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Backflow testing
Backflow Testing and Prevention in Ann Arbor
Irrigation systems, boilers, pools, water-powered sump backups and many commercial systems connect to the drinking water supply. A backflow preventer keeps that water from flowing back, and it has to be tested.
- Lawn irrigation
- Boilers
- Water-powered sump backups
- Commercial
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Why it matters
What Backflow Prevention Does
If water pressure in the city main drops, during a main break or heavy firefighting, water can be pulled backward out of your plumbing. Without protection, water from a sprinkler system, boiler or pool could be drawn into the drinking water supply.
A backflow preventer is a valve assembly that only lets water flow one way. Because the parts wear, the assemblies need testing on a schedule.
City of Ann Arbor
How Backflow Testing Works in Ann Arbor
From the city’s Cross Connections and Backflow Prevention program.
Know your devices
Lawn irrigation, boilers, in-ground pools, heat exchangers, solar heating, private wells and some commercial uses are among the cross connections the city tracks.
Certified testing
The device is tested by a tester certified by the State of Michigan (EGLE).
Report to the city
Test results go to the city, which offers an online report form and a list of certified testers.
City inspection
The city inspects and reports to the state as part of its cross-connection program.
FAQ
Backflow Testing Questions
Do I need a backflow test for my lawn sprinkler?
If your irrigation system is connected to the drinking water supply, it needs a backflow preventer, and the city’s cross-connection program calls for periodic testing. Check the city’s backflow page or call its backflow line at 734-794-6339 for your property’s schedule.
Who can test a backflow preventer?
In Ann Arbor, the city asks for testing by a tester certified by the State of Michigan. The city publishes a list of certified testers serving the area.
Does a water-powered sump backup need a backflow preventer?
Yes. A water-powered backup pump connects the drinking water to the sump pit, which is a cross connection. It needs an approved backflow preventer, and testing under the city’s program.
What happens if my backflow preventer fails the test?
It is repaired, usually by replacing worn seals, springs or check valves, or replaced, then retested and the passing result reported.
Do businesses need backflow testing?
Many commercial systems, such as fire sprinklers, boilers, carbonated beverage dispensers and process equipment, require backflow protection and testing. The requirements depend on the hazard.
Also helpful
Related Plumbing Services
Problems in one part of the plumbing often point to another. These services go hand in hand.
Sump Pumps
Sump pump repair, replacement and backup pumps, including the pumps installed under Ann Arbor’s old footing drain program.
Learn more →Repiping & Water Lines
Old galvanized and failing pipe replaced, and water service lines from the curb stop to the house.
Learn more →Commercial Plumbing
Restaurants, offices, rentals and multi-unit buildings: jetting, grease traps, backflow, repiping and maintenance.
Learn more →24/7 in Ann Arbor & Washtenaw County
Backflow Test Due?
Call (734) 228-7852 or send a request with your device type and address.
Request service
Tell Us What’s Going On
Send a few details and we will call you back to talk it through and set up a visit. We answer 24/7: for water running or sewage backing up right now, call (734) 228-7852.
- 24/7 emergency service, nights, weekends and holidays
- $99 diagnostic fee, applied to the repair
- Financing: 25 months same as cash, on approved credit
- The price explained before work starts
- Call(734) 228-7852
- Service areaAnn Arbor & Washtenaw County
- LicensingMichigan plumbing license #A111705
Request Commercial Service
Property managers, landlords, restaurants and offices: tell us about the building and the problem.
No obligation. By sending, you agree we may call, text or e-mail you about this request. Calls may be recorded. Privacy Policy