The benefits of an under-sink water heater

Hot water is a vital resource that we all rely on daily, and it’s essential that the water we use is safe and comfortable to enjoy. 

As a homeowner, you might have experienced frustratingly long waits for hot water or inconsistent temperature when using your basin faucets. 

But did you know an under-sink water heater could solve these problems? 

Let’s explore why every homeowner should consider installing one of these compact yet powerful devices. 

Meet under-sink water heaters

If you’re looking for a way to have instant hot water at your sink without taking up too much space, a mini tank under-sink water heater is a great option. 

These compact water heaters can be installed easily and provide a steady hot water supply. 

Under-sink water heaters are available in different sizes, so choosing one appropriate for your needs is important.

How does an under-sink water heater work?

An under-sink mini tank water heater is typically installed in an upright position under the sink or it works as a “sandwich” unit to supply instant hot water to the point of use that is too far from the main water heater.

The water is heated by an electric heating element and stored at a pre-set temperature. 

When the hot water tap is opened, the heated water is pushed out of the tank, and hot water is delivered to the tap.

Benefits of an under-sink mini tank water heater

An under-sink water heater provides many benefits for those looking for an efficient, effective, and safe way to heat water. 

  • These units provide hot water at the point of use, allowing for reduced energy consumption and cost savings. 
  • They also save you time and money by delivering hot water faster than a conventional water heater.
  • Moreover, they are compact and require minimal installation, making them ideal for small spaces.
  • For added safety, they don’t use an open flame and provide freeze protection if connected to power. 

What size under-sink water heater do you need?

The great thing about under-sink water heaters is that they come in various sizes. It’s relatively easy to find a unit that will fit snugly beneath your sink while still delivering plenty of hot water when you need it most. 

Of course, the specific size you’ll need depends on a few factors – such as how long you will have the hot water running and the available open space where the unit will be located. 

Ultimately, determining which size under-sink water heater is right for you requires assessing your household’s unique hot-water needs and selecting accordingly!

Under-sink mini tank water heater regulations

If you are considering installing such a unit for your home, you must know a few under-sink water heater regulations. The USA regulations for under-sink water heaters may vary depending on the state and local codes, but some general guidelines are:

A licensed professional should install all under-sink water heaters. A DIY installation should always adhere to all local building and plumbing codes.

Under-sink water heaters must have a pressure relief valve connected.

Under-sink water heaters must be properly grounded. All installations should always adhere to all local building and plumbing codes.

Maintenance and care tips for your under-sink water heater

Check the anode rod regularly. 

The anode rod helps protect the tank from corrosion, so it’s important to check it periodically and replace it if necessary.

Flush the tank regularly. 

Over time, sediment can build up in the bottom of the tank, so it’s important to flush it out every few months. 

Keep an eye on the temperature. 

Most under-sink mini tank water heaters have adjustable thermostats, so you can ensure the water is always at the perfect temperature for your needs. If you notice the water isn’t as hot as it used to be, or if it starts fluctuating in temperature, call us.

Find your under-sink mini tank water heater solution today

Installation Requirements for the Marey ECO150 Tankless Water Heater

Imagine never having to suffer through a cold shower again!  

Say goodbye to conventional tank units’ pre-heating and stand-by energy consumption with the Marey ECO150

An efficient and eco-friendly hot water solution you won’t want to miss out on. 

But if you’re unsure where to start, don’t worry – we’ve got you covered! 

eco 150

Introduction to Marey ECO150 Tankless Water Heater

The Marey ECO150 tankless water heater is a powerhouse, delivering a whopping 14.5kW of power, making it the perfect fit for up to 2 simultaneous points of use for the central and southern regions of the country. It’s German-designed with a high-quality stainless steel water channel and heating chamber. The ECO line by Marey is the only one in the market with a corrosion-resistant patented heating element that reduces hard water buildup from chlorine and calcium.

This unit provides an impressive temperature increase per GPM, allowing you to run two showers simultaneously, in hot climates. 

To give you an idea of its amazing capabilities, take a look at these flow rates:

  • Flow Rate at 35°F Rise: 3.0 GPM
  • Flow Rate at 45°F Rise: 2.5 GPM
  • Flow Rate at 55°F Rise: 1.7 GPM
  • Flow Rate at 65°F Rise: 1.5 GPM

The Marey ECO150 has been designed with your convenience in mind. Its compact size will help you save space, and you won’t need to worry about high water pressure to activate it. 

What Are the Installation Requirements for the Marey ECO150?

