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Reducing Water Hammer by Lowering Flow or Using Low‑Flow Nozzles

Owner has “banging” pipes when valves close. Asks if switching to water‑saving spray heads helps.

Answer

First, turn down the flow control on the valve. If that doesn’t help, replace nozzles with low‑flow versions (e.g., 0.6 GPM instead of 1 GPM) and run zones longer. This reduces velocity and hammer.

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