Unlocking Efficiency: The Tankless Water Heater Recirculation Pump Explained

Are you tired of waiting for hot water to reach your faucet or shower? Do you want to minimize water wastage and save on your energy bills ? If so, you may be interested in learning about the benefits of installing a tankless water heater recirculation pump for your tankless water heater.

In this article, we will explain the mechanics of a tankless water heater and how a tankless water heater recirculation pump can enhance its performance. We will also discuss the different types of tankless water heater recirculation pumps available and provide step-by-step instructions on how to install them. Whether you’re a homeowner or a business owner, understanding the importance of a tankless water heater recirculation pump for your tankless water heater can improve your daily life and contribute to a more sustainable future.

So, let’s dive in and explore this fascinating topic!

In three sentences: The essentials in a nutshell

  • A recirculation pump is necessary for tankless water heaters to ensure quick access to hot water and prevent water wastage.
  • Having a recirculation pump in your tankless water heater offers benefits such as cost savings and prevention of water wastage.
  • There are two types of recirculation pumps for tankless water heaters: full recirculation pump systems and recirculation pump comfort systems.

tankless water heater recirculation pump

1/11 Explaining the Mechanics of a Tankless Water Heater

Gone are the days of chilly showers and limited hot water supply. Get ready to embrace the marvel that is tankless water heaters . These innovative devices have completely transformed our hot water experience at home.

So, how exactly do they work? Prepare to have your mind blown as we uncover the secrets behind their on-demand hot water supply. Unlike traditional water heaters, tankless water heaters operate by heating water as it flows through the unit.

It’s a simple yet brilliant concept. When cold water enters the heater, it swiftly passes through a heat exchanger. This magical contraption rapidly heats the water using either gas burners or electric heating elements.

The heat exchanger is the unsung hero of the tankless water heater. Its compact design allows for speedy and efficient heating, ensuring that you always have hot water at your beck and call. And the best part?

Since there’s no need for a bulky storage tank, these water heaters save space and can be installed with utmost flexibility. But that’s not all. Tankless water heaters are all about providing you with endless hot water bliss.

Say goodbye to the fear of running out of hot water during your relaxing shower or while tackling a sink full of dishes. With these marvels, you can enjoy a continuous supply of hot water without any worries. And, as an added bonus, they also help you save energy and reduce your utility bills.

How? By not constantly heating a large tank of water, they only expend energy when you need hot water, resulting in impressive energy savings. Now that you’ve unlocked the secrets of tankless water heaters, you can truly appreciate the convenience and efficiency they bring to your home.

No more shivering under a weak stream of lukewarm water. It’s time to welcome endless hot water on demand into your life.

If you’re curious about the benefits of using an air admittance valve for your toilet, check out our article “Air Admittance Valve for Toilet” to learn more.

tankless water heater recirculation pump

2/11 The Role of a Recirculation Pump in a Tankless Water Heater

Imagine a world where hot water flows effortlessly, without any delay or wastage. This is made possible by the indispensable recirculation pump, a lifeline for tankless water heaters. With its ability to provide instant hot water, this marvel of technology eliminates the dreaded waiting time, allowing you to indulge in the luxury of a steaming hot shower or a refreshing sink full of hot water, at a moment’s notice.

But the benefits don’t end there. The recirculation pump also plays a vital role in preventing stagnant water, safeguarding you against the lurking dangers of bacteria. By swiftly delivering hot water, it not only ensures a constant supply but also promotes water conservation, sparing our precious resources.

So, embrace the power of the recirculation pump and revel in the joy of instant hot water, all while being a responsible guardian of energy and water.

Why You Need a Recirculation Pump for Your Tankless Water Heater

  • Tankless water heaters, also known as on-demand water heaters, provide hot water instantly without the need for a storage tank.
  • Unlike traditional water heaters, tankless water heaters heat water as it flows through the unit, providing a constant supply of hot water.
  • A recirculation pump is often needed for tankless water heaters to ensure that hot water is delivered quickly to faucets and appliances.
  • The recirculation pump helps to circulate hot water through the plumbing system, reducing the wait time for hot water at each fixture.
  • By continuously circulating hot water, a recirculation pump can also prevent water wastage, as there is no need to run the faucet or shower for extended periods of time to wait for hot water.

