Excessive pressure in water service connections can waste considerable amounts of water.  The Massachusetts plumbing code (248 CMR 10.14(g) Excessive Water Pressure) requires that a pressure reducing valve be installed on the water service connection to a building when the pressure is eighty (80) pounds per square inch (psi) or greater. Maintaining water pressure within the regulatory limit conserves water.

Water utilities should evaluate existing water system regulations in order to ensure compliance with this regulatory requirement. This evaluation could include the establishment of maximum pressures for users as a conservation measure. Water suppliers should map their jurisdictions to show areas in which water pressure may exceed the limit in the absence of pressure-reducing valves. They should recommend to and assist the plumbing inspector in conducting periodic surveys to determine whether the pressure reducing valves are functioning properly, and take remedial action as needed.

23.a    The Department of Environmental Protection should require pressure mapping and compliance with the pressure limits as a requirement for Water Management Act withdrawal permits

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