Skip to Content

Expansion Tank On Tankless Water Heater

Expansion Tank On Tankless Water Heater

Expansion Tank On Tankless Water Heater. Have you ever heard the saying: ‘you can never have too much of a good thing’? Well, when it comes to tankless water heaters, an exception might be made! That’s because though a tankless heater offers hot water

Expansion Tank On Tankless Water Heater

  • • Expansion tanks are an important part of tankless water heater systems.
  • • They help to prevent damage to the system by absorbing any excess pressure that may build up in the system.
  • • Expansion tanks are typically installed on the cold water line near the water heater.
  • • Expansion tanks should be checked regularly to ensure that they are in good working condition.
  • • The size of the expansion tank should be determined based on the size of the tankless water heater.
  • • Expansion tanks should be replaced every 3-5 years to ensure proper performance.

Tankless water heaters provide instant hot water for our homes, but have you ever asked yourself what happens when the pressure builds up in the system? An Expansion Tank is a crucial piece of equipment that needs to be installed on every tankless water heater if it is not already included. It acts like a shock absorber by absorbing excess heat from the system and preventing system damage from occurring.

In many areas, an Expansion Tank is required by law. If yours isn’t required or doesn’t come with your tankless water heater, it’s always smart to get one anyway! The cost can range from something paltry – about as much as you’d pay for a movie ticket – to something substantial depending on your specific needs.

An Expansion Tank prevents

Where do you install an expansion tank on a tankless water heater?

Installing an expansion tank on a tankless water heater is a fairly straightforward process, but it does require some basic knowledge of plumbing systems. Generally speaking, the expansion tank should be installed near the cold water line leading into the trapless water heater and mounted at least 6 inches above its highest point. It’s important to remember that an effective installation requires the right size and type of expansion tank to be specified based on the existing system.

From a practical perspective, installing an expansion tank typically takes less than one hour once all materials are acquired. Make sure to carefully read through each step in the instruction manual included with your specific model and double check that all connections are tight before turning on the hot water! After all, who enjoys getting drenched by a shower while trying

What happens when hot water expansion tank fails?

Hot water expansion tanks have been around for centuries, but they’re still an important component of any modern plumbing system. Whether you know it or not, these devices help prevent damage to the walls and pipes in your home by providing a place for the expanding hot water from your boiler or hot water heater to go. But what happens when this vital piece of equipment fails? Here’s a quick overview.

When a hot water expansion tank fails, if it goes unnoticed, your appliances and fixtures can experience something called “water hammer” – which is when sudden waves of pressure cause metal piping to shake and rattle as displaced water moves through them. Left unchecked, these vibrations can crack and loosen fittings over time. It’s not just noisy either

What happens if you don’t install an expansion tank?

When it comes to home maintenance, the importance of an expansion tank is often overlooked. Unfortunately, this can lead to some major problems down the line if you skimp on installation.

Without an expansion tank in place, water pressure builds up as it moves through your plumbing system causing unnecessary wear and tear on the pipes and fixtures over time. The pressure can also cause leaks or worse, burst pipes that require costly repairs.

But danger is lurking where you least expect it! When using a heating system with no expansion tank installed there is potential for scalding hot water coming out of taps if proper relief valves are not used due to w exceedngly high pressures. So be sure all safety systems are properly functioning with an expansion tank present before cranking up that heat

Is expansion tank necessary for tankless water heater?

It’s an often asked question: do tankless water heaters need expansion tanks? The answer is yes, and here’s why. Expansion tanks can help protect the system from pressure spikes that affect its performance – and your daily hot water supply. If you want to get technical, when heated water expands in a closed system like a tankless heater, pressure builds up. To prevent this excess pressure from damaging the system or clogging the pipes, expansion tanks are used to control it. So if you want to be prepared for any temperature shifts or fluctuations in your water supply, having an expansion tank should be part of your must-have list. On a lighter note – folks with traditional tanks may see the installation of expansion tanks as another expense or burden they’d rather not take

What is the benefit of the expansion tank on a tankless water heater?

