Watts Hot Water Recirculating System, With Built In Timer, Provides Hot Water At Every Faucet Or Shower When Needed, Eliminating Wasted Water, Easy To Install On Any Water System & Requires No Additional Piping, Unique Design Of The Pump Ensures Quiet, Maintenance Free Operation, Includes A Built In 24 Hour, Dual Setting Programmable Timer To Activate The Pump Only When Needed, Whole House Hot Water Recirculating Pump, Recirculating Pump Mounts To The Hot Water Outlet On The Water Heater & The Sensor Valve Mounts Under The Furthest Lavatory In The House Run, Turns Plumbing Into A Re-Circulating Loop, Every Faucet Will Have Hot Water Instantly, On/Off Timer On Pump Activates The Pump When You Need Hot Water, Saves Over 15,000 Gallons A Year In Wasted Water, 120V Pump Motor With 10' Grounded Plug, Easy To Install.