WATTS RECIRCULATING HOT WATER PUMP: Provides hot water at every faucet or shower when needed, eliminating wasted water, 0.5 inches bypass value. BEST SELLING RECIRCULATING SYSTEM: Conserve up to 15,000 gallons of water per year. Save up to 10% of your water bill. It costs only $0.05 per day to operate. EASY INSTALLATION: Install in less than 1 hour. This unique product easily connects to existing plumbing and is maintenance-free. WATTS HOT WATER RECIRCULATING SYSTEM: The kit includes a pump with timer, 2 adapters with rubber washers, valve mounting screws, sensor valve, and two 12-inch supply lines. RECIRCULATING PUMP WITH TIMER: 24-hour programmable timer activates pump when you need it. No vibrations: it’s extremely quiet compared to other systems in the market. Do not use with tankless water heaters. Insert the 115V plug on the line cord from the pump into a properly grounded 115V outlet.