Maximize Efficiency: Choosing the Best Circulation Pump for Your Tankless Water Heater

Are you tired of waiting for hot water to reach your faucet or shower? Do you want to save money on your water bills and reduce water waste? If so, then a circulation pump for tankless water heaters, also known as a circulation pump for tankless water heater, might be just what you need.

In this article, we will explore the importance of circulation pumps for tankless water heaters, including the circulation pump for tankless water heater, and how they work to provide you with instant hot water. Whether you’re a homeowner looking to upgrade your water heating system or a curious individual seeking to understand the science behind it, this article is here to help. So let’s dive in and discover how a circulation pump for tankless water heater can revolutionize your hot water experience.

The most important findings at a glance

  • Recirculation pumps are used in tankless water heaters to accelerate hot water supply.
  • There are different types of recirculation pumps, including full recirculation pump systems and recirculation pump comfort systems.
  • Using a recirculation pump with a tankless water heater offers benefits such as getting hot water faster, preventing water waste, and saving money.

circulation pump for tankless water heater

1/12 What is a Recirculation Pump and How Does It Work?

Bid farewell to the tiresome wait for hot water with the revolutionary recirculation pump . This ingenious device guarantees a constant supply of hot water whenever you desire. By effortlessly circulating hot water throughout the pipes, it eradicates the exasperating delay associated with conventional water heaters.

No longer will you find yourself idly lingering, yearning for the water to reach its desired temperature. With the remarkable recirculation pump , a simple twist of the faucet unleashes a torrent of steaming hot water, bidding adieu to cold water shocks and ushering in the era of instantaneous indulgence .

If you’re considering installing a recirculation pump for your tankless water heater, check out our article on “Tankless Water Heater Recirculation Pump” to learn about the benefits and how it can improve your hot water system.

2/12 Why is a Recirculation Pump Needed for Tankless Water Heaters?

Tankless water heaters have become increasingly popular due to their energy efficiency and space-saving design. However, they often suffer from a common drawback – a delay in delivering hot water when the faucet is turned on. Enter the recirculation pump.

A recirculation pump is a crucial companion to tankless water heaters, effectively solving this issue while offering a multitude of benefits. Firstly, it significantly increases water efficiency and reduces wastage. By continuously circulating hot water through the pipes, it ensures that hot water is readily available whenever you need it.

This eliminates the frustrating wait for water to heat up, saving you both time and water. In addition, a recirculation pump provides instant hot water, eliminating any annoying wait times. It keeps hot water flowing consistently, guaranteeing that there is always hot water waiting for you at the faucet.

Furthermore, a recirculation pump improves energy efficiency by minimizing standby heat loss. Traditional tank water heaters continuously heat the water in the tank, resulting in unnecessary energy waste when not in use. With a recirculation pump, hot water is only circulated when necessary, thereby reducing energy consumption and lowering utility bills.

In conclusion, a recirculation pump is an essential addition to tankless water heaters. It enhances water efficiency, provides instant hot water, and improves energy efficiency. By investing in a recirculation pump, you can enjoy the convenience of hot water at your fingertips while also reducing water and energy waste.

circulation pump for tankless water heater

3/12 Why It Takes Longer to Get Hot Water from a Tankless Water Heater

Obtaining hot water from a tankless water heater may require more patience compared to traditional water heaters. There are a few reasons for this. Firstly, if the pipes are not properly insulated, heat loss can occur, resulting in less hot water reaching your faucet.

Additionally, tankless water heaters are often located further away from the faucet, which can also increase the wait time. Lastly, a low water flow rate can further prolong the time it takes for hot water to come out. However, there are solutions to these challenges.

Improving pipe insulation, reducing the distance between the heater and faucet, and optimizing the water flow rate can all help alleviate these issues.

If you’re interested in learning more about the benefits of a Navien tankless water heater with a recirculating pump, check out our article on “Navien Tankless Water Heater with Recirculating Pump” .

