Annual certified backflow preventer testing for commercial properties across Wayne, Oakland, and Macomb counties. Michigan DEQ compliant, test reports filed with your water authority on your behalf.
Backflow prevention assemblies protect the public water supply from contamination by preventing water from flowing backward from a commercial property's plumbing system into the municipal water supply. Michigan's Safe Drinking Water Act, enforced by the Michigan Department of Environment, Great Lakes, and Energy (EGLE), requires that all backflow prevention assemblies on commercial properties be tested annually by a certified tester.
Most Metro Detroit municipalities — including Detroit, Troy, Southfield, and others — have their own backflow prevention programs that require test results to be filed with the local water authority each year. Missing or overdue tests result in notices of violation and can ultimately result in water service shutoff.
Test reports must be submitted to the appropriate water authority by the deadline specified in each municipality's program. Guardian handles all testing and report filing so nothing slips through the cracks.
Many property managers don't realize they have multiple backflow preventers — one for domestic water, one for irrigation, and one for fire suppression. Guardian inventories all of them.
Any commercial property connected to the public water supply with a potential cross-connection hazard requires annual testing. This includes virtually all commercial buildings:
Guardian inventories and tests all backflow prevention assemblies at your property, covering every connection type and hazard level.
The highest level of backflow protection, required for high-hazard connections. Tested for relief valve operation, check valve function, and differential pressure.
Used for moderate-hazard applications. Both check valves tested for proper seating and differential pressure compliance.
Common on irrigation systems. Tested for proper operation under both static and flow conditions.
Dedicated backflow preventers on fire suppression water supplies, tested in coordination with your fire system requirements.
Guardian handles the entire backflow testing cycle including report filing with your water authority and any repair or replacement needed.
We locate and document all backflow preventers at your property — many owners are unaware of how many they have.
Michigan-certified backflow testers perform all required tests using calibrated equipment.
We submit test reports to your local water authority on your behalf, meeting all municipal deadlines.
Any failed assemblies are repaired or replaced through our licensed plumbing contractor network.
We track your annual testing cycle and schedule proactively so deadlines are never missed.
We'll inventory your assemblies and get you on a compliant annual schedule — at no cost to assess.