The Haws 9400LPS AXION® Low Pressure Steam Water Heater replaces hot water tanks when pressurized steam is available. When an emergency shower or eyewash is activated, the flow of water opens a steam control valve. The steam enters a brazed plate heat exchanger, instantly heating the water. An ASSE 1071 certified mixing valve blends hot and cold water to produce an output of 80® F (27® C ) tepid water. Additional valves keep the system preheated, freeze protected and scald protected. The steam valve will remain closed should there be a loss of water pressure.