Do I Need a Water Heater Recirculation Pump?

By Elizabeth Michael

December 18, 2025

If it takes a long time for hot water to arrive when you turn on a faucet, your home may be a good candidate for a water heater recirculation pump. Sometimes called hot water recirculation pumps, these handy gadgets keep hot water circulating through your plumbing system for faster access. Installing a recirculation pump means you won't have to wait anymore to wash your hands with warm water or step into a nice hot shower.

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What Is a Water Heater Recirculation Pump?

A water heater recirculation pump is a device that recirculates the water in your plumbing system to ensure faster delivery of hot water. These pumps work by pulling water from your water heater and pushing it through the supply lines into your home's fixtures.

After you close a faucet or turn off the shower and hot water starts to cool in the pipes, the recirculation pump pushes it back to the water heater for reheating. This is done via a dedicated water return line or your plumbing system's existing cold water lines.

Hot Water Recirculating Pump Types

The two main types of water recirculation pump systems are dedicated loop systems and integrated loop comfort systems.

Dedicated loop systems feature a separate return water line running between your water heater and plumbing fixtures.

Integrated loop comfort systems use your home's existing water lines for the return.

Some pump systems are designed to run constantly to ensure instant hot water at all times, while other models operate via a timer for improved energy efficiency. Smart sensor and thermostatic valve controls are also available to create an on-demand recirculating pump system.

What Are the Pros and Cons?

Installing a water heater recirculation pump offers both benefits and disadvantages. Here's a look at the pros and cons of a hot water recirculation system:

Pros

Faster hot water delivery. In most cases, recirculation pumps allow for almost instant hot water. When you install a pump system, the flow should reach your faucets within seconds and greatly reduce your hot water wait time.
Water conservation. Before hot water arrives at your sink, bathtub or shower faucet, gallons of cold water can disappear down the drain. A water heater recirculation pump can eliminate this waste and help lower your water bills.
Potential energy savings. Over time, your recirculation pump may help reduce your energy bills. While specific features can vary, some modern pump systems include insulation to help reduce heat loss and overall energy consumption. On-demand and controlled-usage recirculation pumps may also help lower your energy bills since they don't operate continuously.

Cons

Equipment and labor expense. While water heater recirculation pumps can help conserve energy, you may pay a lot for the pump and installation.
Increased water heater wear. Running your hot water recirculation pump constantly puts more wear and tear on your water heater, potentially shortening the appliance's lifespan.
Warmer cold water. If you use your existing water lines as the recirculation pump's return line, your cold water may run lukewarm at times.

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Could My Home Benefit From Installing a Water Heater Recirculating System?

If your home's plumbing setup causes long hot water wait times or you'd like to conserve water and potentially lower your energy bills, you may benefit by installing a recirculation pump. When constructing a new home, installing a water heater recirculation pump with on-demand controls can help meet the 2024 International Energy Conservation Code. These systems also work well in large homes with plumbing fixtures located far from the water heater, and they can help prevent cold water surges, also known as the cold water sandwich effect, that sometimes occur with tankless water heater systems.

It's important to consider costs and necessity before moving forward with a recirculating pump installation. If you're on a fixed budget or your hot water arrives within a short timeframe, adding a water heater recirculation pump may not be a worthwhile investment. However, if you deal with extended wait times for your water to run warm or you're concerned about cold water waste, installing a recirculating pump may provide added convenience, comfort and savings on your household utility bills.

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