a paperwork problem — it must be repaired or replaced and retested promptly.
You're a commercial property
Restaurants, medical buildings, and multi-tenant properties almost always need annual certified testing on file.
What's included in our backflow testing
Every backflow testing job is a complete, documented service — not a quick patch. Here's what you can expect when our licensed team is on site.
- A certified test of each backflow prevention assembly
- Complete test documentation prepared for your municipality
- Repair or replacement of any device that fails, then a retest
- Filing of the certified results with your water authority
- A reminder cadence so you never miss next year's test
- Advice on freeze protection for exposed assemblies
Our process
- 1
Locate and test the assembly
We find each backflow preventer and run the certified test to confirm it holds against reverse flow.
- 2
Document the result
We record the test data and prepare the certification your municipality requires.
- 3
Repair or replace if it fails
A failed device is repaired or replaced with a proper assembly, then retested until it passes.
- 4
File the certification
We file the certified results with your water authority so your property stays compliant.
What affects the price
We never post fake prices. Here's what actually drives the cost — and we put the real number in writing before any work begins.
- Number of backflow assemblies to test.
- Residential vs. commercial property and device type.
- Whether a device fails and needs repair or replacement.
- Municipal filing and certification requirements.
- Access to the assemblies and any freeze-protection needs.
Why Bloomfield Hills homeowners choose Bloomfield Hills Plumbing for backflow testing
We've served Bloomfield Hills and Oakland County for over 17 years, hold a 4.9-star rating across 138 reviews, and back every job with a licensed Michigan master plumber. Here's what that means for your backflow testing.
Certified and thorough
We are certified to test, repair, and install backflow assemblies — and we handle the filing so compliance runs quietly in the background.
We fix failures fast
A failed device is a contamination risk and a compliance problem. We repair or replace it and retest, so you are covered promptly.
Residential and commercial
From a home irrigation system to a restaurant or medical building, we test and certify the assemblies your property depends on.
We keep you on schedule
Annual testing is easy to forget until a notice arrives. We set a reminder cadence so the deadline never sneaks up on you.
Backflow Testing & Prevention FAQs
Most Oakland County municipalities require certified testing every year, with the results filed with the local water authority. Requirements vary slightly by community and property type — we confirm your specific obligation and keep you on schedule.
A failed assembly has to be repaired or replaced and then retested — it is not just paperwork, because a failed device can let contaminated water reverse into the clean supply. We repair or replace it, retest to confirm it holds, and file the passing result.
If you have a lawn irrigation system, a boiler, a pool auto-fill, or certain other cross-connections, then generally yes — and it likely needs annual testing. We assess your setup and let you know what is required.
We file the certified test results with your municipality or water authority, which is what keeps your property compliant. You get a copy for your records, and we remind you before the next test is due.
Yes. We size and install the correct backflow prevention assembly for your application — irrigation, boiler, fire line, or process — to code, then test and certify it so it is compliant from day one.