AquaMotion Hot Water Circulation Kit for Indoor Tankless Heater Without Built-In Pump

For TANKLESS HEATER WITHOUT BUILT-IN PUMP for Single Pipe Systems AM7 AquaMotion Stainless Steel Circulator with a built-in timer and a 10 Ft line cord. AMK-ODR bypass valve kit (ODR Valve, 2 Ft. Stainless Steel Hose & Tee), Bypass Tee 3/4" MNPT x 3/4" MNPT x 3/8" OD Compression Two 3/4" NPT Male Tail Pieces with 1" Union Nuts and Gaskets, 2 Ft. Stainless Hose.TheAquaMotion ODR Valveis a small, quiet, lead free stainless/brass hot water recirculation valve for single pipe systems. It installs at the fixture furthest from the tankless hot water heater. It acts in conjunction with the circulator to supply hot water using the Built-in Timer. The ODR Valve mounts below the fixture between hot and cold supply lines. When hot water is called with the Built-in Timer, the circulator forces the cooled hot water in the hot water line into the cold supply line which returns it to the hot water heater. As hotter water reaches the ODR Valve it closes until a 95F temperature is reached at which point the valve automatically adjusts to maintain this temperature.