Residential

A backflow prevention assembly is required on lawn irrigation systems.

A backflow prevention assembly may be required on certain types of residential businesses.

Commercial

A backflow prevention assembly is required on lawn irrigation systems.

A backflow prevention assembly is required for certain types of businesses.

Testing

It is required by law that all backflow assemblies be tested annually. Public Law 99-399-Safe Drinking Water Act Amendments of 1996 10 CSR 60-11.010.

If you are moving into new construction, please send us a copy of the initial Backflow Prevention Assembly Test Data.

All backflow prevention assemblies must be tested annually and a copy of the Backflow Prevention Assembly Test Data sent to our office.

If you have any questions concerning backflow prevention assembly requirements, please contact Lori at our office at 636-296-7053.

For a list of state approved backflow prevention assembly testers, please click here.