If you’re looking to install the ECO150, you’ll want to ensure you have all the requirements for optimal performance. 

Here’s what you need to know:

  • Ensure you have 208-240 volts available to power the unit. This is a crucial requirement that cannot be overlooked. 
  • You’ll need to dedicate enough space to install a 70 AMP double pole breaker. Before installation, double-check if your service panel can handle the extra load.
  • Ensure that you have a dedicated installation with 6 gauge wires. This will help ensure that the unit runs safely and efficiently. 
  • Your water supply should be free of debris and sediment. If you’re using well water, purge the well water line before connecting it to the unit. It’s a good idea to install a sediment filter. But ensure that installing a filter will not reduce the needed water flow and pressure.
  • Make sure you have enough water flow and pressure to start the unit. The water connections need to be 1/2″ NPT.
  • The maximum distance to the point of use should be no more than 50ft, which may vary depending on your region. 

How to Adjust the Settings for the Marey ECO150?

Adjusting the settings on your Marey ECO 150 water heater is a breeze and can be done with just a few simple steps. 

Here’s what you need to know:

  • After supplying the unit with power, you’ll hear a beep sound, and LED lights will appear for 2 seconds. 
  • To turn the appliance on or off, press the power button. LED lights will show the actual outgoing water temperature when the unit is on. After the appliance stops working, the screen will switch to the screen saver after 5 seconds, and the display screen light will turn off. 
  • Use the up and down arrow buttons to adjust the outlet water temperature. 

If the unit has been paused, you may get a short burst of hot water when you turn it on. 

Always check the hot water with your hand before showering to ensure it’s at a safe temperature.

Upgrade Your Home with the Marey ECO150 Tankless Water Heater

The MAREY ECO series tankless water heaters are raising the bar in the industry by featuring a German-designed patented heating element with a stainless steel water channel. 

One of the standout features of the MAREY ECO series is its SMART technology. The easy-to-use LCD panel allows you to easily manage and adjust the temperature settings and program the desired water temperature. 

Experience the difference that innovative technology and superior-quality components can make in your home.

Keeping your gas tankless water heater unit in top shape with regular maintenance

If you’re the proud owner of a gas tankless water heater unit, you know it can significantly reduce your energy bills and provide an endless hot water supply. 

However, did you also know that regular maintenance is crucial for optimal performance? 

Unfortunately, many homeowners skip this step or delay it until there’s a problem. 

So today, we’ll explain why neglecting your gas tankless water heater unit’s maintenance could lead to costly repairs and jeopardize your safety. 

Why is regular maintenance important for a gas tankless water heater?

First, it helps prevent the build-up of sediment and scale in the unit, which leads to decreased efficiency and performance over time. 

Additionally, regular maintenance can help extend your unit’s lifespan by keeping it in good working condition. 

Finally, by performing regular maintenance on your gas unit, you can ensure it operates safely.

What is regular maintenance of gas units?

To ensure your gas unit is operating properly and efficiently, it is important to maintain it regularly. 

During your monthly inspection, you should check all connections for leaks. For gas connections, the best way to do this is to use a soapy water solution; if bubbles are present, there is a leak. Be sure to tighten or replace any faulty connections. 

You should also inspect the venting system to ensure it is not blocked or obstructed. 

If you live in an area with hard water, flush your gas unit about once every quarter. 

Are there any safety concerns you should know about with a gas tankless water heater?

Yes, it’s important to note that tankless units produce exhaust gases, which can be dangerous if not properly vented. 

Ensure you have your unit installed by a qualified technician and that it is properly ventilated to prevent any hazardous build-up of exhaust gases. 

Additionally, always follow the manufacturer’s instructions when performing any maintenance on your unit.

Overview of venting

The venting installation is responsible for drawing the fumes out of your tankless water heater and exhausting it outside. 

Over time, lint and other debris can build up in the vent, restricting exhaust, and causing your unit to work harder than necessary. 

A clogged duct exhaust can also lead to premature failure of your unit. 

Requirements for proper venting

There are a few key requirements for venting tankless water heaters that must be met to ensure optimal performance and safety. It must be: 

  • made of non-combustible material, such as stainless steel or galvanized steel and aluminium. 
  • sized correctly for the specific model of tankless water heater being used. 
  • installed to avoid coming into contact with exhaust fumes. 
  • properly ventilated and installed according to the owner’s manual, so fumes can escape. 
  • able to handle the high temperatures produced by the tankless water heater.
  • regularly inspected and cleaned to remove any build-up of debris or corrosion.

