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A state-certified backflow tester must test your backflow assembly annually. Many landscape companies are state certified.
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The irrigation backflow assembly for residences is due by May 30th
An annual test is the only way to know whether a backflow assembly is operating correctly. Our Backflow prevention program ensures water distribution system remains safe.
It also is required by The Department of Natural Resources. Community water systems must have backflow prevention in accordance with 10 CSR 60-11.010.
Backflow is the unwanted reversal of flow in a water distribution system. Backflow occurs due to backpressure or back-siphonage and allows non-potable substances to enter a public water system through an unprotected cross-connection.
Backpressure occurs when the pressure in a building’s plumbing exceeds the pressure in the water distribution system.
Backsiphonage occurs when there is a partial vacuum (negative pressure) in a water supply system, drawing liquid from the non-potable source into the water distribution system.
You can find more information https://dnr.mo.gov/print/document-search/pub0393
An annual test brings deficiencies to light. Backflow prevention protects public water systems from contamination or damage through cross-connections located in customer facilities. Backflow prevention is typically achieved by placing a backflow prevention assembly between the customer and the public water system. This is called containment backflow prevention.
If your Backflow Assembly fails the annual test, you must make any necessary repairs or replacements and have your system retested within 15 days.
The state-certified inspector should turn in the test results within 30 days of the report. We suggest retaining a copy of these for your own records.