https://www.amazon.com/dp/B000JG81AQ/
Grundfos GRU-595916 595916
Brand Grundfos
Color Black
Material Bronze, Stainless Steel
Style Circulator
Product Dimensions 10″L x 10″W x 10″H
Power Source Corded Electric
Item Weight 6.06 Pounds
Maximum Flow Rate 9 Gallons Per Minute
Voltage 115 Volts
TLC = Timer, Line Cord, 6-Foot
Flow range: 0 – 9 U.S. GPM, Head range: 0 – 6-Foot
Motors: Single phase, 115V. Supply Voltage:115-120 VAC, 60 hertz, Contact Rating: 16 amps
Connection: 3/4-Inch M by 3/4-Inch FNPT.Maintenance-free, low energy consumption, easy to install, quiet running
The Grundfos circulator pumps, Series UP, are specifically designed for heating systems. The pumps are also suitable for circulation of hot domestic water and for circulation of liquid in cooling and air-conditioning systems
https://www.amazon.com/dp/B004Q04AWO/
Watts Premier WP596816 Replacement Sensor Valve Kit for Instant Hot Water Recirculating Pump System, 2 x 12 Inch Supply Lines & Valve
Material Stainless Steel
Brand Watts Premier
Item Dimensions LxWxH 12 x 2 x 2 inches
Exterior Finish Silver
Inlet Connection Size 0.38 Inches
Inlet Connection Type National Pipe Tapered
Valve Type hot water supply line
Must be used in conjunction with Watts Instant Hot Water Recirculating Pump, this item; for branched hot water lines ensuring hot water throughout; no additional pumps needed, install at the branched water lines or at furthest point in the home
Kit includes one sensor valve, two 12 inch supply lines with fittings, and two mounting screws; uses 1/2 inch male pipe thread connections, 1/2 inch FTP to 3/8 MTP supply lines and 1/2 inch FTP to 3/8 inch MTP supply adaptors
Extremely quiet and energy efficient this system supplies instant hot water in about 15 seconds at every faucet or shower when needed and helps eliminate wasted water using thermal by-pass technology with no return line or under-sink outlet required
A sensor valve opens when the water on the hot water side cools, pushes the cool water back to the water heater, and closes when hot water line hits 98º F; this kit is used if multiple hot water loops present
Can be used with all types of pipe, and is only for indoor use on standard tank water heaters for residential buildings; cannot be used with tankless water heater or outdoors
