To increase the overall efficiency of a domestic hot water recirculating system and to reduce water wasted while waiting for hot water, the e³Timer can be installed on the e³ circulator. The timer is easily installed by removing the motor end cap, plugging in the timer and setting the timer schedule without any wiring. The timer can be used in 3-different selections: ON, OFF and Timer. The On selection operates the pump continuously, the OFF selection turns the pump OFF and the TIMER selection (depicted by a clock on the timer) turns the pump on when programmed.