Mastering Tankless Water Heater Recirculation Loop: A Comprehensive Guide

Tankless water heaters have become increasingly popular for their energy efficiency and endless supply of hot water. However, one common challenge with these systems is the delay in receiving hot water at the faucet due to the distance between the heater and the fixture. This is where a tankless water heater recirculation loop comes in.

A tankless water heater recirculation loop is a plumbing system that allows hot water to be instantly available at any faucet in the house, eliminating the need to wait for hot water to reach the desired temperature. In this article, we will explore how a tankless water heater recirculation loop works, the types of tankless water heaters that can use this system, the installation process, maintenance tips, and the benefits and considerations of using a tankless water heater recirculation loop. Whether you are a homeowner looking to upgrade your water heating system or a plumber seeking to provide the best solution for your clients, this article will provide valuable insights into the world of tankless water heater recirculation loops.

So let’s dive in and discover how you can enjoy instant hot water with the tankless water heater recirculation loop innovative plumbing solution .

The Facts at a Glance

  • A recirculation loop is a system that helps provide instant hot water by circulating it back to the water heater.
  • Tankless water heaters can benefit from a recirculation loop, as it helps eliminate the wait time for hot water.
  • Different types of tankless water heaters, such as Tempra Plus, Tempra Trend, and heat pump water heaters, can use a recirculation loop.

tankless water heater recirculation loop

How Does a Recirculation Loop Work?

Gone are the days of waiting for hot water to flow. The recirculation loop , a true game-changer, has completely transformed our hot water experience. With a simple pump, hot water is always at your fingertips, eliminating the need to endure chilly moments.

But what about maintaining the perfect temperature? Fear not, for the thermostat takes charge. Like a skilled conductor, it ensures that the water remains at your desired warmth.

So whether you’re yearning for a steamy shower or a soothing bath, the recirculation loop has got you covered. And the benefits don’t stop there. This ingenious system not only offers convenience, but it also saves energy and reduces water wastage .

With hot water constantly circulating, there’s no more wasting gallons of water as you wait for it to heat up. This translates to significant savings on your utility bills. Bid farewell to shivers and welcome the delight of instant hot water with a recirculation loop.

Upgrade your water heating system and indulge in the luxury of never having to wait again. It’s time to turn your hot water dreams into a blissful reality.

1/6 Why Use a Recirculation Loop with a Tankless Water Heater?

Gone are the days of waiting for hot water to heat up. Now, with the power of recirculation loops and tankless water heaters, convenience is at your fingertips. No more wasting time or water – just instant gratification.

But it’s not just about convenience . These systems also prioritize energy efficiency and sustainability . Say goodbye to running the faucet for minutes, watching precious water go down the drain.

With a recirculation loop, hot water flows effortlessly, saving both water and energy. And let’s not forget about the savings. By reducing the runtime of your tankless water heater, you’ll see a noticeable decrease in your utility bills.

It’s a win-win situation – instant hot water and lower costs. So why settle for less? Make the switch to a recirculation loop and tankless water heater for unparalleled convenience, energy efficiency, and financial benefits.

Say farewell to long waits for hot water and embrace a more efficient, economical lifestyle.

tankless water heater recirculation loop

Tempra Plus Tankless

Introducing the revolutionary Tempra Plus Tankless water heater. Experience unparalleled hot water delivery with precise temperature control for all your needs. From showers to dishwashing, it guarantees optimal performance.

But its advantages don’t stop there. Designed to accommodate larger households and commercial settings, it effortlessly serves multiple users simultaneously, ensuring an uninterrupted supply of hot water. And for those who embrace smart home technology, it can be conveniently controlled through your smartphone.

Whether you have a bustling family or a thriving business, the Tempra Plus Tankless is the ultimate solution for efficiency and convenience.

If you’re dealing with a toilet that won’t fill, check out our article on “Toilet Won’t Fill” for some helpful tips on how to troubleshoot and fix the issue.

Did you know that a recirculation loop 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.


Tempra Trend

In the realm of water heaters, the Tempra Trend reigns supreme. Designed for smaller households and compact spaces, this majestic appliance brings forth a wave of energy-saving prowess. With its ingenious mechanism, it only heats water when required, leaving behind a trail of waste elimination.

Astonishingly, despite its petite dimensions, it unveils a limitless supply of hot water whenever summoned. The process of installation is a breeze, effortlessly merging with the existing plumbing systems. In essence, the Tempra Trend bestows upon homeowners a trifecta of convenience, efficiency, and financial relief.

