6 Excellent Hot Water Recirculating Pumps to Get Warm Water without Delay

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Last updatedLast updated: December 08, 2021
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We lose thousands of gallons of water annually in the 2 minutes of waiting for the shower water to turn hot. If you have a huge house then you are probably looking at a 5-minute wait, every day. Luckily, hot water recirculating pumps can help you save time and money. That said, there is a wide variety of these hot water recirculating pumps that makes it difficult to find the perfect one. But we are here to assist you.

We tried out 36 products to ensure we find the best hot water recirculating pump. After weeks of trying out each of these products, we noted the good-quality recirculating pumps. We were particularly impressed by the Watts Premier 500800, our editor’s choice. Easy installation even for novices, high-quality material, affordability, and other extra features are some of the reasons we love it. Our review also highlights other impressive hot water recirculating pumps.

In the review, we looked at different features and how important they are. Some of these features include the outlet size, temperature range, warranty, pressure, water flow and even the length of power cords. To ensure you get the most out of this review, we use a simple structure. The review starts with a comparison table that outlines all reviewed products. This is followed by in-detail reviews of each product and a buying guide to help you make an informed decision. Lastly, there is a FAQ section and we also give our verdict.

Top 6 Hot Water Recirculating Pumps Review 2022


Watts Premier 500800Editor’s Choice

  • Pressure: not specified
  • Outlet: ¾’’
  • Warranty: limited one year
  • Power cord: 10’
  • Temperature range: 40-180°F

More features: programmable 24-hour timer, installation kit included, 8.5 lb weight

After various consultations with industry professionals, we couldn’t wait to get our hands on the Watts Premier 500800. It is a popular pump because of the extra features it has and its affordable pricing. With this recirculating pump, you can save about 15,000 gallons of water every year. At least that’s what the brand promises. Watts, however, manufactures quality plumbing supplies and this is no exception.

One of the main things that we loved about this recirculating pump is the ease of installation. Experienced users can take as little as one hour to install this pump while new users may need some more time. You also need little to no extra piping. All you have to do is place it on top of the water heater with the ¾-inch outlets and install the sensor valve at the farthest faucet from the heater.

The 24-hour timer will also come in handy. You can program it to work when you use hot water the most such as mornings or evenings. This may seem like a trivial feature but it is necessary if you want to save energy and even money.

A lot of accessories are included with the Watts Premier 500800. These include a programmable timer, sensor valve, mounting screws for the valve, and a 10-foot electric cord. It also comes with 12-inch supply lines (2) and some rubber washers.

What makes it stand out?

  • Easy installation
  • Free maintenance offered
  • Affordable
  • All the necessary accessories included
  • Runs silently

Which disadvantages must you keep in mind?

  • Slightly warms the water
  • You can’t use it with tankless water heaters

Grundfos GRU-595916Premium Choice

  • Pressure: 145 psi
  • Outlet: ¾’’
  • Warranty: limited two year
  • Power cord: 6’
  • Temperature range: 36-150°F
  • Water flow: 6.3 GPM

More features: corrosion resistant impeller, 0-72’’ head range, 1/25 hp motor, composite impeller

Grundfos is known to make some of the most durable and high-quality hot water pumps in the industry. The Grundfos GRU-595916 is made from stainless steel and bronze parts unlike other products on the market. It not only offers great performance but also has some impressive features.

The pump, for example, has a flexible flow range. With this feature, you can simply adjust the flow of water depending on the task at hand. It can deliver a maximum of 6.3 gallons per minute, which is quite efficient. Furthermore, the Grundfos GRU-595916 can also self-adjust its water pressure depending on your use. This pump will lower the energy costs of your home and save water too.

While there are many cheap recirculating pumps, they often have a lot of maintenance needs and costs. This model is a bit pricier than most pumps but it needs little to no maintenance. You will only need to check up on it a few times a year but this does not mean that it will compromise on performance.

The hot water pump has a built-in timer to help you set the times that you need it on. Other extra features that we loved include its corrosion-resistant impeller, a 6-foot power cord, 0 to 72-inch head range and a composite impeller.

One of the challenges you are likely to face with this recirculating pump is that it’s a bit noisy than conventional pumps.

Why did it make our list?

  • No addition wring required
  • Easy installation
  • A timer included

What is not ideal about it?

