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Instant Hot Water Recirculating System

Watts Instant Hot Water Recirculating System brings convenience and savings to your home, giving you hot water instantly at every faucet or shower when you need it.

Product Demonstration

This unique product connects easily to
existing plumbing. It saves up to
15,000 gallons of water per year and
up to 10% of your water bill.

Click here to watch the Instant
Hot Water Recirculating System demo.


  • Easy to install under one hour
  • 24 hour programmable timer activates pump only when you need it
  • Maintenance free
  • Pump mounts directly onto a water heater with 3/4" connections
  • Can be used with all types of pipe
  • 10 foot power cord
  • 1/2" thermal bypass valve
  • Extremely quiet - no vibrations
  • Cost $0.05 a day to operate
  • This product is available through retail stores only

How it Works

A pump with a built-in timer is installed on the hot water line from the water heater.

A patented sensor valve opens when the water on the hot water side cools and pushes the cool water back to the water heater.

As the temperature in the hot water line hits 98º the valve closes.

Some homes are designed with multiple hot water loops, one per floor, etc. If one section of the house does not receive hot water, you will need to purchase a Watts Sensor Valve Kit for each loop.

For best results, the valve should be located at the faucet furthest from the water heater in each loop.

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Additional Information

Danger – Scalding Lurks!

Every year, thousands of people suffer serious thermal shock or scalding injuries in their bathtubs, sinks and showers.

Click here for informative resources to help you protect against these dangers.

Learn About

Thermostatic Mixing Valves

Every year thousands suffer injuries as a result of hot water scalding and thermal shock injuries. Thermostatic mixing valves protect against these dangers.

To learn more about thermostatic mixing valves and how they work, click here.