Heat Pump Water Heater

Step into a world of sustainable living and financial savings with the revolutionary heat pump water heater. By harnessing the power of the air, this cutting-edge technology effortlessly heats your water while minimizing energy consumption and utility expenses. Want to take it to the next level?

Pair it with solar panels and embrace the ultimate in eco-friendly living. With its compact design and impressive efficiency, the heat pump water heater is the perfect addition to any household. Make a difference for both the planet and your budget by embracing this remarkable appliance.

tankless water heater recirculation loop

Everything You Need to Know About Tankless Water Heater Recirculation Loops

  • A recirculation loop is a plumbing system that allows hot water to circulate continuously throughout a building, providing instant hot water at any fixture.
  • In a recirculation loop, hot water is constantly circulated through pipes, returning back to the water heater to be reheated.
  • A recirculation loop is commonly used with tankless water heaters to eliminate the wait time for hot water and ensure a constant supply of hot water.
  • There are different types of tankless water heaters that can be used with a recirculation loop, such as the Tempra Plus Tankless, Tempra Trend, and Heat Pump Water Heater.
  • The installation process of a recirculation loop with a tankless water heater may vary depending on the brand and model. For example, Stiebel Eltron offers specific installation instructions for their products.
  • Maintenance and flushing of a tankless water heater with a recirculation loop is important to ensure optimal performance and longevity of the system.

Stiebel Eltron Installation

To ensure the efficient and safe operation of your Stiebel Eltron tankless water heater, proper ventilation is crucial. It prevents heat buildup and blockage, promoting optimal performance. Safety is paramount, so installing a pressure relief valve is essential as it regulates pressure to prevent accidents or damage.

Always follow the manufacturer’s instructions for electrical connections to ensure a secure and proper setup. By taking these factors into account, you can guarantee the longevity and top-notch performance of your tankless water heater.

Installation Accessories Needed

To achieve maximum heat retention , monitor water flow , and ensure a secure and stable installation , it is crucial to have the necessary accessories when installing a recirculation loop with a tankless water heater. Insulation materials help prevent heat loss and maintain the desired water temperature, while pressure gauges ensure optimal system operation. Additionally, pipe clamps are essential for securing the installation and preventing leaks.

These accessories play a vital role in the successful and efficient installation of a recirculation loop with a tankless water heater.

2/6 Tips for Installing a Tankless Water Heater and Recirculation Loop

As you embark on the installation of a tankless water heater and recirculation loop, there are key considerations to bear in mind. Ensuring proper insulation of the pipes is paramount to sustain the heat and maintain the hot water’s temperature during its journey through the conduits. Employing pressure gauges during the installation process is indispensable for monitoring the water flow and making any required adjustments to optimize efficiency.

Equally vital is securing the pipes with clamps , thus safeguarding against any unwanted movement or potential leaks. By adhering to these essential tips, you can guarantee a steadfast installation, providing you with reliable hot water for years to come.

Tankless water heaters are known for their energy efficiency, but did you know that you can further optimize their performance with a recirculation loop? In this video, learn how to install a recirculating pump and bridge valve to achieve instant hot water throughout your home.

YouTube video

3/6 Maintenance and Flushing of a Tankless Water Heater with a Recirculation Loop

Maintaining the peak performance of your tankless water heater with a recirculation loop requires regular care and attention. Over time, sediment and minerals can accumulate, diminishing its efficiency and impeding its functionality. By flushing the system periodically, you can eliminate these deposits, averting blockages that hinder water flow and compromise the heater’s effectiveness.

To guarantee smooth operation, it is highly recommended to schedule professional maintenance annually. An expert technician will thoroughly inspect the system, clean any grimy components, and address potential issues before they escalate into major complications. Prioritizing routine maintenance and flushing will significantly extend the lifespan of your tankless water heater, ensuring it consistently delivers hot water whenever you need it.

Don’t underestimate the significance of this crucial upkeep to maintain optimal performance and efficiency in your tankless water heater with a recirculation loop.

tankless water heater recirculation loop

4/6 Hard Water Treatment for Tankless Water Heaters with a Recirculation Loop

Tankless water heaters with a recirculation loop can face challenges due to hard water. The mineral-rich composition of hard water can cause problems and decrease efficiency. To address this issue, it is essential to properly treat hard water.

One effective solution is the use of water softeners. These devices eliminate the minerals responsible for water hardness, preventing the formation of mineral deposits in the water heater. This not only helps maintain efficiency but also prolongs the lifespan of the heater.

