How To Maintain Tankless Water Heater

How to Maintain a Tankless Water Heater

Article in PDF format Article in PDF format In the course of time, minerals can accumulate in a tankless water heater’s heating chamber, where they can build up and damage the walls of the tank’s heating chamber. You must flush and remove the mineral deposits from your tankless water heater’s tank at least once every year in order to keep it in proper working order and cleanliness. Continue reading to find out how to properly maintain your tankless water heater in order to guarantee that it operates at peak performance and energy efficiency.

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  1. 1 Turn off the electricity to your tankless water heater’s power source. 2
  • This can be accomplished by shutting down the main gas line or turning off the circuit breaker for electrical appliances.
  • Secondly, shut down and switch off the three water valves connected to your tankless water heater.
  • While cleaning, this approach will prevent cold water from flowing into the water heater and hot water from flowing out during the cleaning process
  • However, it is not required. The water valves are comprised of three parts: a cold water valve that is often blue in color, a hot water valve that is typically red in color, and a third main valve that brings water into your home.
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  • s3 Take care not to damage the purge port valve caps when you remove them from the purge valves on each of the cold and hot water valves
  • The purge valves are distinguished by their little handles that mimic the letter “T.” In order to alleviate any pressure that has built up inside the valves, this technique must be performed in order to prevent excessive hot water from flying out and coming into touch with your skin. Due to the possibility of pressure build-up when removing the purge port valve covers, it is critical to ensure that the hot water valve is completely and correctly switched off for safety reasons. Using gentle pressure, gently tighten each cap to ensure the rubber washer sealing discs remain in place, which are required for your valves to operate correctly.
  • Fourth, connect your hosing lines to each of the three valves.
  • If the manufacturer of your tankless water heater did not supply you with hosing lines, you may get them from any retail outlet that specializes in home repair or water heaters. If you have any questions, contact the manufacturer of your tankless water heater. There must be enough length in the hosing lines to allow them to reach between the water heater and your bucket
  • It is possible that you will need to reference your tankless water heater’s owner’s handbook or contact the manufacturer directly for specific instructions on how to do this operation. Depending on your situation, you may be required to utilize a sump pump and attach hoses to the tankless water heater’s cold and hot water valves in order to discharge and flush the water from the tankless water heater.
  • Opening the purge port valves by twisting them in the opposite direction of the cold and hot valves is a good way to start the process. 6 Instead of using chemical solutions to clean your tankless water heater, have 2.5 gallons (9.46 liters) of undiluted white vinegar on hand at all times.
  • In addition, because your tankless water heater is most likely the source of all of your drinking and bathing water, employing chemical cleaning solutions might have a negative impact on the quality of your water.
  • 7 Follow the manufacturer’s instructions for the flushing and draining of your tankless water heater to the letter to complete the operation.
  • 8After the flushing operation has been finished, close the purge port valves by twisting the “T”-shaped handles. Remove the hosing lines from each water valve by disconnecting and removing them. Tenth, attach the purge port valve covers to the purge valves
  • And eleventh
  • Make sure to tighten the caps completely and firmly without damaging the rubber sealing discs that are placed within the caps.
  • For specific information on how to properly re-start your tankless water heater, consult the manufacturer’s handbook.
  • If all that is required is for you to rotate and open the cold and hot water valves so that they are parallel to the position of the main valve that leads into the home, you have completed the operation.
  • Alternatively, slowly turn on the hot water tap in your sink to allow air to travel through the pipe.
  • Continue to run the water until it is running consistently and there is no air escaping from it
  • It is possible that this operation will take up to 2 or 3 minutes.

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  • Question What should I do if there is a leak in the plumbing and steam is escaping while the hot water is being used? Your heat exchanger has developed a crack and will require replacement. You can purchase only that component or you can replace the entire tankless heater. The cost of replacing only a portion of the unit is less expensive (in terms of components), but I chose to repair the entire unit since water had seeped into the electronics, and who knows when that might cause another failure
  • QuestionDoes this need to be done even if I have a water softener? Yes, since it’s critical to keep a tankless water heater in good working order. The heating components get very hot, causing calcium and other deposits to bake onto the heating units in a short period of time. Even if the water is from a clean municipal source, it should be filtered. Failure to keep a tankless water heater in good working order

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  • Make sure you have all of the tools and equipment necessary to flush and drain your tankless water heater by consulting the manufacturer’s instructions for your particular model of tankless water heater.

