Best Hot Water Recirculating Pumps Reviews To Buy in 2021

Most homeowners wonder why they have to wait for a few minutes for hot water, yet they have excellent water heating systems installed. This is a problem that people have been facing, and they still haven’t found a solution. Failure to solve this problem will always cost you a few extra hundred dollars because of wasting water.

Luckily, there is a permanent solution to your predicament. You just have to purchase the best hot water recirculating pumps, and you will be good to go. With a good recirculating pump installed on your water heater, you will always have hot water on demand.

Now that you know the best solution, which brand should you go for? Well, there are so many brands to choose from, but I have narrowed down the list to 9 picks. What’s more? I will walk you through all the things you need to know about hot water recirculating pumps.

Top 9 Best Hot Water Recirculating Pumps Reviews

In this section, I will get into the details of each hot water recirculating pump so that you have an easy time choosing the right one.


Watts Premier Instant Hot Water Recirculating Pump

The Watts Hot Water Recirculating Pump has proved to be the most reliable unit you can ever purchase. It has been around for so many years, and it has never ceased to impress. This pump has so many cool features, and most importantly, its performance is out of this world. Below are the attributes that I like about this pump.

Once you have this recirculating pump installed, you will always get hot water at the shower and faucets on demand. This means you will conserve almost 15,000 gallons of water annually. At least your water bill will reduce by 10%, which is immense. The good thing about Watts Recirculating pump is the fact that it costs less to operate. You won’t have to worry about high electricity costs.

The other cool thing about Watts is the fact that it comes with a timer. You can program the timer to activate the pump whenever you want. This hot water recirculating pump also comes with everything you need for set-up.  Besides, the installation process is pretty straightforward, and it should only take one hour at most.

Product highlights

  • Has a voltage of 120 volts
  • It s backed with a 1-year warranty
  • Built-in 24 hours programmable timer
  • Comes with installation hardware
  • Quiet operation


  • Can conserve up to 15,000 gallons of water annually
  • It does not consume a lot of energy
  • It does not require any kind of maintenance
  • It comes with everything that you need for set-up
  • It can be installed within an hour or so


  • Does not work with tankless water heaters
  • You might have to deal with 3 to 6 seconds of cold water

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Laing LHB08100092 AutoCirc Recirculation Pump

If you are looking for a recirculation pump that will always be at your beck and call to provide hot water, then you should consider buying the Laing LHB08100092. This pump has a unique design as compared to its competitors. Let’s see what makes this recirculation pump worth your money.

This system comes with a 24 hours programmable timer. You can set the timer to turn on the recirculating pump during the hours you are at home. This means you won’t have to leave the system running the entire day. With this programmable timer, you will never miss hot water when you wake up in the morning and when you get back from work.

As I mentioned earlier, this unit has a special design as compared to other recirculation pumps. For instance, the pump is meant to be installed under the sink of a faucet. Secondly, this unit does not require a return line. According to the manufacturer, you should install the Laing Pump furthest from the water heater.

This pump comes with a built-in temperature sensor that turns on the auto circ pump when there is a need to heat water. The sensor will then turn off the pump automatically when the water in the hot water supply line hits temperatures of 95 degrees Fahrenheit.

Product Highlights

  • Comes with a 6 ft long power cord
  • Has built-in 24 hours programmable timer
  • Requires 14 watts of power
  • Comes with a built-in temperature sensor


  • Should save an entire family 17,000 gallons of water yearly
  • Has a noise level of less than 30 DB
  • The timer allows you to set the operating periods
  • It is easy to install
  • Does not require a return line


  • Some users complain about the pump vibrating
  • You have to reset it if the power goes off

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Grundfos GRU-595916

The Grundfos GRU-595916 model is a great option for anyone who is looking for something similar to the Watts Premier Hot Water Recirculation Pump. Of course, this brand is a bit expensive, but you will get additional benefits for the extra cash. Let’s look at the reasons why you should purchase this recirculation pump.