Comparison of Recirculation Pump Types for Tankless Water Heaters (Tabelle)

Recirculation Pump Type Description/Function Pros Cons Suitable for Tankless Water Heaters
Traditional Recirculation Pump A traditional recirculation pump is designed to continuously circulate hot water through the plumbing system, ensuring hot water is quickly available at each fixture. – Provides instant hot water
– Reduces water wastage
– Can be installed in existing plumbing systems
– Requires electricity to operate
– May increase energy consumption
– Can be noisy
Timer-Based Recirculation Pump A timer-based recirculation pump is programmed to circulate hot water at specific times of the day, reducing energy consumption during periods of low demand. – Energy-efficient
– Reduces water wastage
– Can be programmed for convenience
– Hot water may not be instantly available
– Requires electricity for timer operation
– May require additional plumbing modifications
On-Demand Recirculation Pump An on-demand recirculation pump uses motion sensors or temperature sensors to activate the pump when hot water is required, eliminating the need for continuous circulation. – Energy-efficient
– Reduces water wastage
– Provides instant hot water when needed
– Requires electricity to operate
– Initial installation cost may be higher
– May require professional installation
Gravity-Based Recirculation Pump A gravity-based recirculation pump uses the natural convection of hot water to circulate it back to the water heater without the need for electricity or additional plumbing components. – No electricity required
– Energy-efficient
– Minimal maintenance
– Relies on proper plumbing design
– May not provide instant hot water
– Limited to certain plumbing configurations
No Recirculation Pump Without a recirculation pump, hot water takes time to reach the fixtures, resulting in longer wait times and potential water wastage. – No additional equipment or installation costs
– Simplicity
– Longer wait times for hot water
– Increased water wastage
– Inconvenience for users

4/12 The Role of Recirculation Pumps in Accelerating Hot Water Supply

Say farewell to the frustration of waiting for hot water with the marvel of recirculation pumps. These essential devices not only provide instant hot water but also enhance water usage efficiency. By continuously circulating hot water through the pipes, they eliminate wastage and promote eco-friendly practices.

With recirculation pumps, you’ll never have to endure cold showers or wait for hot water again. Experience the convenience and efficiency they bring to your home.

5/12 Full Recirculation Pump System vs. Recirculation Pump Comfort System

As you embark on the journey of selecting a recirculation pump system for your tankless water heater , you are faced with two compelling choices: the full system and the comfort system. While the full system promises the allure of instant hot water and unparalleled efficiency, it comes at a higher cost and necessitates professional installation. On the other hand, the comfort system presents a more economical option that can be tackled as a DIY project, but it may not deliver the same level of energy efficiency.

Reflect upon your priorities, budget, and desire for professional expertise to guide your ultimate decision.

If you’re tired of waiting for hot water, check out our article on the benefits of a recirculating pump for tankless water heaters to keep the warm water flowing instantly.

circulation pump for tankless water heater

Did you know that using a recirculation pump with your tankless water heater 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.


6/12 Understanding the Differences and Choosing the Right One For Your Home

When it comes to selecting a recirculation pump system for your home, there are two options to weigh: a complete system or a comfort system. The key distinction lies in the cost and installation process. A complete recirculation pump system entails the installation of hot water return lines to every faucet or fixture in your home.

This can be a pricey and time-consuming endeavor. In contrast, a comfort system utilizes the existing cold water line to create a loop system, which is simpler and more cost-effective. Both types of systems offer energy efficiency advantages by reducing standby heat loss and improving water usage efficiency.

However, a complete system may have a slight edge in energy efficiency as it ensures a constant supply of hot water at each faucet. Ultimately, the decision hinges on your specific needs and budget. Take into account factors such as the size of your home, the number of faucets or fixtures you desire instant hot water access to, and your energy efficiency objectives.

Seeking guidance from a professional plumber can also assist you in making an informed choice.

7/12 Getting Hot Water Faster: Convenience at Its Best

In the quest for quicker access to hot water, convenience reigns supreme. No longer must we endure the interminable wait for water to warm before indulging in a soothing shower or tackling a mound of dishes. Enter the recirculation pump, a veritable savior for owners of tankless water heaters.

By ceaselessly circulating hot water through the pipes, this ingenious device ensures a perpetual supply of warmth, available at a moment’s notice. The crowning glory of a recirculation pump lies in its ability to expedite the delivery of hot water. No longer must we idly twiddle our thumbs as the water sluggishly traverses the labyrinthine network of pipes, gradually heating up to an acceptable temperature.

Instead, instant gratification is the order of the day , saving us precious time and sparing us the anguish of anticipation. But the benefits of a recirculation pump extend beyond mere efficiency . They bestow upon us a newfound sense of convenience in our daily water-related endeavors.

