I have a small rainbird sprinkler system I installed that comes off my hose bibs. I use a Orbit water timer on the sprinkler zones. The backflow preventers that came with the rainbird system restrict the water flow so much that the heads won’t pop up. I tried using shark bite in-line check valves and they still restrict the flow to much. My question is if I’m using a water time do I need a backflow preventer ? And if I need one do they make such a thing as high flow check valves or backflow...
Backflow preventer
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