With this model, you will have access to hot water almost instantly. In fact, it only takes a few seconds for you to get hot water flowing. At least you will be in a position to save a few thousand gallons of water annually. Just like most units we have reviewed, the Grundfos Comfort Series comes with a timer that allows you to set when you need the pump to turn on.

The other cool thing about Grundfos GRU-595916 is the fact that it uses a single-phase motor. This means that the unit will use less energy and runs quietly. Additionally, this recirculation pump does not require any kind of maintenance. Unlike other pumps, this model is suitable for circulating liquid in air-conditioning and cooling systems. You can also use it to distribute hot domestic water.

Product Highlights

  • Has a 115 single phase motor
  • Comes with a 10-foot power cord
  • Has a power consumption of 25 watts
  • Comes with a composite impeller
  • Has a comfort system included


  • It does not require any kind of maintenance
  • It has a two years warranty
  • Does not make noise when it is running
  • The impeller is made using a corrosion-resistant material
  • It is versatile and can be used in various applications


  • It is a bit expensive than most models
  • Users complain about bad threads

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KOLERFLO ¾” NPT Recirculating Water Pump for Portable Water System

If you are looking to purchase a pump that will circulate hot water into your bathroom and all the faucets, then KOLERFLO RS15-6 SS Green is a good option. It works perfectly to ensure that you won’t waste any water. Most homeowners might prefer to go for this particular model because of its low price tag. Below are other features that make KOLERFLO RS15-6 SS Green one of the best hot water recirculating pumps.

This pump is designed to be used in water recirculating and floor heating systems as well. With this pump, you will always have hot water available on demand. The good thing about this hot water recirculating pump is its adjustable power setting. You can select the wattage that is convenient for you from the three available power settings. Remember that the power setting you choose will determine the flow rate. The minimum flow rate is 20 liters per minute, while the maximum rate is 36 litres per minute.

KOLERFLO RS15-6 SS features a solid construction to ensure that it can last for years without the need for replacement. For instance, the pump housing is made using cast iron; the shaft is ceramic, the impeller is made using corrosion-resistant composite and the bearing is made using a carbon axial.

Product Highlights

  • Has three power settings (46, 67 and 93 watts)
  • It runs water at a pressure of 10bar
  • Has a flow rate of between 20 to 36 liters per minute
  • It is environmental friendly


  • It is designed to run silently
  • Reduces the wastage of cold water
  • Can be used in city buildings, air conditioning, suburban houses, boilers, and other applications as well
  • Installation is pretty straightforward
  • Comes with a corrosion-resistant impeller


  • Does not come with a detailed instruction manual
  • This pump is not self-priming

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Taco 006-B4 Bronze Circulator Pump

The taco 006-B4 Bronze Circulator Pump is rated as one of the most reliable and durable recirculating pumps you will ever get. Even by looking at it, you will notice that it features a top-quality construction. This pump is struck from cast iron, bronze, or flanged steel. It is for this reason why you might not need to purchase another unit in 10 years to come. Below are some of the attributes that customers like about the Taco 006-B4 Bronze.

This pump is affordable than most brands, but the funny thing is that it offers more value. For instance, this unit uses sweat valves to avoid the possibility of water leakage. Most pumps use threaded valves, and that’s why they tend to leak. The cool thing about Taco 006 is that you can choose between threaded, sweat, or union ¾ inch connections.

This system has a 9-foot head, which means gravity will not be a problem for your pump line. Besides, the motor is designed to adjust the flow rate depending on the scenario. The flow range can fall anywhere between 0 and 10 gallons per minute.

Product Highlights

  • Has a head range of between 0 to 9 feet
  • Has a flow range of between 0-10 GPM
  • Made using bronze
  • Has a compact design
  • Its maximum working pressure is 125 psi


  • This pump can serve you for more than 10 years
  • It rarely leaks because of its ¾ sweat connection
  • Does not make a lot of noise
  • It comes with a unique replaceable cartridge
  • Its power consumption is low


  • Does not come with a timer
  • The pump might run hot from time to time

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Grundfos 59896155 UP15-42F

I am pretty sure you guys can tell that Grundfos is good at making hot water recirculating pumps. This is the second model by Grundfos, and it has proved to be effective at ensuring that you get hot water anytime. The quality of this unit makes it stand out from its competitors. Let’s see what else makes it worth your money.

