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Series 70A, L70A Hot Water Extender Tempering Valves are used in residential water supply applications to mix cold and hot water to extend capacity of water heater storage tanks and hot water boiler tankless heaters. It features brass body construction, dial adjustment cap, replaceable thermostat, stainless steel spring and is available with either threaded or solder end connections . Series 70A temperature range: 120F to 160F. Series L70A temperature range: 100F to 130F. Maximum Pressure: 150psi (10 bar).