Designed for plumbing systems without a recirculation line, the ecocirc wireless instant hot water system from Bell & Gossett, a Xylem brand, uses electronically communicated motor technology to operate using as little as 20 watts of power. Installed under the sink, the system’s battery operated paired valve, equipped with an onboard temperature sensor and wireless RF transceiver, communicates with the circulator pump mounted to the water heater or hot water source to deliver temperature-controlled hot water.