3: Consider the inlet water pressure. Pressure regulating valves can be direct acting, piston operated or externally piloted models.

Choose direct acting valves for flows ranging from low to moderate. For moderate to high flow rates, use piston operated or externally

piloted pressure reducing valves.
4: Choose the right valve size needed. Choosing the right size is critical to the longevity of the pressure reducing valve. Over-sized

valves will lead to noise, valve failure and wire draw during low flow conditions. If more than one size of valve meets your required

capacity, choose the valve that is less expensive and allows you to use smaller diameter pipes.
Warnings:
Direct acting valves are the most economical type of pressure reducing valves; but they are less accurate than the piston

operated and externally piloted valves.

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