Hot Water Recirculation Pump
Hot Water Products

Hot Water Recirculation Pump

Availability: In Stock
  • Vendor:Watts
    *Not Applicable for all promotions
$ 238.95

As seen on The Today Show

As seen on The Morning Blend.

The Watts Premier Hot Water Re-Circulating pump with timer provides water in an instant to your faucet or shower, eliminating water waste caused by waiting for water to heat up. This pump offers quiet, maintenance-free operation and includes a programmable timer that can be set to activate the pump only when you need it or set it to run 24 hrs a day.

The device uses the pump at the water heater and a patented under-sink sensor valve designed for installation under the sink that is the furthest away from the water heater. This combination creates a pressure differential that allows the cold and cool water in the hot water supply line to bypass (at a low volume) into the cold water supply line through the thermostatically controlled sensor valve, keeping the water in the hot water supply line at a "no-wait" temperature throughout the home.

Caution: This system is not designed for tankless water heaters.

How much water is wasted while waiting for it to get hot?

An average home has approximately 125' of 3/4" piping.
125' of 3/4" pipe holds 3.14 gallons of water.
10 draws per day wastes over 31 gallons of water waiting for the water to get hot.
Over a year, the wasted water equals 11,461 gallons.

Click here to download your 500800 Product Manual

Cross Reference/Associated Item#:

# WP500800


The Watts Premier Hot Water Re-Circulating pump with timer works with any standard hot water tank heaters. Designed for use in Home and Business applications.

California Prop 65 Warning CALIFORNIA PROP 65 WARNING: This product can expose you to chemicals including lead which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to








Parameter Minimum Maximum
Operating Temperatures: 36°F (2°C) 150°F (66°C)
Operating Pressure: N/A 145 psi
Flow Range: 0 U.S. GPM 3.4 U.S. GPM
Head Range: 0 ft 3.5 ft
Power Input: N/A 115V
Motor: N/A Single Phase
Parameter Inlet Outlet
Connector: 3/4" FPT 3/4" NPT


  • (1) Hot Water Recirculation System with timer
  • (1) Sensor Valve
  • (2) Valve mounting screws
  • (2) 3⁄8" compression to ½" threaded flex hoses (2) Adapters
  • (2) Rubber washers
  • (1) Installation and Operation Instructions

Product Dimensions

  • Width 1 3/8 in
  • Length 4 5/16 in
  • Weight: 6
  • Features

    • No return line required
    • No electricity needed under the sink
    • Built-in 24 hr, 3 position timer with 10 ft cord and 115v plug
    • Uses less energy than a 25 watt light bulb
    • Thermal By-Pass Technology
    • Saves up to 12,000 gallons per year
    • Maintenance Free