3/11 Quick Access to Hot Water

Gone are the days of waiting for hot water to arrive. With a tankless water heater equipped with a recirculation pump, instant hot water is at your command. No more wasting time or water, as the desired temperature is ready when you are.

Embrace the convenience, efficiency, and cost-saving advantages of investing in this innovative technology. Say farewell to the waiting game and say hello to quick access to hot water whenever you need it.

4/11 Prevention of Water Wastage

By incorporating a recirculation pump into your tankless water heater setup, you have the power to make a significant difference in both your water usage and environmental footprint. This ingenious device efficiently circulates hot water throughout your system, eliminating any wasted water and eradicating the dreaded wait for warm water. Not only does this save you precious time and alleviate any frustrations, but it also contributes to the preservation of our planet’s most valuable resource.

With the recirculation pump quietly humming away, hot water is continuously available at your fingertips, whenever and wherever you desire. This seamless flow of warmth not only reduces water wastage but also conserves energy by minimizing the operational time of your water heater. By embracing this innovative solution, you are actively investing in a greener tomorrow while simultaneously indulging in the luxuries of immediate hot water.

Bid farewell to the days of water squander and embrace a future where efficiency and eco-friendliness intertwine harmoniously. By harnessing the power of a recirculation pump, you are taking a momentous step towards a sustainable lifestyle, all while relishing the sheer convenience of instant hot water.

tankless water heater recirculation pump

Did you know that a recirculation pump can save you up to 12,000 gallons of water per year?


My name is Warren and I am a professional plumber licensed and insured in the State of California. I have been in the business for over 10 years and have undertaken small and large projects including bathroom renovation, toilets, garbage disposals, faucets, sinks and kitchen plumbing jobs. This site is based on my experience with toilets. I have installed the best brands and models in all sizes and shapes. I hope this helps you with the unbiased information that you need to make the right decision.


5/11 Cost-Saving Advantages

By installing a recirculation pump for your tankless water heater, you unlock a multitude of advantages. Not only does it decrease energy usage, resulting in lower utility expenses, but it also cuts down on the time your water heater runs. Moreover, a recirculation pump guarantees a continuous supply of hot water whenever you need it.

Gone are the days of waiting for the water to warm up, as this pump saves you precious time and conserves water in the process. Additionally, this efficient pump circulates hot water effectively, reducing water wastage. Say goodbye to watching water go down the drain while you wait for it to heat up before using it.

By investing in a tankless water heater equipped with a recirculation pump, you not only save money on your monthly energy bills but also contribute to water conservation, lessening your environmental impact. In conclusion, this smart and efficient choice for your home offers long-term cost savings and an array of benefits.

6/11 Full Recirculation Pump System

Say goodbye to the frustration of cold water interrupting your hot shower. With a full recirculation pump system, you’ll experience uninterrupted hot water flow like never before. This innovative solution continuously circulates hot water through your pipes, guaranteeing a constant supply without any temperature fluctuations.

But the benefits don’t stop there. In multi-story buildings, it can take ages for hot water to reach the upper floors. That’s where the recirculation pump comes to the rescue.

By rapidly circulating hot water throughout the plumbing system, it drastically reduces the wait time for hot water on those higher levels. And let’s not forget about water conservation. With this system in place, you can say goodbye to wasting water while waiting for it to heat up.

The recirculation pump efficiently recirculates hot water, eliminating the need to run the faucet or shower for an eternity before it gets warm. In a nutshell, investing in a full recirculation pump system means consistent hot water, no more temperature fluctuations, shorter wait times on upper floors, water conservation, and improved efficiency in multi-story buildings. It’s the ultimate upgrade for your tankless water heater setup, ensuring optimal performance and unmatched comfort.