First and foremost, the build quality of this recirculating pump is impressive. With this pump, you don’t have to worry about replacing it anytime soon. I am saying this because it has been made using durable materials. For starters, it has a ceramic shaft, a cast iron housing, corrosion-resistant impeller, a stainless steel rotor, and carbon axial bearing. At least the pump is strong enough to serve you for more than 5 years.

The other cool feature of this pump is the fact that it comes with built-in motor protection. This means the motor will have a longer life and provide better performance as well. Moreover, the pump has been made in a way that it will operate silently. This recirculating pump is ideal for closed-loop heating applications.

Product Highlights

  • Has a 1/2 horsepower motor
  • Has a head range of 0 to 15 ft
  • Has a flow range of 0 to 17 gallons per minute
  • The maximum pressure is 145 psi


  • The pump has a cast iron housing which means it will last for years
  • Comes with a corrosion-resistant impeller
  • It has silent operation
  • Can be used in radiant heating, fan coil heating, hydronic heating, and other systems as well
  • Does not consume a lot of power


  • Might not work for under-sink installations
  • You will get warm water from the cold tap for a few seconds

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BOKYWOX Domestic Hot Water Circulator Pump

BOKYWOX is a great option for those who are looking for a domestic hot water circulator pump. Most of you might not have heard about this model because it is pretty new in the market. Fortunately, the few people who have tried it are praising the pump for its impeccable performance and awesome features as well. Below are a few attributes I like about this hot water recirculating pump.

As you would expect of any recent models, the BOKYWOX pump is super silent when running. The low noise allows you to enjoy life as the pump runs. It comes with a motor that is protected using an IP44 insulation class F. Moreover, the pump is designed to offer high efficiency without using a lot of energy.

Installing the BOKYWOX pump is quite easy because the package comes with an installation manual. Moreover, all the installation hardware that is needed is also included in the package. This pump is fitted with sensitive electronic sensors that facilitate the flow of water once you open the switch. When using this unit, you can choose between automatic and manual operation.

Product Highlights

  • Has a maximum working pressure of 10 bars
  • High-temperature resistance
  • The liquid temperature range is 0-212 degrees Fahrenheit
  • Comes with a single-phase motor
  • The motor is protected by a class IP44 Insulation class F


  • The pump is super quiet with less than 25 decibels of noise
  • It is made using cast iron which is durable
  • It is suitable for a wide range of applications
  • Does not consume a lot of energy
  • It is easy to install


  • The water might have a taste that disappears after a while
  • It does not have a warranty

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Laing 6050E7000 AutoCirc E10

If you are looking to spend money on a premium water pump, then the Laing AutoCirc E10 is the ideal option for you. This unit is more expensive than all hot water recirculating pumps. It is designed to be an under sink recirculation pump, but the good thing is that it is compatible with all tankless water heaters. This system might be expensive, but you will never complain about cold water. Let’s check out what this bad boy has to offer.

This pump has a low flow rate of 4 gallons per minute. However, this should not worry you because you will be using this unit with tankless water heater lines and potable water systems as well. The fact that it is an under sink recirculation pump, and it has a low flow rate, there is no need for a head range.

Installing this unit might be a bit challenging, but some homeowners can fit it within an hour or so. You should get this pump installed by a professional in order to avoid any mistakes. As you would expect with any premium recirculating pump, the E10 model comes with a built-in timer that allows you to set the hours you need the pump to be operational.

