The Laing E10 Tankless Pump is designed with a highly efficient electronically commutated permanent magnet motor (ECM/PM technology) specifically for retrofits and systems with tankless water heaters. No recirculation pipe is required. It is controlled by a timer and thermostat. A built-in temperature sensor automatically turns the pump ON and OFF. The pump is also equipped with a 24 hour adjustable timer providing the most cost effective method of operation.