Additionally, hard water can lead to mineral buildup within the water heater, which can obstruct pipes and reduce water flow. This can result in performance issues and costly repairs. To prevent this, descaling agents can be employed.

These agents dissolve and remove mineral deposits, enhancing water flow and overall efficiency. In conclusion, treating hard water is crucial for tankless water heaters with a recirculation loop. By utilizing water softeners and descaling agents, you can prevent mineral buildup and ensure optimal functionality of your water heater.

Bid farewell to hard water troubles and embrace the advantages of a high-performing tankless water heater.

Mastering the Installation of a Tankless Water Heater Recirculation Loop

  1. Understand the concept of a recirculation loop and how it works with a tankless water heater.
  2. Identify the types of tankless water heaters that can be used with a recirculation loop, such as the Tempra Plus, Tempra Trend, and Heat Pump Water Heater.
  3. Learn the installation process of a recirculation loop with a tankless water heater, including the Stiebel Eltron installation method and the necessary installation accessories.

Instant Hot Water

Experience the Luxury of Instant Hot Water Imagine a world where hot water is always at your fingertips, ready to be used with a simple twist of the faucet. No more waiting for the water to heat up, no more wasted time. Instant hot water brings convenience and comfort to our daily lives, transforming mundane tasks into enjoyable experiences.

The advantages of instant hot water are undeniable. From cooking to cleaning to bathing, you no longer have to wait for the water to reach the desired temperature. This saves you precious time and allows you to focus on what truly matters.

But it’s not just about convenience. The comfort that comes with instant hot water is unparalleled. Starting your day with a warm shower or effortlessly washing dishes with hot water adds a touch of luxury to your routine.

It’s the little things that make life more enjoyable, and instant hot water is one of them. And let’s not forget about the environmental benefits. With a recirculation loop, hot water constantly flows through the pipes, reducing water waste and making it an eco-friendly choice.

By embracing instant hot water, you’re not only enhancing your own life but also contributing to a more sustainable future. In conclusion, the advantages of instant hot water extend far beyond convenience. It’s about creating a lifestyle that is both comfortable and sustainable.

So why wait? Embrace the luxury of instant hot water and experience a world of convenience and comfort at your fingertips.

tankless water heater recirculation loop

Water and Energy Efficiency

Unleashing the Power of the Recirculation Loop: A Sustainable Solution In the realm of instant hot water, a revolutionary force has emerged – the recirculation loop. Its benefits extend far beyond convenience, as it stands as a true champion of water and energy conservation. By tirelessly circulating hot water, this groundbreaking system eliminates the need for constant water heating, resulting in substantial energy savings.

With the recirculation loop, hot water is always at your beck and call, without a trace of wasted energy. But that’s not all! This incredible loop also promotes efficient use of hot water, slashing waste.

Gone are the days of waiting minutes for hot water to finally arrive, only to see precious water go down the drain. With the recirculation loop, hot water is forever within reach, drastically reducing the need to let the faucet run and conserving water. By embracing the recirculation loop alongside your tankless water heater, you not only enjoy the luxury of instant hot water, but also become a force for water and energy efficiency .

Lower utility bills and a positive impact on the environment await. Bid farewell to wasted resources and welcome a more sustainable and efficient way of relishing hot water in your abode.

Comparison of Tankless Water Heater Options – Tabelle

Type of Tankless Water Heater Key Features Benefits
Tempra Plus Advanced flow control technology, digital temperature display, precise temperature control Provides instant hot water on demand, ensuring no waiting time for hot water. The advanced flow control technology regulates the water flow to maintain a consistent temperature, preventing temperature fluctuations. The digital temperature display allows users to easily monitor and adjust the water temperature. The precise temperature control feature ensures accurate temperature settings, resulting in a comfortable and customized bathing experience. This tankless water heater is energy efficient, reducing energy consumption and leading to cost savings on utility bills.
Tempra Trend Self-modulating technology, compact design, easy installation The Tempra Trend tankless water heater utilizes self-modulating technology, which adjusts the power output based on the water flow rate and desired temperature. This feature optimizes energy usage and ensures a steady supply of hot water. Its compact design allows for space-saving installation, making it suitable for small homes or limited spaces. The easy installation process saves time and effort. With continuous hot water availability, users can enjoy uninterrupted showers and reduced water wastage. Additionally, the Tempra Trend is designed to be highly energy efficient, resulting in significant energy savings and reduced greenhouse gas emissions.
Heat Pump Water Heater Utilizes heat from surrounding air, energy efficient, reduces greenhouse gas emissions The heat pump water heater utilizes heat from the surrounding air to heat the water, making it an energy-efficient option. It operates by transferring heat rather than generating heat, resulting in significant energy savings compared to traditional water heaters. This eco-friendly technology reduces greenhouse gas emissions and helps combat climate change. The heat pump water heater also offers a long lifespan, making it a durable and sustainable choice for homeowners. With high energy savings and a reduced environmental impact, this type of tankless water heater is a cost-effective and eco-friendly solution for heating water.

