The EcoSmart 1.5 Gallon Mini Tank Water Heater saves water by eliminating the wait for hot water to reach the faucet. Simply tap into the water line and install the heater directly at the sink. No need for costly recirculating lines and pumps. And when you want to eliminate the wait for hot water but need more volume, install the heater in-line with a larger hot water source, such as a tankless heater or a storage tank heater. Lightweight and compact, this unit plugs into a standard 110 volt outlet.