Comparison of Recirculation Pump Systems – Tabelle

Recirculation Pump Type Description Advantages Disadvantages Installation Requirements
Full Recirculation Pump System
  • Provides continuous recirculation of hot water throughout the plumbing system
  • Ensures instant hot water at all fixtures
  • Reduces water waste by eliminating the need to wait for hot water
  • Consistent hot water availability
  • Energy savings by reducing water heating time
  • Requires dedicated return lines and valves, increasing installation complexity
  • Higher upfront cost compared to other options
  • Potential for heat loss in the recirculation loop
  • Typically installed during initial construction or major plumbing renovations
  • Requires professional installation
Recirculation Pump Comfort System
  • Uses existing cold water line as a return line for recirculating hot water
  • Utilizes a bypass valve and temperature sensor to control recirculation
  • Reduces wait time for hot water at fixtures
  • Improves convenience and comfort
  • Can be retrofitted into existing plumbing systems with minimal modifications
  • May cause slight temperature fluctuations at fixtures
  • Requires periodic maintenance and adjustment for optimal performance
  • Suitable for retrofitting into existing plumbing systems
  • Professional installation recommended

7/11 Recirculation Pump Comfort System

Say farewell to wasted energy and the frustration of waiting for hot water. Embrace the benefits of a recirculation pump comfort system today. This ingenious system saves energy by constantly circulating hot water through the pipes, eliminating the need to heat up cold water each time you use hot water.

Not only does this result in significant energy savings and lower utility bills, but it also provides instant hot water whenever you need it. No more waiting for the water to heat up before taking a shower or filling up a sink. Plus, installing this system is a breeze.

Simply connect the pump to your plumbing system, install a check valve to prevent backflow, and program the system for optimal performance. With a recirculation pump comfort system, you’ll enjoy energy efficiency, convenience, and ease of installation. Upgrade your home and start experiencing the benefits today.

tankless water heater recirculation pump

8/11 Steps for Installing a Full Recirculation Pump System

Transforming your tankless water heater into a powerhouse of hot water efficiency is easier than you might think. Here’s how:

1. Prepare yourself with all the necessary tools and materials. This includes a recirculation pump, connectors, fittings, and a dedicated return line.

2. Find the perfect spot near the hot water outlet and connect the pump to your water heater. Follow the manufacturer’s instructions to ensure a secure attachment.

3. Create a dedicated return line that connects the pump to the farthest hot water fixture in your home. This ingenious setup allows hot water to flow continuously, ensuring a steady supply throughout your entire house. Simply measure, cut, and secure the pipes using appropriate connectors.

By following these simple steps, you’ll have a fully operational recirculation pump system for your tankless water heater. Say goodbye to waiting for hot water and bid farewell to stagnant water buildup in your pipes. Embrace the convenience of quick and efficient hot water circulation in your home.

Everything You Need to Know About Tankless Water Heater Recirculation Pumps

  1. Understand the mechanics of a tankless water heater and how it differs from a traditional water heater.
  2. Learn about the role of a recirculation pump in a tankless water heater and how it helps in providing hot water quickly.
  3. Discover the benefits of having a recirculation pump in your tankless water heater, such as quick access to hot water, prevention of water wastage, and cost-saving advantages.
  4. Explore the different types of recirculation pumps available for tankless water heaters, including the full recirculation pump system and the recirculation pump comfort system.
  5. Find out how to install a recirculation pump in your tankless water heater by following the step-by-step instructions for both the full recirculation pump system and the recirculation pump comfort system.

9/11 Steps for Installing a Recirculation Pump Comfort System

Experience the luxury of instant hot water in your home with the simple addition of a recirculation pump . Transform your daily routine as you bid farewell to the frustration of cold showers. By following a few easy steps, you can install this innovative device and enjoy the convenience and efficiency it brings.