Product Highlights

  • Has a 4 GPM flow rate
  • Requires professional installation
  • Does not have a head range
  • Comes with built-in temperature control
  • Includes a 6-foot power cord


  • It is equipped with an energy-efficient motor
  • This pump is extremely durable
  • It is backed with a one year warranty
  • It Is compatible with all tankless water heater systems
  • Does not require any recirculation pipe


  • It is expensive than other brands
  • Has a very low flow rate

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Grundfos 99452459 New 2019 Model

Our last pick happens to be one of the latest models by Grundfos. As you can see, Grundfos is a famous brand in the market, and you can never go wrong with their hot water recirculating pumps. This model is a bit new in the market, and it is meant to replace the Grundfos 595916. Despite being new in the market, plumbers are already praising this model for its reliability. Here are some features you might like about the New 2019 Model.

As you would expect with most Grundfos products, this pump features a durable construction design. The pump comes with a stainless steel rotor cladding and a corrosion-resistant impeller. At least you can count on this pump to serve you for several years.

Additionally, the New 2019 model comes with a 24-hour programmable timer. You can set when you want hot water to be available and when the pump should turn off. This way, you will be in a position to save energy. The other nice feature about this pump is the fact that the motor is whisper quiet and does not require any maintenance.

Product Highlights

  • Comes with a low-watt two-pole motor
  • Has a 24-hour programmable timer
  • It is whisper-quiet
  • Comes with a hose kit and thermal bypass valve


  • It has a battery back up that comes in handy when you lose power
  • Saves up to 12,000 gallons of water annually
  • Does not consume a lot of energy
  • Does not require a return line
  • It features a durable construction


  • It is not compatible with all water heating systems
  • Installation can take up to two hours

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What Is A Hot Water Recirculating Pump?

A hot water recirculating pump is one of the most sought after home improvement tools in the market. This system is meant to ensure that you always have hot water ready instead of waiting for a few minutes for hot water to reach your faucet or shower. As you well know, even the best water heating systems will not do an excellent job in terms of providing hot water on demand. A hot water recirculating pump is designed to keep the water in your supply line flowing back into the water heater system so that it can be reheated.

A hot water recirculating pump can be installed next to a water heater or under the sink. This unit comes with a 24-hour timer that allows you to determine when the pump should start functioning. With a good system, you will never have to let cold water run until it gets hot. At least the pump will help you save a few thousand gallons of water yearly.


How Does A Hot Water Recirculating Pump Work?

Well, the manner in which a recirculating pump works depends on the type. As you well know, the most common installation is under the sink and above the water heater. For the pump to work, there must be a sensor valve installed under the farthest sink from the water valve. Some of the hot water recirculators come with built-in sensor valves, and this means you can install it under the sink.

The sensor valve comes with a thermostatic valve, which is responsible for detecting the water temperatures so that it can open or shut a valve. Remember that a hot water recirculating pump relies on the sensor valve to operate.  In case the water in the pipe drops to 85 degrees Fahrenheit, the sensor valve will open to allow hot water to start running.  Once the water in the hot water line turns cold or lukewarm, it will be pushed back to the water heater via the cold water supply line.

The sensor valve is designed to close and turn the hot water pump off when the temperatures reach 95 degrees Fahrenheit.

Some hot water recirculating pump systems come with a dedicated return water line back to the water heater. Such systems do not use the cold water line as a return because they come with a separate return line. This line should connect at the bottom of the water heater.


Types Of Hot Water Recirculating Pumps

Before you decide on which hot water recirculating pump is right for you, it is important that you familiarize yourself with the different types of hot water recirculating pumps that are available. In this section, I will discuss the two common types you can use.

  • Full Recirculating Pump System

If you choose to go with this option, you will have to install an additional pipe in your home’s plumbing. This pipe is specifically designated for hot water, and it should be attached to the pump. You have to ensure that the pump you are about to buy is compatible with this kind of system.

A full recirculating pump system works by creating a loop from the water heater system to the faucet and back.  The recirculating pump draws back hot water through this loop so that you access hot water immediately you turn the hot water faucets. With this system, no water will be left in the pipes to get cold. This type of water recirculating pump system should not increase your energy costs because the sensor will shut the pump off after it makes a complete loop.

