Loud Bang When Sprinklers Shut Off: Water Hammer Fix

House Shakes When Sprinklers Stop: Water Hammer Arrestor Needed

New house. Sprinklers shut off → loud bang felt in living room. Plumbers stumped.

Fast valve closure slams water column to stop → shock wave through pipes. Valves should close gradually but wear out.

Rebuild/replace last zone valves – Slow closure.
Install water hammer arrestor (air chamber) at point of connection in basement. Easy, now code in many areas.

Arrestor is cheaper and solves it even if valves aren't perfect.

Irrigation: Single Loud Bang on Last Valve Shutdown—Water Hammer Fix; Water Hammer on System Start/Stop—Broken Head and Pressure Regulator; Low Pressure on Distant Sprinkler Zones: Pipe Sizing and Nozzle Audit; Sprinklers Run Uncontrollably When Main Water Turned On; Pipe Hammer During Zone Transition: Zone 5 to 6 Shakes Pipes; Major Leak at Valve Box: Expose and Repair; Low Sprinkler Pressure After Line Flushing: Debris at Heads; Rooting Florist Roses: Care for New Plants from Cut Stems; Harvesting and Sowing Sundew Seeds: Timing by Species; Practical Home Improvement Tips from One Handyman to Another

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