Aqua-Flash® Hot Water Recirculation Kit for Tanks with Single Pipe System. Includes pump, Aqua-Flash® Bypass Valve, Brass Tee and Stainless Steel Hose. No Electricity needed under sink. Install the bypass valve on hot angle stop with the hose and Tee on the cold angle stop. Maintains the temperature at the fixture of 90 F degrees. Pump installed on hot water tank.