  • Recirculating Pump Comfort System 

If you are looking for a cost-effective solution, then a recirculating pump comfort system is your best bet. You don’t have to incur the extra cost of installing an additional pipe when using the recirculating pump comfort system. Unlike the first type that relies on a dedicated line, this system utilizes the existing cold water pipe to draw back lukewarm or cold water to the water heater. Although this option is effective when it comes to reducing the time it takes for hot water to start flowing, it has one shortcoming. You will notice that the water that flows from the cold faucet takes time to get cooler because the hot and cold water flows the same supply line.



In case you are wondering whether a hot water recirculating system is worth your money, below are some benefits that come with using this system.

  • Immediate access to hot water

The main reason we install a hot water recirculating system is to reduce the time we wait for hot water to flow from the faucet. As long as you have one of the best hot water recirculating pumps, you will no longer have to stand at the sink, waiting for warm water to clean dishes. You will always have access to hot water on demand.

  • Water conservation

The amount of water we waste every day can be reduced significantly by installing a hot water pump. Most households have to wait a few minutes for the cold water to drain before accessing hot water. With a good pump, you can save more than 10,000 gallons of water per year. At least you will cut the cost of water bills by a few hundred bucks per year.

  • Easy To Install

The good thing about using hot water recirculating systems is that they are easy to install. You do not have to incur the cost of hiring a plumber to fix the pump correctly. Besides, most manufacturers will include a manual that should guide you on how to go about it.

  • Wide Applications

Another advantage of hot water recirculating pumps is the fact that it can be used in commercial, residential, and industrial plans.



Although these systems come with so many advantages, there are also some disadvantages as well. Below are a few cons you should know.

  • Noise

One of the few problems you might encounter when using some pumps is noise. Of course, not all units are noisy, but some tend to produce loud sounds when they become old.

  • Cold water delays

When you install a hot water recirculating pump, you will have to sacrifice access to cold water for a few seconds of minutes.

  • Sensor Valve Costs

Although hot water recirculating pumps can last for more than ten years, you still have to replace the sensor valve every one or two years.


Things To Consider When Buying A Hot Water Recirculating Pump

With all the brands that are available out there, you should use due diligence when choosing a hot water recirculating pump. Besides, you have to understand the factors that make a good pump. Make sure you take the following factors into account when you hit shopping.

  • Pump Housing Material

The material that is used to make the pump housing is so important because it determines the durability. Cast Iron and bronze are well known for durability, but at the same time, cast iron might not be ideal for potable water use because it causes rust within the recirculating system. Aluminum is the best material if you are looking to run potable water through the pump.

  • Timer

A programmable timer is one of the features you should look for before purchasing a pump. Remember that a timer allows you to schedule when you want the pump to turn on and shut off. In simpler terms, the pump will only run during peak usage times. In case you choose to go with a pump that does not have a built-in timer, you can purchase a timer separately and get it fitted.

  • Type of Water Heater System 

Before you add any recirculating pump into your shopping cart, you should know the type of water heater installed in your home. Some pumps are not compatible with tankless water heaters because they do not have enough power. Most pumps can work well with traditional water heaters, but things are different when it comes to electric and gas tankless water heaters.

  • Flow Rate

The other most important factor is the flow rate which is measured in gallons per minute. This is simply the amount of water that travels through the pipe in a given minute. If you want to enjoy a refreshing shower, then go for a pump that has a high GPM. On the other hand, a recirculating pump with a low GPM should do, especially if you want a slow running faucet. Luckily, some models have adjustable flow rates, which means you won’t have to sacrifice anything.

  • Noise

Nobody wants to have a noisy pump installed in their home. A pump is meant to enhance your comfort and not disturb your peace in the name of making hot water available on demand. Go for a pump that has a whisper-quiet operation.

  • Warranty

The other factor you might want to consider is the warranty. As you well know, the best hot water recirculating pump should be backed by a generous warranty period. Two or three years warranty should be enough. Avoid purchasing products that do not have any warranties as it suggests that the manufacturers lack confidence in their products.