  • Can get a bit noisy

BOKYWOX RS15/6GBest Value

  • Pressure: 11 bar
  • Outlet: ¾’’
  • Warranty: limited one year
  • Power cord: 4.1’
  • Temperature range: 0-212°F
  • Water flow: 9.5 GPM

More features: corrosion resistant, composite impeller, cast iron and ceramic body

The BOKYWOX RS15/6G is an affordable recirculating pump that does not compromise on quality. If you are on a budget but would still love a good quality recirculating pump you should try this out. It is highly efficient yet has low consumption. The pump is also easy to install and maintenance-free, which saves you some plumbing costs.

We loved how versatile and easy to use this hot water recirculating pump is. Not only can you use it to keep your shower water warm but you can also install it directly in drinking water pipes. After you use it a couple of times, the taste of oil/impurities in your drinking water will disappear. It can also serve in commercial or industrial applications.

With the BOKYWOX RS15/6G, you get a three-speed flow control including 20, 29 and 36 liters per minute. It also comes with an adjustable power setting that lets you chose either of three ratings. These include 46, 67 or 93 watts. You can control your energy bills with this recirculating pump.

The pump housing of the BOKYWOX RS15/6G is made from cast iron while the impeller is made from corrosion-resistant composite. Its shaft, on the other hand, is made from ceramic while the bearing is made with carbon axial.

Other impressive features of the BOKYWOX RS15/6G include super silent, environment-friendliness, high flow, and no leakage.

Why did it make our list?

  • No leakage
  • Super silent
  • Resists hot water temperatures of up to 212F

What is not ideal about it?

  • It has a short power cord
  • Pressure: 145 psi
  • Outlet: ¾’’
  • Warranty: not specified
  • Power cord: not specified
  • Temperature range: 0-212°F
  • Water flow: 7.9 GPM

More features: ceramic shaft, copper motor wire, aluminum exterior

The Trupow Hot Water Automatic Circulation Pump is an awesome pump that you can use for both domestic and commercial purposes. It works best for houses, city buildings, villas, and even industrial projects. There are several reasons to buy this automatic circulation pump.

One of the first things you will notice about the Trupow pump is how compact it is. At only 5 pounds and measuring 7.3 by 5.7 by 5.1 inches, this pump is quite portable and can be easily stored.

Its pump housing is made from aluminum, which explains its light weight. The impeller is made from plastic while the motor wires are copper wires. Like most recirculating pumps, Trupow’s shaft is made from ceramic.

While the Trupow does not have the highest water flow rate at about 30 liters per minute, it can deliver sufficient flow for your needs. This is because it delivers a standard pressure of 145 psi. We also loved that the pressure remains consistent when the pump is on.

It is very easy to install the Trupow Hot Water Automatic Circulation Pump. It comes with an instruction manual that will help you make the installation without further hassles.

A three-speed setting allows you to control the volume of water. The lowest volume of water is denoted as 1 while the highest volume of water is setting number 3.

What are its best features?

  • Excellent for both commercial and residential use
  • Budget-friendly
  • It is lightweight

What could be improved?

  • It may start producing noises when air enters the pipes

KOLERFLO RS15-6 SSMost Durable

  • Pressure: 145 psi
  • Outlet: ¾’’
  • Warranty: not specified
  • Power cord: 4.1’
  • Temperature range: 0-212°F
  • Water flow: 9.5 GPM

More features: stainless steel body, corrosion repellent

The KOLERFLO RS15-6 SS is the perfect water heater for those with floor heating and water recirculating systems. The versatility and options that this pump gives will ensure you can tailor it to your needs. We enjoyed using this pump as it will make hot water available before you think about it.

The nice and colorful design is one of the first things that you notice about this recirculating pump. Unlike other pumps that put little thought to design, the KOLERFLO RS15-6 SS comes in an elegant teal color. Furthermore, the body is made from stainless steel meaning you can rely on it for a couple of years. Its impeller is also corrosion repellent to reduce any chances of rust. The pump’s shaft is made from ceramic and it also has carbon axial bearings.

To make it energy efficient, the manufacturing company included an adjustable power setting. You can easily choose from 46, 67 and even 93 watts with each of these power ratings denoted as 1,2,3 respectively. This makes it easier to adjust the settings. You may also tweak the flow rate settings to get a low of 20 liters per minute and a high of 36 liters per minute.

A step by step instruction manual with diagrams is included to make installation easier. And it does.

Why are we impressed?

  • Little noise
  • Easy installation
  • Various power ratings to choose from
  • Durable

What negatives must you be aware of?

