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Best Hot Water Circulation Pump For 2022

Brandon Forder
  Nov 28, 2022 4:57 AM

We all enjoy a steaming hot shower, but it usually takes approximately 30 seconds from the time we turn on the water until it gets hot. The longer we have to wait, the more cold water we will squander. If you and your family take showers many times a day, you could be wasting hundreds of gallons of water every year. With a hot water recirculating pump, not only do you have fast access to hot water, but you also save gallons of water each year and money on your utility costs.

Installation of this device is predicted to result in water savings of over 10,000 gallons per year. There are literally hundreds of different models of hot water recirculating pumps available, making it difficult for many individuals to select the most appropriate one. And that's where we come in, with our in-depth buying guide on finding a quality pump. We discuss the importance of flow rate and noise level, as well as why a maintenance-free pump is necessary.

In addition, we have included in-depth assessments of the best hot water recirculating pumps on the market, after researching various models extensively via manufacturer websites and consumer reviews. Let's cut to the chase and get down to business.

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Last update on 2022-11-28 / Affiliate links / Images, Product Titles, and Product Highlights from Amazon Product Advertising API

Buying Guide


Temperature activated

This variety keeps tabs on the piping water temperature and adjusts itself as needed. For example, if the temperature drops below 80 degrees Fahrenheit, the pump will start working. However, in order to save power if the temperature climbs above, say, 100 degrees Fahrenheit, it will automatically turn off.

Time activated

This pump can be set to turn on and off at specific times. We recommend scheduling its use for peak times, like when everyone is taking a shower in the morning or before bed. The rest of the day is yours to relax without interruption.

On-demand pump

This one keeps the water hot whenever you need it because it is always on. It's the least expensive option, but if you want to save money over time, choosing of the other two makes more sense.

Flow rate

The rate at which water flows through the pipes is expressed in gallons per minute (GPM). As a result of the flow rate, the water pressure at the tap can be adjusted. The difference between a weak, unrefreshing shower and a fast-moving, revitalizing one is the water's flow rate. We greatly appreciate the former at any time. The flow rate of devices like the Kolerflo RS15-6 SS may be changed, so you can choose between low and high pressure.

Connection type

The connecting system is crucial since it specifies how the pump must be attached. In general, pumps with 3/4-inch flanges are compatible with other diameters. Every model comes with a list of compatible connections, so all you have to do is pick the one that works for you.


The water recirculation pump has a built-in timer that allows you to switch it off at any moment. Accordingly, a timer is useful equipment to have. However, a timer can be readily installed in a water circulation pump if one is not already included.

Durability and Construction

Eventually, water-based systems fail in every application. The longevity of a pump can be increased by using high-quality materials and constructing it well. For this reason, premium stainless steel should be your target material. Such systems can last for a very long time and are highly sturdy.

The typical lifespan of a pump is between three and five years. However, stainless-steel recirculation pumps can be expected to serve for at least a decade.

If you want to keep your hot water recirculating pump running smoothly for a long time, it's a good idea to install a whole-house water filter to get rid of any silt, sediment, or other contaminants that could impede its performance.

Housing Material

The water pump's functionality is just as important as the materials' longevity. For example, if your water recirculation pump is built of iron, you won't be able to take it with you very far. The main reason for this is the rust that iron causes within the system. As a result, an aluminum pump is the best option if you require a pump for drinking water.


These days, priming is unnecessary for the vast majority of hot water recirculating pumps. There can even be a little bit of air in the lines and it won't affect their ability to work. However, there are some pumps that require priming before they may be used. Pumps that must be submerged in order to function, such as those found in wells, cannot operate if air is present in the supply lines.

Temperature adjustment

Although some of us would want steaming hot water, others would settle with lukewarm. Therefore, select a pump that can deliver hot or cold water depending on your needs. With a temperature range of 40° F to 180° F, the Watts 500800 is an excellent option.


What Is A Hot Water Recirculating Pump?

Above the water heater, on the hot water line, is where you'll find a little pump making up an instant hot water recirculating system. You can enjoy instantaneous hot water at any faucet in the house thanks to the hot water pump, which circulates heated water through the hot water line.

It takes anything from one minute to several minutes for the water in a sink or shower to get hot, which is a common complaint among new homeowners. In a matter of seconds, rather than minutes, a hot water recirculating pump can cut down on the waiting time. In most cases, the water will start out warm rather than frigid and get hot within 10 seconds.

Odessa has instituted a rebate program to encourage the installation of recirculation pump systems in households since instant hot water systems can be so successful at providing hot water and decreasing water waste.

How Does A Recirculating Pump Work?

A modest electric pump is used by a hot water recirculation pump to keep the plumbing system's hot water hot. When the water temperature rises above the set point, the pump will redirect the water back to the water heater via the cold water line.

Under the farthest sink in the house (from the water heater), a sensor valve will automatically close and open as needed by the hot water recirculating pump.

This valve will close automatically if the water temperature rises over about 90 degrees. The valve will open and the recirculating pump will start working if the temperature dips below the predetermined point (sending the lukewarm water back to the water heater through the cold water line).

Some models of hot water circulating pumps have built-in timers, or you can install a separate timer, so that the pump only runs during predetermined hours. Depending on a number of conditions, your water or electricity cost could skyrocket if you don't set a timer.

One study of Palo Alto homes found that each fixture might save between 900 and 3000 gallons of water per year by installing a hot water recirculating pump. This can result in an annual save of 21,000 gallons of water for a home with seven faucets.

Do I need a professional to install a hot water circulator?

If you have no experience fixing things around the house or working on water lines, or if you just don't like doing it yourself, you should call a plumber. Further, in some jurisdictions, only licensed professionals are allowed to work on municipal water systems.

Can hot water recirculating pump be used with a tankless water heater?

No, that can't happen. Hot water is produced on demand by a tankless water heater, thus there is no need for a reserve supply. Therefore, there will be no water for a hot water recirculating pump to heat and transport.


If you want to have hot water whenever you need it, installing a hot water recirculating system is a smart choice. Get a model that meets your needs in terms of flow rate, pressure, and temperature range, though.

We wish you a pleasant experience while perusing this manual.

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