Pressure Reducing Valves Pressure reducing valves can help to reduce water hammer in many instances. But they can also be the source of noise in certain cases. They must be sized properly. If your house piping is sized correctly - most residential houses should have 3/4 inch piping feeding all the main branches - then you should install a 1/2 inch size water pressure reducing valve. Gate Valves If you install a 3/4 inch valve on a 3/4 inch line, the valve will not always function as designed. This can result in poor pressure control and excessive valve noise. ALWAYS READ the installation instructions to make sure you are putting the right valve in place.

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