AquaMotion’s AquaMotionHOT recirculation kits AMH1K-1 and AMH3K-7 install under a sink in 10 minutes. The pumps are equipped with temperature sensor/switch to provide instant hot water and save up to 15,000 gallons of water from being dumped. It can be fully automatic or timer-operated. It features an estimated low operating cost of $2 to $4 annually. It is patented, U.S.-built and 100% tested in Warwick, R.I.