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  • If you have used hot water just before doing this process, proceed with caution since the water may be very hot while manipulating the purge port valves.

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Things You’ll Need

  • The following items are required: a sump pump or a utility pump
  • 2.5 gallons (9.46 liters) undiluted white vinegar
  • A 5-gallon (18.92 liter) bucket
  • Three hosing lines (the number of lines may vary depending on the manufacturer)

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An electric tankless water heater is one of the most energy-efficient and cost-effective ways to provide hot water for your house. Because it delivers hot water on demand, a tankless water heater system takes up less space and consumes less energy than a standard tank-style water heater system. The installation of a tankless water heater is a significant investment in your house, and they may last for up to 20 years if they are properly maintained. Tankless water heaters, like any other item in your house, require regular maintenance to ensure that they continue to function properly.

Turn off the energy source

Whenever you are doing inspection or maintenance on your tankless water heater, the very first thing you must do is switch off the electricity to the unit. The majority of tankless water heaters are powered by gas or electricity, while others are powered by kerosene or even propane. The maintenance operation is made safer by turning off the main gas outlet or the main power source at the circuit breaker before beginning.

Close all the water valves

To prevent water from entering the tankless water heater, you must close the water valves on the water supply lines. This also prevents any warm water from escaping the cleaning system during the cleaning procedure itself. To turn off the water, there are normally three color-coded water valves to use. Cold water is controlled by a blue valve, hot water is controlled by a red valve, and the third valve regulates the flow of water between the main water supply and your residence. Before commencing the maintenance procedure, be sure that all three of these valves are closed.

Disengage the purge port valve caps

Purge valves are included into your tankless water heater to aid in the control of pressure buildup. Each has a little handle that is shaped like the letter “T” on the end. When you remove the purge port valve covers, be careful not to overdo it since this can cause pressure to build up in the purge valves. This also stops hot water from spouting out, which may cause you to burn yourself.

Attach hosing line to each valve

In some cases, hosing lines may have been included with your tankless water heater; in others, you may need to purchase them from a home improvement store. Alternatively, the hosing line can be used to connect the water heater to a flushing bucket or other similar device. It is possible that you may need to connect the hoses to a sump pump.

This enables the hot and cold water valves to flush through and release water from the tankless water heater unit while the device is in use. It may be beneficial to refer to the handbook that came with your particular tankless water heater model for more detailed instructions.

Open the port valves

Twist the port valves until they are perpendicular to the water valves, then release the twisting force.

Add descaling solution or white vinegar to the unit

To clean your tankless water heater, you can use a normal descaling solution or roughly 2.5 gallons of pure white vinegar. Many households prefer vinegar over other cleaning products since it is typically believed to be safer.

Flush and drain the tankless water heater

You may next clean and drain your water heater using the directions in your owner’s handbook to ensure that everything is in working order. The water heater should be flushed and allowed to drain to the bucket for approximately 45 minutes to ensure complete cleaning. After the flushing has been done, you may close the port valves and then disconnect the hosing line from the water valves to complete the process. After that, you may gently reseal the purge valves with the port caps that came with them.

Restart the tankless water heater

You can restart your water heater unit by following the directions in your owner’s handbook after you have completed the cleaning procedure. This will also entail re-opening the water valves on the property. Air will travel through the water pipes as a result of this action. You may turn on your faucets to remove any air that has built up in the line and restore appropriate hot water circulation. This process will take roughly two to three minutes to complete. Cleaning a tankless water heater guarantees that it continues to operate at its highest possible energy efficiency, resulting in more efficient and effective outcomes.

A skilled plumber can perform efficient maintenance that is specifically matched to your heater type, allowing you to enjoy on-demand hot water without the hassle of doing it yourself.

How to Maintain a Tankless Water Heater

Previous PostNext PostTankless water heaters are normally designed to give an unlimited supply of hot water, however this is not always the case if proper maintenance is not performed. Ensure that your tankless hot water heater is in good working order and that your investment is protected! To cleanse your tankless water heater and remove lime scale, follow the instructions below. Descaling is another term used to describe the process of flushing the water heater. It is recommended that you do this vital element of tankless water heater maintenance every six months to two years, depending on the hardness of the water you use.

It is critical to remove this in order to avoid further damage to the unit.

