I've replaced a couple of the damaged low flow heads out near the street with Hunter PGP rotors. As someone else stated, in our area it's a 1/2 line running to the heads, so I had to add couplers that go from 1/2 to 3/4 for the Hunters. They work really well and water pressure is not a problem. I actually had to adjust the heads as if they are open the whole way, the spray goes about 30 feet.
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