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P-812.1 Pressure Relief
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An approved pressure relief valve shall be installed on all equipment used for heating or storing hot water and which forms part of a water supply system. The rate of discharge of such valve shall limit the pressure rise in the water supply system to 10% above the pressure at which the valve is set to open. Pressure relief valves shall be of the spring-loaded type with a pull rod and lever handle, or shall be of an equivalent approved type which will permit the manual operation and testing of the valve. Pressure relief valves shall be installed in the cold water supply to the heater or storage tank and adjacent to such heater or storage tank. In addition, an approved backflow preventer shall be installed on all equipment which is connected to the potable water supply when such equipment is used for any purpose other than supplying potable water to approved fixtures or as required by the Department.
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