Whether we find ourselves luxuriating in a steaming shower, laundering our garments, or scrubbing away at stubborn dishes, the knowledge that hot water is readily available imbues these tasks with an air of ease and pleasure. So bid farewell to frigid showers and embrace the marvel of hot water on demand. With a recirculation pump in tow, the realm of convenience beckons, and the days of interminable waiting become a distant memory.

circulation pump for tankless water heater

Accelerating Hot Water Supply: Exploring the Role of Recirculation Pumps in Tankless Water Heaters

  1. Understand the purpose of a recirculation pump in a tankless water heater.
  2. Learn about the science behind hot water dispensation in tankless water heaters.
  3. Discover why it takes longer to get hot water from a tankless water heater.
  4. Explore the role of recirculation pumps in accelerating hot water supply.
  5. Learn about the different types of recirculation pumps available for tankless water heaters.
  6. Understand the differences between a full recirculation pump system and a recirculation pump comfort system.
  7. Discover the benefits of using a recirculation pump with your tankless water heater.

8/12 Preventing Water Waste: An Eco-Friendly Approach

Make a significant difference in your water usage and environmental impact by installing a recirculation pump. These pumps keep hot water readily available, eliminating the need for excessive water usage and reducing your water bills. By promoting water conservation and embracing a sustainable lifestyle, you can contribute to a greener future.

Take the step towards a more sustainable household and install a recirculation pump today.

9/12 Saving Money: Efficiency that Reflects in Your Bills

Experience the convenience and cost-saving benefits of recirculation pumps. Say goodbye to wasteful water heating and hello to instant hot water. With a recirculation pump, you can eliminate the wait and start saving time and money.

Gone are the days of letting the faucet run, waiting for hot water to reach you. With a recirculation pump, unnecessary water heating and wastage become a thing of the past. No more wasted water and energy, just pure efficiency.

But the benefits don’t stop there. By reducing energy consumption , recirculation pumps also help lower your utility bills. These pumps are designed to continuously circulate hot water, without constantly heating it.

This smart technology saves you money while promoting energy efficiency . In a nutshell, recirculation pumps offer a win-win situation. Enjoy instant hot water, reduce your energy consumption, and watch your utility bills decrease.

With their eco-friendly approach, these pumps are the perfect solution for your home. Say hello to savings and efficiency, and bid farewell to unnecessary water heating and wastage.

circulation pump for tankless water heater

How a Recirculation Pump Enhances the Performance of Your Tankless Water Heater

  • A recirculation pump is a device that helps to keep hot water circulating in a closed-loop system, ensuring that hot water is readily available at every tap in your home.
  • When a tankless water heater is installed, it may take longer for hot water to reach the faucets due to the distance between the heater and the faucet. A recirculation pump solves this problem by continuously circulating hot water through the pipes, so hot water is instantly available when you need it.
  • There are two main types of recirculation pumps for tankless water heaters: full recirculation pump systems and recirculation pump comfort systems. The full recirculation pump system continuously circulates hot water throughout the entire plumbing system, while the recirculation pump comfort system uses a bypass valve to recirculate hot water only to the faucets that are frequently used.
  • Using a recirculation pump with your tankless water heater offers several benefits. Firstly, it provides convenience by giving you instant access to hot water without having to wait for it to reach the faucet. Secondly, it helps prevent water waste by eliminating the need to run the tap until hot water arrives. Lastly, it saves energy and money by reducing the amount of water that needs to be heated, resulting in lower utility bills.
  • Installing and maintaining a recirculation pump is relatively straightforward. Some tankless water heaters come with built-in recirculation pumps, while others require separate installation. If you need to install a recirculation pump, it involves connecting the pump to the water heater and setting up the necessary plumbing connections. Regular maintenance includes checking for any leaks, flushing the system periodically, and ensuring the pump is functioning properly.

10/12 Do Tankless Water Heaters Come with Recirculation Pumps or Do They Need Separate Installation?

Let us delve into the realm of tankless water heaters, those marvels of energy efficiency and instant hot water. However, our focus today shall shift to the enigmatic recirculation pumps. Do they accompany the system or must they be installed separately?

Let us embark on this exploration together. In the realm of tankless water heaters, there exist two types: those with built-in recirculation pumps and those that require separate installation . The key distinction lies in the installation requirements.

Tankless water heaters with built-in pumps often demand additional plumbing modifications, such as a dedicated return line. Conversely, separate installation involves connecting the pump to the existing plumbing. Now, let us consider the cost.