Tips and advice on maintaining a  gas tankless water heater

  • Inspect the unit and gas lines regularly for leaks. If you notice any leaks, have them repaired immediately by a qualified technician.
  • Check the venting system monthly to ensure it’s clear of obstructions.
  • Keep the area around the unit clean and free of debris. 
  • Check the manufacturer’s instructions for cleaning and maintenance recommendations. 
  • Ensure the unit’s gas pressure is set to the proper level.
  • Test the smoke and carbon monoxide detectors around the unit. 
  • Check for any signs of corrosion and rust and repair as needed. 

Speak to our consultants if you have questions about your gas tankless water heater unit.

Water quality matters: tips for improving the lifespan of your tankless water heater

Did you know that the lifespan of the tankless water heater can be greatly affected by the quality of your home’s water supply?

Over time, mineral buildup and sediment accumulation can lead to corrosion, leaks, and even premature failure of this essential appliance. 

But fear not! 

In this article, we’ll share some tips on how to improve your water quality and extend the life of your tankless water heater. 

What is hard water and scale? 

Water high in mineral content, such as calcium and magnesium, is called hard water.

Signs of poor water quality

  • Water that looks cloudy or discolored
  • Water that smells bad
  • Water that tastes bad
  • Water that leaves deposits on fixtures or appliances

What is hard water on the pH scale?

The pH scale is a measure of how acidic or alkaline water is. The pH scale ranges from 0 to 14, with 7 being the neutral point. Readings below 7 indicate acidity, while readings above 7 indicate alkalinity.

Hard water has a high mineral content, which makes it more alkaline. The higher the mineral content, the higher the pH reading. 

Effects of hard water on a tankless water heater 

Hard water can have several negative effects on tankless water heaters

The most common issue is scale buildup on the heat exchanger’s surfaces. This scale can insulate the heating surfaces, causing them to work less efficiently and eventually fail prematurely, it can damage temperature sensors causing fluctuation in water temperature or production of temperatures too high or too cool.. It can also damage temperature sensors causing fluctuation in water temperature or producing temperatures too high or too cool.

In addition, hard water can also clog pipes and reduce the flow of hot water to your taps. It can also reduce needed water pressure or flow to start the water heater.

What can you do to reduce the hardness of your water?

Install a sediment & hard water filter: This will help remove impurities from your water supply, extending the life of your tankless water heater.

Use soft water: If you have hard water, consider using a water softener to extend the life of your tankless water heater. 

Drain and flush regularly: Draining and flushing your tankless water heater regularly, at least once a year, helps remove the buildup from the heat exchanger, which can lengthen its lifespan.

Flushing tankless water heaters 

Flushing your tankless water heater is a relatively simple process you can do yourself.

You can view the process below:

What you’ll need: 

  • About 3 gallons of distilled (household) white vinegar. 
  • 2 approximate 5-gallon or bigger buckets. 
  • A circulation pump. Although you can flush your tankless water without one, it won’t be as thorough, and you’ll have to take the water heater off the wall.
  • These pumps usually come with their own pipes, but two pieces of garden or washing machine hoses are just as effective.

Flushing steps:

  1. Turn off the power (electricity and gas) to your tankless water heater. 
  2. Close the main shut-off valves on hot and cold-water lines.
  3. Open the flushing valves on both the hot and cold-water lines. 
  4. Open the valves on top of each manifold. Once you open the valves, the water in the tank will run out, so keep your bucket underneath them. 
  5. Clean the prefilter.
    1. It’s normally located outside the unit, above the cold-water valve, but consult your user manual if you are unsure of where it is. 
    2. Simply open it and wash the filter clean with water and maybe a small toothbrush. 
    3. Once clean, put it back.
  6. Connect one of the hoses to each flush valve (one for hot and one for cold). 
  7. Connect the open end of the hose connected to the cold-water flush valve to the pump’s outlet.
  8. Put the pump and the open end of the other hose (hot) in the bucket.
  9. Pour the vinegar into a bucket, ensuring that the pump and the open end of the hot-water line are submerged. 
  10. Plug your pump in to start it up. 
  11. Let the cleaning solution circulate for at least 45 minutes, up to an hour.
  12. Once it’s done, shut the pump off.
  13. Close the valves on top of each manifold, remove the hoses, and close the protective caps tightly on the flushing valves. 
  14. You can clean the prefilter again to ensure no new debris gets stuck.
  15. You can empty your bucket in the garden. 
  16. Open the hot water faucet connected to the tankless hot water heater and let the water run to purge air from lines and fill the heat exchanger.
    1. The hot water won’t run while the main valves are still closed.
  17. Open all the supply valves and turn the gas line or power  back on. 
  18. Turn the tankless water heater back on.
    1. Some air bubbles will come out of the faucet as the tankless water heater runs; that is perfectly normal.
  19. Now you are ready to enjoy clean and clear hot water for another year.