How To Install a Hot Water Recirculating Pump

When Installing an Instant Hot Water Recirculating Pump, here are the steps you need to follow;

  • Turn off the gas valve and the water heater breaker

Turn off the water heater and the gas valve to the water heater. If the water heater is electric, you don’t have to turn it off. There is a yellow or red gas valve close to the water heater; you should follow the gas coming out of the water heater. To shut off the gas, turn the valve in a perpendicular direction. In case you are using an older water heater with a pilot light, ensure the pilot has been distinguished.

  • Shut off the water to the water heater

The easiest way to do this is directly above the water heater, where you turn the valve into a perpendicular position. In case you can’t find the water heater, just turn off the water on the main water valve.

  • Drain the hot water from the fixtures

After you shut off the water supply, drain all the hot water from every pipe in your house. The best way to do this is by locating the lowest fixture and opening the hot water to drain. Ensure everything has been drained to the last drop.

  • Drain all the water from the water heater

After draining the hot water from the pipes, ensure to drain the water heater. At the bottom of the water heaters, there are drain valves where you connect a hosepipe to the spigot. Use a flat head screwdriver to open the water valve. After draining the water, close the valve using the same flat head screwdriver.

  • Remove the hot water pipe from the heater

When the pipes are dry, remove the hot water pipe from the water heater. Mostly this pipe is a braided flex pipe. To easily remove it, use a wrench to loosen the nut and remove the pipe. In case you have PEX, CPVC or copper, it is important to get a competent plumber.

  • Connect the recirculating pump to the threaded needle

Once the water hot water piping discharge has been removed, install the instant hot water recirculating pump to the hot water outlet nipple that’s been threaded. Ensure the pump is installed correctly by ensuring the arrow on the housing points to the direction of the flow of water. Teflon plumbing tape is not needed in the event the female threaded nipple has a rubber gasket.

  • Connect the hot water supply line to the recirculating pump

Once you have installed the recirculating pump to the heater, connect the hot water line to the outlet nipples water pump. All you have to do is tighten the nut using a wrench.

  • Turn the water back on

After the water heater is full, use a plumbing fixture until all the air has come out of the home’s piping system.

  • Get the farthest sink from the circulation pump

To install the sensor valve, you need to locate the sink that’s farthest from the instant circulation pump. If that’s not possible, get the sink where the hot water takes the longest to arrive.

  • Shut off sink water valves

To shut off water to the sink, you will need to have two valves; one for hot water and one for the cold one. To turn them off, turn the stop valves under your sink perpendicularly.

  • Remove and connect the flex lines 

Remove and connect the flex lines to the sensor valve then program the times you want the pump to be running. This timer allows you to set the pump in such a way that it’ll start heating the water right before you need to use it.


Frequently Asked Questions

Below are some of the common questions that people ask about hot water recirculating pumps.

  • Is a hot water recirculating pump necessary?

Well, as you have read in the pros and cons section, these water systems have more benefits as compared to the disadvantages. In simple terms, a hot water recirculating pump is necessary if it takes more than 30 seconds for the water running down your shower or faucet to get hot. The pump will help you save more than 5000 gallons of water per year.

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

It all depends on the type of hot water circulator pump you have and whether you are a DIY type of a person. Most of the units I have reviewed are relatively easy to install, and it should take you less than an hour to complete the installation. You will also find some models that must be installed by a professional plumber.

  • Does a recirculating pump use a lot of electricity?

It depends on the model you have installed. However, you can minimize the amount of electricity it uses by placing it on a timer. You should not allow the pump to run for 24 hours, even when no one is at home.


We’ve come to the end of our guide, and I am pretty sure you have learned a lot about hot water recirculating pumps. These units have proved to be so effective in terms of water conservation and reducing the time it takes for water to get hot. The good thing with these pumps is that it can be placed on a smart outlet, thus giving you more control over your recirculating pump.

Now that you have a list of the best hot water recirculating pumps, it will be easy for you to choose a unit that suits your needs. You can count on any of these pumps that I have reviewed to do an excellent job in your home.

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