  • Other users report it may not be suitable for solar hot water systems

Happybuy RS15-6Highest Efficiency

  • Pressure: 145 psi
  • Outlet: ¾’’
  • Warranty: limited one year
  • Power cord: not specified
  • Temperature range: 0-212°F
  • Water flow: 9.5 GPM

More features: composite impeller, corrosion resistant, aluminum pump, triple speed control

The Happybuy RS15-6 is a powerful yet affordable hot water recirculating pump. It has some great features that may be difficult to get at its price range. What can you expect of this circulating pump?

First, the Happybuy RS15-6 has the standard ¾ inch outlets that allow you to use conventional pipes. You will not have to get any extra material. Like the KOLERFLO RS15-6 SS, this pump also has an adjustable power setting that allows you to choose the  46, 67 or 93 watts. It also has a three-speed control, which makes it possible to control the flow of water. You can choose between 20, 29 and 36 minutes per liter.

Another impressive feature of the Happybuy RS15-6 is that it is manufactured from some durable material. Its pump housing is made of aluminum, which means it is light and rust-proof. The impeller, on the other hand, is made from corrosion-resistant composite.

Get this recirculating pump if you want convenience.for example, the easy installation is one reason why this is an attractive pump. We all know how costly hiring a plumber can get. With the Happybuy RS15-6, all you need is a wrench to get the pump connected to the pipeline. After this quick fix, the 3-minute wait in the shower turns to a 15-second delay.

This pump is environment-friendly and it saves energy, which reduces your utility bills. It is also super silent.

Why did it make our list?

  • Offers 3-speed control settings
  • Efficient with low energy consumption
  • A 1-hour installation

What is not ideal about it?

  • The flange face is thin and may cause leakages

Things to Consider

Before whipping out your credit card to get one of the top recirculating pumps on the market, it is best to understand if it is ideal for you. This is why you ought to consider some of the essential features of recirculating pumps. This buying guide will review some of these features to help you find the perfect hot water recirculating pump for your home or business.

Why use a hot water recirculating pump?

Simply put, a hot water recirculating pump is a pump or a system that allows you to get hot water when and where you want it. Think of it as hot water on demand. We all hate that wait between switching on our shower faucets and the water turning hot. Here are a couple of reasons why you ought to get a recirculating pump.

    • One of the main reasons for purchasing this pump is to get water on demand. Some recirculating pumps even have timers that you can set to warm water even before you wake up.
    • Aside from pleasure and convenience, these pumps help you save money from thousands in water bills as you no longer have to waste cold water while waiting for hot one to start
    • They help the environment
    • How to install a hot water recirculating pump

      Most recirculating pumps can easily be installed, even with inexperienced users. They often have instruction manuals that you can easily follow to install your pump. Some pumps just need a wrench to install while others may need advance tools or even a professional plumber. These are some steps to take to install your hot water recirculating pump.

      • First, you should shut off the water running in the cold-water pipe to ensure no flow of water. Cut off the house’s main supply if you are unsuccessful
      • Disconnect the hot water supply line but keep a rag close in case any hot water spurts out.
      • Install the pump on the hot water supply line but ensure the timer of the recirculating pump is accessible.
      • Reconnect the hot water supply line with the water heater. Ensure it is well-tightened.
      • Look for the farthest faucet in your home where you will install a check or sensor valve.
      • To connect the sensor valve, shut off the supply tubes of the faucet. Both hot and cold water supply tubes.
      • Screw the supply tubes from the faucet to the two outlets on top of the sensor valve. Be sure to place the hot water line on the left and the cold-water line on the right. You can then mount the sensor valve on a wall.
      • Turn back the water to reach both the shower and the sink faucet. Let the water run for a while to remove any air in the pipes.
      • Lastly, use the timer to set up the recirculating pump.

      Price range

      Pricing is important when you are looking to buy any home appliance. However, this all depends on your budget and how you intend to use the device. If you want to use your recirculating pump in a residential premise you do not need to spend hundreds on a recirculating pump. You may choose to go with an affordable yet high-performing pump such as the BOKYWOX RS15/6G.

      If you are a commercial enterprise, on the other hand, and constantly need hot water, you may have to spend a couple more bucks. This also applies to those with larger homes that may need higher pressure or volumes of water.

