Minnesota backflow testing rules
Minnesota's backflow rules are in the 2020 Minnesota Plumbing Code, Minnesota Rules 4714.0603 (cross-connection control), which amends the Uniform Plumbing Code's section 603.
Who sets the rules in Minnesota
Is an annual test required?
Minnesota Rules 4714.0603 require backflow devices and assemblies to be tested when installed, repaired or moved, and at least once a year after that, or more often where the local authority requires.
For testable assemblies (ASSE 1013, 1015, 1020, 1047, 1048 and 1056), Minnesota's code says inspection intervals may not exceed one year.
Source: Tested at installation, repair, relocation and every year
Which properties need a backflow preventer
Under Minnesota Rules 4714.0603, the person in control of a backflow device or assembly must keep it in good working condition, and a defective one must be repaired or replaced.
Who may do the test
Minnesota's plumbing code requires the test to be done by a certified backflow assembly tester following ASSE Series 5000.
Minnesota Statutes 326B.437 say no one may test a reduced pressure zone backflow prevention assembly without a backflow prevention rebuilder certificate or a tester certificate from the commissioner.
Sources: A certified tester, to ASSE Series 5000; Testing an RPZ needs a state certificate
How the test report is filed
The tester dates and signs a tag on the assembly with their Minnesota tester certification number, and on a community public water system the test records go to the local authority and the water supplier within 30 days.
The public water supplier must be told within 30 days after a testable backflow prevention assembly is installed on a community public water system, and within 30 days after one is removed.
Shakopee Public Utilities requires every backflow test to be done by an ASSE certified tester, who submits it through The Compliance Engine within 30 days of the test.
Sources: Tag the assembly and send records within 30 days; Shakopee: tester files within 30 days
Finding a tester
Shakopee Public Utilities publishes a list of qualified testers in the area for its customers; it notes the list is not an endorsement.
Common questions
Is backflow testing required every year in Minnesota?
Yes. Minnesota Rules 4714.0603 (the 2020 Minnesota Plumbing Code) require backflow devices and assemblies to be tested at installation, repair or relocation and at least once a year after that, by a certified backflow assembly tester.