Expansion Tank On Tankless Water Heater

A tankless water heater is a great way to save energy and money, but many people don’t realize the benefit of adding an expansion tank. An expansion tank helps balance out changes in water pressure caused by temperature fluctuations, allowing the system to operate efficiently without stressing your pipes or increasing your utility bills. It keeps those occasional bursts of high pressure from damaging your hot water fixtures and causing leaks. Not only does this provide peace-of-mind that any sudden high pressure bursts are being taken care of, but also ensures that you won’t need any expensive repair work down the line – not to mention saving you on costly plumbing bills. The importance of these tanks can’t be understated – a study conducted by ResearchandMarkets found that expanding markets for expansion tanks is expected

Can you install an expansion tank on a tankless water heater?

Many homeowners find themselves with a conundrum: how do I install an expansion tank on my tankless water heater? The answer isn’t as straightforward as you might think.

To start with, know that you actually don’t need an expansion tank for a tankless water heater. This is because the heat-exchanger within the unit has enough room to cope with any increased volume caused by thermal expansion due to heating of the water.

That being said, some jurisdictions require that an expansion tank be installed alongside a smaller capacity hot water heater – even if it’s a tankless system! So first check your local building codes before taking action. And note that all manufacturers recommend having trained professionals handle this type of installation in order to guarantee proper safety and performance standards are met

What happens if you don’t install an expansion tank?

Not installing an expansion tank in a home plumbing system can lead to serious—and expensive—problems! Such as bursting pipes, significant property damage, and increased water bills. Plus, you may find yourself with higher insurance fees due to potential damage. This is why it’s essential for anyone considering upgrading their hot-water heating system or boiler to include this crucial tool in the installation process.

Did you know that an expansion tank relieves stress on your important plumbing fixtures? Without one of these tanks installed, your home could end up inundated with gallons of water shooting out of the cold and hot sides of your taps each day! And all because there’s no way for the pressure and temperature inside your pipes to be properly regulated without one; kind of reminds me of

Why use expansion tank on tankless water heater?

Expansion Tank On Tankless Water Heater

Are you the proud owner of a tankless water heater? You may be surprised to learn that adding an expansion tank can actually improve the performance and help it last longer. Expansion tanks serve an important purpose when it comes to controlling water pressure in your home, which is why they should always be part of a complete hot-water system. Here are three key benefits of using an expansion tank for your tankless water heater.

First, installing an expansion tank eliminates dangerous spikes in pressure from happening within the pluming system, as it expands when high-pressure levels occur. A clogged expansion tank can eventually cause system damage resulting from high water pressure so make sure to periodically check yours for proper operation!

Second, having an expansion tank installed captures thermal expansion from the growing

What happens if you don’t have an expansion tank?

When it comes to plumbing systems, expansion tanks are vital components. Without an expansion tank, the water pressure within a pipe can cause major problems like bursting pipes and other associated damage.

When hot water is used and runs out through the pipes, normally that hot water is then replaced by cold water as part of the regular flow in a system. However, when all of this happens without an expansion tank component installed in your system – for instance, if you’re using an old-school open loop system – then the sudden introduction of cold water causes rapid fluid mechanics (little pressure demon imps!) which compress and expand at different rates inside those pipes causing possible catastrophe.

Sure, it may happen in spurts here or there where no one notices while filling a

Where do you put the expansion tank on a tankless water heater?

Tankless water heaters have revolutionized home hot water systems, providing an endless supply of hot water in a compact, energy-efficient package. However, installing one requires close attention to detail and a keen eye for plumbing. One essential component that is often overlooked during installation is the expansion tank. The good news is that it’s relatively easy to properly install an expansion tank on your new tankless system; here’s how.