      You can find the best hot water recirculating pump by the following features

      6 Excellent Hot Water Recirculating Pumps to Get Warm Water without Delay

      To find the perfect hot water recirculating pump that suits your needs, you ought to consider some important features. These include:

      Water recirculation system type

      There are two main types of recirculation systems with each of them presenting different advantages. These are the two types of recirculation pumps.

      • Full recirculating pump system- Under this system, an additional pipe solely designated for hot water is added into your home. This is then connected to the pump. When you turn the hot water faucets, you are greeted with only hot water since the pump creates a loop from the heater to the faucets.
      • Recirculating pump comfort system- This one does not install a second pipe but uses the cold-water pipe to send any remaining water to the heater. This is more cost-effective and works best if your water supply is far from the shower or kitchen.

      Motor power

      The motor power that you choose determines the experience that you have with your pump. Some pumps such as the Grundfos GRU-595916 has a single motor phase while others like the Happybuy RS15-6 have a three-speed motor. A three-speed motor allows you to choose a low, medium or high rate of flow. It is, however, worth noting that a high rate may consume more power.

      Connection compatibility

      6 Excellent Hot Water Recirculating Pumps to Get Warm Water without Delay

      Before purchasing a recirculating pump, you must determine whether it can connect to your pipes. These hot water recirculating pumps have different outlets sizes. All the pumps we reviewed such as the Watts Premier 500800 and the KOLERFLO RS15-6 SS include the standard ¾ inch outlets. While some may purport to offer a ¾-inch outlet, some may be smaller than advertised so you need to be on the lookout.

      Temperature range

      You need a recirculating pump that can withstand the high-water temperatures without the need for a cooling pipe or system. The higher the temperature range, the better.

      The Grundfos GRU-595916 had the lowest temperature range at 36-150°F. Several pumps including the BOKYWOX RS15/6G and the Trupow Hot Water Automatic Circulation Pump had some impressive temperature range. The range for these two pumps is 0-220°F.

      Flow rate

      The rate of flow will ultimately depend on your usage. Do you want more volumes of water? Adjust the flow rate. The Grundfos GRU-595916 stood out in this regard as it allows you to control the flow rate. It also has a self-adjust mechanism that regulates water flow on its own, depending on your usage of course.

      Pump quality

      Pump quality is affected by various things including the pump housing and other materials used to make the pump. An aluminum body is preferred for its lightweight and rust-proof qualities. The Trupow recirculating pump is an example of an aluminum pump housing. Another type of pump housing is the use of cast iron such as in BOKYWOX RS15/6G. This material is often heavier and susceptible to rust. You ought to also look for a pump whose impeller is made from corrosion-resistant composite. Ceramic shafts and carbon axial bearings are also popular among high-quality pumps.


      A warranty gives the buyer confidence that the product they are buying is of decent quality. Ideally, you want a product with a longer warranty time. The Grundfos GRU-595916 stands out with a limited two-year warranty. Watts Premier 500800 comes with a limited one-year warranty.

      Noise level

      6 Excellent Hot Water Recirculating Pumps to Get Warm Water without Delay

      A noisy pump is quite irritating. Some pumps are so loud that you can hear them from as far as the attic. In most cases, it might be air getting into the pumps. That said, this does not mean that there are no loud recirculating pumps. The BOKYWOX RS15/6G is one of the super silent pumps we reviewed.

      Installation easiness

      Installation shouldn’t be a difficult process. Some recirculating pumps such as the Trupow Circulation Pump come with instruction manuals, which may simplify this process. The Happybuy RS15-6 is one of the easy to install recirculating pumps we explored.


Recirculating pumps may last 3 to 5 years depending on the pump housing material. Other pumps have lasted for more than 10 years because of being made with good-quality materials

Recirculating pumps save about 15,000 gallons of water annually, but the money you save depends on how much you pay per gallon. In any case, you will still lose hundreds of dollars in water bills if you do not get a hot water recirculating pump.

Our Verdict

While every product stands out in one way or another, we had to pick our top three. In first place is the Watts Premier 500800, our editor’s choice. This simple recirculating pump has a stylish design, works exceptionally well and is easy to use It is also affordable, easy to install and offers several extra features.

The Grundfos GRU-595916 was our second choice for the best hot water recirculating pump, and for obvious reasons. The pump is made from high-quality material that ensures you shall use it for years to come. This Grundfos pump not only delivers efficient performance every time but also offers other extra features.

If you are on a budget but would still fancy a powerful pump then you should get the BOKYWOX RS15/6G, our best value pick. It is easy to use, maintenance free and is quite versatile.

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