Looking for a tankless water heater that is perfect for your needs and easy to install and maintain? Shop now

The ultimate guide to finding the perfect spot for a tankless water heater in your home.

Are you tired of bulky and space-consuming traditional water heaters taking up precious real estate in your home? 

It’s time to switch to a tankless water heater! 

Not only are tankless systems more energy-efficient, but they also take up significantly less room.

In this post, we’ll share our top tips for finding the perfect place for a tankless water heater and maximizing the space available. 

Get ready to enjoy hot showers without sacrificing valuable square footage!

Benefits of installing a tankless water heater

  • Tankless water heaters can help save space since the unit doesn’t require a storage tank. 
  • Tankless water heaters provide endless hot water, so you’ll never have to worry about running out. 
  • They’re very energy-efficient, saving you money on utility bills. 

Factors to consider before installation

The first factor to consider before installing a tankless water heater is the type of unit you need. Electric and gas models are available, so be sure to choose the one that best fits your needs. 

The next thing to consider is the size of the unit. This will be determined by the amount of hot water you use. Once you have selected the right model and size for your home, it is time to install it.

The location of your tankless water heater and the space available in the room are important. 

Finally, make sure to read the manufacturer’s manual. These manuals are quick reads and will give you all the info you need about your tankless water heater, from warranty to maintenance. 

Factors to consider when choosing a location for your tankless water heater

Here are some things to keep in mind when choosing the location for your tankless water heater:

  • Consider whether you want an indoor or outdoor unit. Outdoor units are typically more expensive, but they offer the advantage of not taking up valuable space inside your home.
  • Another important factor is the climate in your area. If you live in an area with cold winters, it’s important to choose a location that won’t be susceptible to freezing temperatures, which can damage your unit. 
  • Remember to keep your unit away from natural elements, like strong winds and rain.
  • Also, only outdoor units can be placed outside. 
  • Another thing to consider is the proximity of other appliances or fixtures that use hot water. The closer your tankless water heater is to these fixtures, the more efficient it will provide hot water.
  • Finally, you’ll need to consider access to gas or electricity, as tankless water heaters require either one of these utilities to function properly.
The ultimate guide to finding the perfect spot for a tankless water heater in your home
Always refer to the installation manual of the unit you purchased for more details.
The ultimate guide to finding the perfect spot for a tankless water heater in your home 2

Where should you place a tankless water heater in house?

  • It should be placed where it is easily accessible for maintenance and repairs. 
  • It should also be placed where it will not be in the way of foot traffic or other objects in the room.
  • The tankless water heater should be placed against a wall to provide support and stability. 
  • Make sure there is adequate ventilation around the unit. This will help prevent the build-up of fumes and ensure that the unit operates safely.

Example of clearances for a gas unit.

Always refer to the installation manual of the unit you purchased for more details.

What you should not put near a tankless water heater

Flammable materials

Flammable materials should be kept away from tankless water heaters for obvious safety reasons. This includes things like cleaning supplies, paint thinners, and other chemicals. If these materials come into contact with the water heater’s heated elements, they could catch fire and cause serious damage.

In case of gas units, anything that could block ventilation

This includes things like cabinets, shelves, and closets. Blocking the vents prevents the water heater from proper combustion, venting, and heating. This can lead to corrosion and other problems over time.

Anything that could cause corrosion

This includes metal objects or furniture. The moisture in the air around the tankless water heater can cause metals to rust or corrode if left in contact for too long. So, it’s best to keep them out of the way to avoid damage.

Professionals to install the tankless water heater

Although these units are relatively easy to install and set up, contacting a professional can be the best option. This is important, as improper installation can lead to serious problems down the road.

Professionals will be able to install everything according to building codes and ensure all the needed dos and don’ts are followed to a t. 


Installing a tankless water heater in your home can efficiently maximize space and save money on utility bills. 

With the right setup, you can enjoy hot water whenever you need it without cluttering up your home

Looking for the perfect tankless water heater for your home? Look no further than Marey!

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