Tankless water heaters with built-in pumps bear a higher upfront expense due to their additional features and installation demands. However, they offer long-term energy savings and convenience, particularly for larger households with a voracious appetite for hot water. Deciding upon a tankless water heater with a built-in recirculation pump bears its own advantages.

It obviates the need for separate installation and guarantees a perpetually available supply of hot water. Nonetheless, drawbacks do exist, such as a higher initial cost and a more intricate installation process. Ultimately, the choice rests upon your needs and budget.

Engaging in a consultation with a professional plumber shall prove invaluable in determining the optimal option for your abode. In conclusion, the presence or absence of recirculation pumps in tankless water heaters is a matter of variability. The decision between a built-in pump or separate installation hinges upon installation requirements, cost considerations, and personal preferences.

Reflect upon your hot water requirements and seek guidance from a professional to ascertain the finest choice for your dwelling .

11/12 Steps for Installing a Recirculation Pump in Your Tankless Water Heater

Enhance the efficiency and convenience of your tankless water heater with the addition of a recirculation pump. Follow these simple steps for installation:

1. Prepare the necessary tools: pipe cutter, wrenches, pipe fittings, and Teflon tape.

2. Strategically position the pump on the hot water outlet pipe of the water heater. This ensures a continuous flow of hot water, guaranteeing its availability at all times.

3. Securely connect the pump using pipe fittings and Teflon tape, ensuring all connections are tight and leak-free.

4. Test the pump after installation. Activate the water heater and carefully inspect for any leaks or unusual sounds. Adjust the flow rate and timer settings to optimize its performance.

By following these straightforward instructions, you can effortlessly install a recirculation pump in your tankless water heater, enjoying the benefits of instant hot water and improved efficiency.

circulation pump for tankless water heater

Are you curious about the importance of a circulating pump for tankless water heaters? In this video, we delve into what a circulating pump is and why it plays a crucial role in ensuring hot water is readily available when you need it. Let’s dive in!

YouTube video

12/12 Maintaining Your Recirculation Pump for Long-Term Efficiency

To maximize the efficiency and lifespan of your recirculation pump, prioritize regular maintenance . Follow these simple steps:

1. Maintain a clean and debris-free pump by regularly cleaning and flushing it. This will ensure smooth water flow and prevent any potential blockages.

2. Don’t overlook worn-out parts or components. Regularly inspect and replace them as needed to maintain the pump’s optimal performance.

3. Keep the pump well-lubricated to minimize friction and avoid excessive wear on moving parts. Apply lubricant regularly to keep the pump running smoothly and quietly. By implementing these maintenance practices, you’ll be able to prolong the life of your recirculation pump and ensure it operates at its peak performance.


In conclusion, understanding the importance of a recirculation pump for tankless water heaters is crucial for maximizing the efficiency and convenience of your system. By recirculating hot water, these pumps help to reduce the time it takes to get hot water at your taps, saving you time and providing instant comfort. Additionally, the use of a recirculation pump can help to minimize water waste and save money on your utility bills.

Whether you choose a full recirculation pump system or a recirculation pump comfort system, the benefits of using a recirculation pump with your tankless water heater are undeniable. Installation and maintenance are relatively straightforward, ensuring long-term efficiency. Overall, this article provides valuable insights into the science behind hot water dispensation in tankless water heaters and highlights the benefits of incorporating a recirculation pump into your system.

For more information on tankless water heaters or related topics, we recommend exploring our other articles on water heater maintenance, energy-efficient appliances, and home plumbing solutions.


Can you use a recirculation pump with a tankless water heater?

Tankless water heaters alone do not offer instant hot water; however, you can easily achieve instant hot water by installing a recirculation pump. The installation and functioning of the recirculation pump can be tailored to suit your preferences and the specific needs of your home. This information was last updated on September 27, 2021.

What kind of pump do I need for a tankless water heater?

To flush a tankless water heater, you will need special equipment known as a submersible utility pump. It is recommended to use a pump with 1/6 horsepower for effective descaling. However, it is important to exercise caution if you opt for a stronger pump exceeding 1/4 HP.

How much does it cost to add a recirculating pump to a tankless water heater?

The cost of a recirculation pump can vary depending on its horsepower. These pumps are available in different price ranges, typically ranging from $350 to $750.

Do you need a circulating pump with a water heater?

Typically, when someone wants hot water, they have to let the tap run for a while until the water from the heater reaches them. This results in a significant amount of cool water going down the drain, which could have been used for other purposes.

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