This assembly features a domestic water heater mounted on a concrete pad with a drain pan and sensor probe for leak detection. The unit connects to a domestic hot water supply line and a cold water make-up line, which includes a circulating pump and an aquastat. An American Society of Mechanical Engineers pressure and temperature relief valve is piped to a sanitary sewer, while the heater base drains into a floor sink with an air gap. Electrical components include a disconnect switch with flexible conduit and a Water-COP receiver plugged into a 115 volt alternating current outlet.
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