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Detached Member
Join Date: May 2003
Location: southern California
Posts: 26,964
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you need an air chamber in front of the valve. Shut off the water supply, put a T-connection (I'm assuming you have PVC), with the open T-connection facing up, put a length of PVC, say a foot, and a cap. Turn water on, the air in the vertical 1 foot pipe with the cap will compress the air in it and act like a cushion.
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Hugh
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