Cost Savings

Say farewell to costly expenses and embrace a world of savings with a tankless water heater equipped with a recirculation loop. Not only will you revel in the luxury of instant hot water, but you’ll also witness long-term financial benefits. Bid adieu to exorbitant maintenance and repair costs as this efficient system minimizes the need for expensive fixes.

By heating only the water you require, wasted energy becomes a thing of the past, resulting in lower utility bills. Furthermore, the recirculation loop aids in reducing water waste, offering you even more opportunities for cost savings. With this ingenious solution, you can enjoy hot water without fretting over unnecessary expenditures.

So, why wait? Make the switch to a tankless water heater with a recirculation loop and welcome a future filled with both warmth and financial prosperity.

If you’re curious about the different types of urinals available, check out our article “Types of Urinals” to learn more and find the perfect one for your needs.

tankless water heater recirculation loop

5/6 Drawbacks and Considerations when Using a Recirculation Loop with a Tankless Water Heater

When considering the use of a recirculation loop with a tankless water heater, it is important to be aware of the drawbacks and considerations involved. One such drawback is the increased energy consumption due to the constant circulation of hot water. This constant operation of the pump leads to higher energy usage, which can impact utility costs.

Additionally, there is a higher upfront cost associated with installing a recirculation loop and the necessary equipment. This includes additional plumbing and a pump, which adds to the overall expense. However, it is essential to consider the long-term benefits and potential cost savings that a tankless water heater can provide.

Another consideration is the potential reduction in water pressure in certain areas. The continuous circulation of hot water can put strain on the plumbing system, resulting in lower water pressure. This is particularly important to keep in mind if you have areas in your home that require strong water pressure, such as showers or sprinkler systems.

Despite these drawbacks, it is important not to overlook the benefits of using a recirculation loop with a tankless water heater . With proper planning and installation, this setup can offer convenience , energy efficiency , and significant cost savings that outweigh any potential drawbacks.


In conclusion, a recirculation loop with a tankless water heater offers numerous benefits, including instant hot water, water and energy efficiency, and cost savings. By providing continuous hot water throughout the home, users can enjoy the convenience and comfort of never having to wait for hot water again. Additionally, the recirculation loop helps reduce water waste and energy consumption, making it an environmentally friendly choice.

While there are some considerations and maintenance requirements to keep in mind, the overall advantages make it a worthwhile investment. We hope this article has provided valuable insights into the benefits and installation process of a recirculation loop with a tankless water heater. For further information on related topics, we recommend exploring our other articles on tankless water heaters and energy-efficient home solutions.

If you’re wondering about the perfect shelf height above your toilet, check out our article “Shelf Height Above Toilet” to find the answer and make your bathroom more organized and functional.


Can you put a recirculating line on a tankless water heater?

Tankless water heaters do not automatically provide instant hot water. However, you can easily achieve instant hot water by installing a recirculation pump. The installation process and operation of the recirculation pump can be tailored to suit your specific needs and the layout of your home. This allows you to enjoy the convenience of instant hot water whenever you need it.

What is a heating recirculation loop?

This setup establishes a closed loop connecting the water heater and the faucet. The pump draws the unused hot water back through this loop, ensuring that hot water is readily available when you turn on the faucet. With this system, there is no stagnant water left in the pipes to cool down, resulting in a more efficient use of water and eliminating the need for waiting.

Can a hot water recirculating pump run continuously?

Circulator pumps are frequently used and operate continuously, even when hot water is not being actively used.

What is the best practice when installing a recirculating system on a single tankless water heater?

Here are some helpful tips for installing a tankless water heater system with a recirculation feature. To ensure efficient usage, it is recommended to use a timer for the recirculation function instead of an aquastat. The timer can be programmed to activate during the periods of highest demand for hot water, such as early morning and evening. This will help ensure that hot water is readily available when needed the most. Additionally, it is important to set the thermostat on both the mini tank and tankless water heater to similar temperatures for optimal performance.

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