Domestic hot water supply, domestic cold water, and domestic hot water return piping layout featuring inline valves and equipment. The domestic hot water return line includes a domestic hot water pump designated PHWP-1, check valve, gate valve, and pressure or flow meter. The domestic cold water line features a check valve and isolation valves. Flow arrows indicate direction for domestic hot water supply, domestic cold water, and domestic hot water circulation lines transitioning to primary hot water supply, primary cold water, and primary hot water circulation.
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