What is a recirculating heat pump and why would you need one?

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A recirculating heat pump is basically what it sounds like; a pump that recirculates hot water throughout your home

The pump is installed on top of a water heater and plugs into a nearby electrical outlet. In a traditional water heater setup, hot water goes directly from your water heater to your faucets and fixtures. The water that remains in the pipes in between uses cools down and becomes cold water. This causes the need to wait for hot water each time you turn the faucet back on. The time it takes for the hot water to travel through the pipes from your water heater can vary depending on the size of your home and how far the water needs to travel. A recirculating pump helps reduce the time you have to wait for hot water and also helps to reduce water waste making it a double win!


A recirculating heat pump helps to save water by drawing the unused hot water back to your water heater via a recirculating manifold, or if your home was built with a recirculating loop called a plumbing loop.

The manifolds (or plumbing loop) return the water to the water heater where it can stay warm, reducing the need to heat the additional water. A recirculating pump also helps avoid wasting water as you wait for it to heat up after turning a fixture on. When the unused hot water is drawn back to the water heater, new hot water is constantly pumped into its’ place. 


Think of the way a recirculating heat pump works like a highway that splits off into two lanes.

The first lane keeps going forward to your fixtures, while the other lane makes a U-turn (via the manifold or plumbing loop) and goes back in the direction that it came from. Having this system in place allows for hot water to be on demand at your faucets and fixtures while avoiding the need to heat extra water or waste cold water while you wait. 


One thing to note is that recirculating pumps are installed in addition to your water heater.

This means they are separate but work together to provide you with hot water on demand. Because they are separate units, if you turn off your water heater for any reason (going on vacation, living in a different city for part of the year, etc.) you will also need to turn off or unplug the recirculating pump. If you do not, the pump will continue trying to circulate the nonexistent water and will burn up the pump’s motor and cause it to stop working. If you are interested in scheduling an appointment to have a recirculating pump installed, you can call our office directly or email us here (hyperlink to contact us page). 

About Us

Instant Plumbing and Rooter LLC is a family-owned and operated plumbing business in Phoenix, AZ. We’re a family of reliable professionals that use the latest techniques for dependable plumbing services. Since 2001, we have been taking care of our community’s plumbing needs promptly and professionally.

Through our work, we aim to change the perception of plumbers in our community. Our goal is to make homeowners like you more informed, as well as show others that being a plumber is not just about unclogging toilets.

A plumber brings hygiene, sanitation, and comfort to everyone, and that’s what we’re here to help you with.

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