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Water Hammer and Backflow Relief Valve Discharge

Old Toro Valve Seats Crack, Causing Pressure Spikes

System off but pipes bang and backflow preventer discharges? A valve closing too fast creates water hammer. Cracked seats in 1" Toro valves are common after 12 years. Replace the valve internals or the whole valve. No recent changes? It’s age-related wear.

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