To stop water pipes from hammering, you must eliminate the hydraulic shock wave by installing mechanical water hammer arrestors near fast-closing valves, securing loose pipes firmly to structural framing with cushioned mounting straps, draining the plumbing system to recharge air chambers, and lowering excessive household water pressure if it exceeds 80 psi by adjusting or replacing the pressure-reducing valve. These combined measures absorb shock and stabilize piping. Verification: Operate fast-closing fixtures and appliances to confirm that all banging and rattling sounds have stopped completely.
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