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Tankless Water Heaters
woman taking hot bath

Tankless Water Heaters

If you’re not aware of what a tankless hot water system can do for you, then you need to speak with the highly trained, tankless water heater experts at Justice Plumbing, the only certified Rinnai Pro‘s in Hood County.

With a tankless water heater, your home’s cold water is heated only when you need it, and it stays hot until you’re done using it. This results in a limitless hot water supply and little to no wasted energy usage. No more worrying about having no hot water for your bath, shower, clothes or dishwashing machines. A tankless hot water system heats the water on demand, right when you need it.

Rinnai tankless hot water heaters

Life is Better With Tankless

Your family can enjoy hot water from anywhere in your home. Two showers running at once? Laundry and dishes at the same time? Not a problem. Experience a limitless supply of uninterrupted hot water. Rinnai tankless water heaters use up to 40% less energy than a traditional tank – and last twice as long!

More Space for You

Only the size of a small suitcase, our wall-mounted models can be installed in compact spaces in both indoor and outdoor locations. They take up less space for heating, giving you back more space for living.


Never Run Out of Hot Water


Better Value Than a Tank


Save Valuable Space


Technology to Improve Your Lifestyle


Family-friendly, earth-friendly


Reliability You Can Count On


Save up to 40 percent on energy bills*


No pilot light and no storage tank to heat and reheat water



The Heart of Your Home

Think of plumbing as your home’s vital arteries, supplying critical fluid—in this case, hot water—to critical areas at critical times. At the center of this system is your hot water heater. If it fails to perform as needed, everything it supports—showering, bathing, washing dishes and clothes—will fail too.

Frequently Asked Questions

What size tankless water heater do I need?

There are many factors that impact the size of tankless water heater you should choose, including how many people are in your home or office and how many facilities (bathrooms, washrooms, laundry rooms or kitchens) the unit will service. To simplify the process, we have a handy three-step formula for choosing what capacity of Rinnai tankless water heater will work best for your needs.

  1. Step 1: Identify your required flow rate in gallons per minute (GPM)
  2. Step 2: Identify the groundwater temperature in your region or state
  3. Step 3: Calculate your required minimum temperature rise

We would love to help you identify the perfect tankless water heater. Let a licensed and trained professional guide you from the beginning, contact us today!

How long does a tankless water heater last?
The life expectancy (or useful lifespan) of a Rinnai tankless water heater is up to 20 years. Actual life is impacted by water quality, usage and proper maintenance. For comparison, a tankless water heater lasts about twice as long as a tank water heater, making them a better value in the long run.
Why does a tankless water heater cost more than a tank water heater?
A traditional tank water heater is the most common type in the United States. These tank heaters use older, less efficient technology to gradually heat cold water at the bottom of the large tank. That means that the water in the tank is constantly being heated, waiting for the moment when you need it. Rather than storing water, tankless water heaters use heating coils to heat on demand as you need it. Tankless water heaters are more energy efficient, use less physical space and provide technology not typically available with tank water systems.
What type of regular maintenance does a Tankless Water Heater require?

There are two types of periodic maintenance that your service technician should perform to keep your tankless water heater in top shape. It’s important to note, the time in between necessary maintenance will depend on the water quality in your home.

  1. The in-line screen filter should be checked periodically for debris and cleaned.
  2. The unit should be flushed annually to keep it free of scale and lime, which can shorten the water heater’s lifespan over time.

Scheduling a plumber to perform routine water heater maintenance will allow your properly maintained equipment to function more efficiently, last longer and save you money! Protect your home & your wallet with The Justice Club maintenance membership. Not sure which plumbing protection plan is right for you? Call Justice Plumbing today (817) 579-9779 and let us guide you in the right direction.

Can I still get hot water if the power is out?
If you experience a power outage, your Rinnai Tankless Water Heater will not operate. However, the Hugo X-1 Battery Backup, designed specifically to run your Rinnai tankless unit without power for multiple days, will also keep your computer or cellphone powered until power is restored. The Hugo X-1 is available now for order from your local Rinnai Ace Dealer.
How does a tankless water heater work?
Rather than storing water, tankless water heaters use heating coils to warm the water as you need it. That’s why tankless water heaters are often called “on-demand water heaters.” When you open a tap or start an appliance such as a dishwasher, the tankless water heater recognizes the need and begins to deliver hot water when and where you need it. This is much more energy efficient for hot water heating versus traditional tank water heaters, which constantly heat water, even when none is needed.
How much does it cost to install a tankless water heater?
Installing a tankless water heater may be more expensive than installing a traditional water heater tank because certain homes may require changes to some of the HVAC ducts or installing certain necessary plumbing pipes. The cost varies based on a number of factors, including where you live, how your home is constructed, and which Rinnai tankless water heater you select. For an accurate price, request a free quote today!
What are the advantages and disadvantages of a tankless water heater?


  • A tankless water heater saves you money over time, thanks to far superior energy efficiency.
  • They have a significantly longer useful lifespan than tank water heaters, lasting almost twice as long in some cases.
  • They require significantly less storage space than a storage tank water heater.
  • You’ll have unlimited hot water whenever you need it. The hot water is available in seconds instead of the minutes it typically takes for a tank heater.
  • You will have more than enough hot water for multiple showers and appliances to run simultaneously.


  • Tankless water heaters generally have a higher purchase cost, when compared with traditional storage tank water heaters.
  • Installation can be more expensive, based on how much (if any) retrofitting is needed.
  • You could be “output challenged” if maximum usage was calculated incorrectly. Fortunately, we have tools to help you choose the right Rinnai unit for you, avoiding this issue.
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