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What can I do to prevent water hammer in my system?
Water hammer can be very destructive to both pumps and pipe. If water hammer occurs when pumps shut down, it may be due to a check valve slamming shut as the water in the line reverses direction. If this is the case, there are a variety of slow closing check valves that can solve this problem.
Another cause could be air entering the suction side of a pump leading to cavitation, which can literally pull metal out of impellers and cause tremendous line surges. Air trapped in water distribution lines can also cause water hammer. Air/vacuum valves for well pumps and air release valves for pressurized lines can help solve these problems.
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