The AquaMotion AMH1K-7ODRXT1 is for tankless heaters without a dedicated return line. It can be used with tankless heaters in Southern Tier United States. The pump is freeze, insect and rain protected. It has a control box with an anti-tampering feature, 1/115/60, UL, ULC, and NSF 372 listed. Pump performance is 11 feet hd. by 14 GPM, with by-pass and ODR under-sink valve. This is a GREEN product, easy to install and service. U.S. design, patented and patent pending.