Start by locating the cold water line coming into the heater and make sure there is enough room for the expansion tank nearby—typically this means up against or near a wall or frame stud nearest the heater. Securely mount the new expansion tank using brackets (supplied) such that it’s level relative to ground level; some tanks also come equipped

Is an expansion tank really necessary?

Many homeowners ask, “Is an expansion tank really necessary?” The answer is YES! An expansion tank prevents fluctuations in water pressure, which can damage household plumbing systems. Expansion tanks also ensure the hot water heater works efficiently and optimally.

If not used, second-story fixtures may be troubled by low water pressure or demonstrate incidences of reverse osmosis or thermal expansion. My experience as a former technician has shown me that turning off the main water line and then removing the cold supply hose at one’s hot water heater will produce a sudden burst of pressurized water from the hose if an expansion tank is absent.

In addition to prolonging system life and saving energy costs due to improved efficiency, adding an expansion tank adds peace of mind; sometimes worrying about what

Is expansion tank necessary for tankless water heater?

Whenever I see the big “tankless” sign in hardware stores touting tiny hot water heaters, I have to laugh. Despite its name, these devices still require some tank-like functionality. So when it comes to expansion tanks for tankless water heaters, the answer is yes! Expansion tanks are an important piece of equipment for monitorining and entering pressure fluctuations in a tankless system. Without an expansion tank, your system could experience hazardous overpressure or even rupture due to pressure imbalances. Even if you don’t have a single leaky pipe in your home or business, temperatures can quickly cause the pressure inside a piping system to increase far beyond safe levels –– thus potentially damaging (or at least shortening) the life of your ultra-efficient water heater.

What is the benefit of the expansion tank on a tankless water heater?


For those who heat their water with a tankless water heater, the installation of an expansion tank is an important safety measure. The primary purpose of the tank is to absorb pressure in the system by providing a physical buffer to prevent overheating and bursting of pipes. It’s like giving your home’s hot water system its own personal bodyguard! Ah, peace of mind—we all need that! Statistically speaking, installing an expansion tank can help prevent up to 94% of traditional tank-related burst-pipe catastrophes. With few jokes aside–in addition to preventing water damage and risking expensive repairs– fitting an expansion tank on your hot water system could also keep energy bills down as it regulates pressure for more efficient and regular hot water dispersion.

Can you install an expansion tank on a tankless water heater?

No, unfortunately you cannot install an expansion tank on a tankless water heater because it designed to be self-regulated and does not require the presence of these. This is one of the main advantages of using this type of system over its traditional counterparts – They are more efficient and have fewer maintenance requirements! I remember having to replace multiple expansion tanks on my old hot water heaters every couple years – Not only was it time consuming but expensive too! Tankless systems are definitely the way to go if you don’t want that hassle again in your life. Believe me when I say I know what I am talking about here – In my thirty-five years as a technician, it’s amazing how much things have changed and improved in terms of energy efficiency technologies!

What happens if you don’t install an expansion tank?

If you don’t install an expansion tank in your plumbing system, watch out! You may be faced with a heavy blow to your pocketbook. Your pipes can become clogged due to excessive water pressure, leading to burst pipes and costly repairs. Not only that, but it can damage your fixtures and appliances as well! It’s not something worth risking just for the sake of saving some money on installation. Expensive fixes aside, there are also other potential issues such as noisy pipes and poor flow rate caused by air valving or high water hammering sounds. This could be incredibly annoying if you have it happening regularly at home.While it’s true that the costs associated with installing an expansion tank will come up front, they are well worth it in the long run compared to fixing broken pipes

Why use expansion tank on tankless water heater?

1. Expansion tanks can help to reduce water pressure, which can help to extend the life of a tankless water heater.

2. Expansion tanks can help to reduce the risk of thermal shock, which can damage tankless water heaters.

3. Expansion tanks can help to reduce the risk of water hammer, which can cause damage to the tankless water heater.

4. Expansion tanks can help to reduce the risk of water pressure fluctuations,


If you would like to see more on the products we recommend.