Save 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 Eco smart heater in-line with a larger hot water source, such as a thankless heater or a storage tank heater. Lightweight and compact, these units plug into a standard 110 volt outlet.