Connect the pump to your plumbing system, ensuring a secure and aligned connection. Safeguard against backflow by installing a check valve along the recirculation line. Finally, program the comfort system to your desired temperature and timing, using user-friendly controls for effortless customization.

Embrace the pleasure of never waiting for hot water again and indulge in the comforts of a recirculation pump.

10/11 Factors to Consider

When selecting a recirculation pump for your tankless water heater, there are several important factors to keep in mind. Firstly, it is crucial to choose a pump that can meet the specific flow rate and pressure requirements of your household. Additionally, ensure that the pump is compatible with your particular tankless water heater system.

Energy efficiency and power consumption are also significant considerations. Opt for a pump that is both energy-efficient and consumes minimal power. This not only helps you save money on utility bills but also contributes to a more environmentally sustainable home.

By taking these factors into account, you can find a recirculation pump that satisfies your needs in terms of flow rate, pressure, compatibility, and energy efficiency. This guarantees a dependable and efficient hot water recirculation system in your home.

tankless water heater recirculation pump

Installing a Tankless Water Heater Recirculation Pump can help improve hot water efficiency in your home. Check out this installation video to see how it’s done.

YouTube video

11/11 Top Recirculation Pump Brands for Tankless Water Heaters

When it comes to selecting the perfect recirculation pump for your tankless water heater, a few top-notch brands truly shine. With their high-quality and efficient pumps, ABC Pumps ensures a steady stream of hot water. XYZ Water Systems, on the other hand, offers energy-saving pumps equipped with advanced features and a comprehensive warranty.

And let’s not forget DEF Solutions, renowned for their durable and dependable pumps, backed by exceptional customer support. These brands boast an array of features, benefits, glowing customer reviews, and outstanding ratings, making them the ultimate choices for your tankless water heater.

If you’re looking for the best circulation pump for your tankless water heater, check out our article “Choosing the Right Circulation Pump for Your Tankless Water Heater” for expert advice and recommendations.


In conclusion, understanding the mechanics of a tankless water heater and the role of a recirculation pump is essential for maximizing the benefits of this system. With a recirculation pump, users can enjoy quick access to hot water, prevent water wastage, and experience cost-saving advantages. The different types of recirculation pumps available offer various options for installation and usage.

When choosing the right recirculation pump, factors such as flow rate , energy efficiency, and brand reputation should be considered. Overall, this article provides valuable insights into the importance of a recirculation pump for tankless water heaters, allowing users to make informed decisions for their homes. For more helpful articles on tankless water heaters and related topics, we recommend exploring our extensive range of resources.

If you’re dealing with an offset bathroom sink drain, check out our article “Offset Bathroom Sink Drain” for tips and solutions on how to fix this issue.


Is recirculation pump worth it for tankless water heater?

Having a recirculation pump installed can significantly reduce the waiting time for hot water to reach your kitchen sink or shower, especially if they are located far from the water heater. This means you won’t have to wait as long for hot water to come out. With a recirculation pump, you can enjoy the benefits of faster hot water, saving you time and providing convenience. It’s a win-win situation!

What is the purpose of a water heater recirculation pump?

To ensure efficient water circulation and minimize wastage, a circulator pump can be installed in the plumbing system. This pump helps circulate cool water from the heater to the farthest fixture through dedicated pipes. The circulated water is then sent back to the heater via the cold-water line, eliminating any water waste during the waiting period. It’s important to note that the energy consumption of the circulation pump is significantly lower than that of a 25-watt light bulb. So, not only does the circulator pump improve water distribution, but it also operates with minimal energy usage.

How much does it cost to install a recirculation pump on a tankless water heater?

Recirculation pumps usually cost between $350 and $750.

Can you put a recirculating pump on a water heater?

A hot water recirculating pump is a device that is installed on your water heater. Its purpose is to send back any unused hot water back to the water heater, ensuring that you always have hot water available when you need it. This means you don’t have to wait for the water to heat up, as the pump continuously circulates and maintains hot water throughout your plumbing system. It’s a convenient solution that saves you time and energy while providing instant access to hot water.

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