If you have a sprinkler system where you use reclaimed ... a shut-off valve handle or a ball valve on it. How To Test Whether A Sewer Backflow Preventer Device Is Working It's important to test ...

They are common on residential sprinkler systems ... Some water districts require commercial buildings to test their backflow preventers frequently. The change caught many in the backflow ...

Starting with your sprinkler system ... any water by using a screwdriver to turn the test ports to release any water that is in the backflow preventer. For a visual, here’s a report from ...