Web the hot water recirculating pump, as the name indicates, creates a loop for the hot water to move across all the fixtures, taps, and faucets in your water circulation. Web some of the hot water recirculation systems come with timers to set the hours it operates. Web a pump at the water heater moves hot water through the recirculation line. Griccino says a hot water recirculating pump costs about $200, and many comfort systems can be. The other types of hot water.