How to Install a Hot Water Recirculating Pump on a Tankless Water Heater

Introduction

Installing a hot water recirculating pump on your tankless water heater can significantly improve your hot water delivery system, providing convenience and reducing water waste. This article will guide you through the step-by-step process of installing a hot water recirculating pump, from preparing the tools and materials to testing the system.

Tools and Materials Needed

Hot water recirculating pump kit ensuring compatibility with tankless systems Pipe fittings and connectors Insulation for exposed pipes Adjustable wrench Screwdriver Teflon tape Drill (if necessary for mounting) Safety goggles and gloves

Step-by-Step Guide to Installation

1. Turn Off Power and Water Supply

Be sure to turn off the power and water supply to the tankless water heater to prevent leaks and electrical hazards.

2. Choose the Right Location

Select a convenient location for the pump, typically near the water heater, to minimize the length of the pipe needed for installation.

3. Install the Pump

Follow the manufacturer's instructions for mounting the pump. Use Teflon tape on threaded connections to prevent leaks.

4. Connect the Return Line

Connect the return line from the furthest fixture back to the pump if your system requires it for hot water recirculation. For systems without a dedicated return line, install a valve under the sink to create a return path.

5. Connect to the Water Heater

Connect the pump's outlet to the hot water outlet of the tankless heater. Make sure all connections are tight and secure.

6. Install a Timer or Thermostat (Optional)

Some recirculating pumps come with timers or thermostats to help save energy. Install according to the manufacturer's instructions if desired.

7. Insulate Pipes

Insulate any exposed hot water pipes to reduce heat loss and improve efficiency.

8. Turn On Water Supply and Check for Leaks

Gradually turn the water supply back on and check all connections for leaks. Tighten as necessary.

9. Power On the Pump

Restore power to the pump and test the system by running hot water at various fixtures to ensure it is functioning properly.

Safety Tips

Always follow manufacturer guidelines and local plumbing codes. If you are uncomfortable with plumbing or electrical work, consider hiring a professional.

Conclusion

Installing a hot water recirculating pump on your tankless water heater can significantly enhance your hot water delivery system. Ensure all connections are secure and thoroughly test the system after installation to achieve the best results.