Supplies to Flush a Tankless Water Heater

  • A submersible utility pump is another name for this type of pump. A tankless water heater may be descaled with as little as 1/6 horsepower. If you’re working with a pump that’s more powerful than 1/4 horsepower, proceed with caution.
  • The following items are required: three gallons of white distilled vinegar
  • One five-gallon bucket Two lengths of hose (about 2 x 4 feet) with the appropriate fittings
  • These should have come with your equipment as a standard feature. Alternatively, you may get them from your local hardware shop. They have the appearance of washing machine water supply hoses.

How to Flush a Tankless Water Heater

  • Turn off the gas line or, if it’s electric, trip the circuit breaker to prevent further damage. The access panel or cover, which is normally kept in place by a few tiny screws or tabs, should be removed
  • 2. Immediately shut off the water supply and open the pressure release valve.
  1. Connect a hose to the input side of the hot water heater, which is the point at which cold water enters the water distribution system. Alternatively, you may need to disconnect the current cold-water supply pipe, which may need the installation of a separate hose connection. Connect the other end of this pipe to your little sump pump and you’re done. Pour vinegar into a 5-gallon bucket and submerge the pump in it until it’s completely covered with white distilled vinegar. The vinegar that enters the water heater will leave back into the bucket before it is recirculated, since you are constructing a closed-loop system with this method. In the event that you’re using the current hose’s connection rather than a separate connection for flushing, make sure to open the valve before proceeding
  2. Or Once the hoses are properly connected, start the engine.
See also:  How To Replace Ge Refrigerator Water Filter

How to Clean the Water Filter in Your Tankless Water Heater

Some tankless water heaters are equipped with a sediment filter, which helps to prevent bigger material from reaching the heating unit. They may be cleaned under running water or soaked in white vinegar until they are completely clear of debris, and they are normally useable throughout the life of the tankless water heater.

The placement of this filter varies depending on the make and type of your water heater; if you are unable to locate it, refer to the manufacturer’s instructions.

Professional Tankless Water Heater Maintenance

Tankless hot water heaters have a long lifespan provided they are maintained appropriately. It is critical to do routine maintenance on them in order to keep them working smoothly. In the event that you are too busy or unsure how to flush your tankless water heater, Mr. Rooter ®Plumbing is available to assist you. Give us a call at (855) 982-2028 or fill out our online appointment request form to schedule water heater servicing. Those who live in hard water areas should consider installing a water softener to ensure that all of their plumbing appliances last as long as possible.

It’s possible that when working on your tankless water heater, you’ll notice your HVAC system in close proximity.

Schedule an appointment with your local AireServ to get your air ducts cleaned now.

Tankless Water Heater Maintenance

Tankless hot water heaters are ideal for consumers who wish to save on energy costs while still having access to hot water on demand. The fact that they are small in size means that they are soon becoming the most popular choice for water heaters in both residential and commercial settings. If you have a tankless hot water heater, it is critical that you do regular water heater maintenance on it. Maintaining your water heater on a regular basis might extend its lifespan to more than twenty years.

Tankless Hot Water Heater Maintenance should be performed twice a year if you live in a region with hard water or if you have the water temperature set to a high setting on your tankless water heater.

Flushing the System

At the very least, the hot water heater should be cleansed once a year. Minerals accumulate within the water heater throughout the course of the year. If you have a hard water source, the scale may accumulate more quickly. Mineral buildups in your unit’s heat exchanger might cause it to malfunction. Because of the potential failure of the tank’s efficiency, you may find yourself with an increased energy cost each month. By failing to clean your tankless hot water heater on a regular basis, you might significantly reduce its life expectancy.

Flushing will eliminate all of the mineral build-up that has accumulated.

You will succeed.

Cleaning the Air Filter

An air filter is installed in your tankless water heater, and it will need to be cleaned on a regular basis. Remove the filter from the water heater and clean it well.

After that, you’ll want to scrub it down with a soft brush and a soap and water solution to clean it. Make certain that it is well cleaned in order to maintain optimal ventilation. After thoroughly rinsing it, allow it to dry fully before reinstalling it in the water heater.

Cleaning the Water Filter

It is critical that you do not overlook the water filter while doing water heater maintenance on your unit. The majority of tankless water heaters are equipped with a screen that helps to collect any silt that may enter the system. You will need to remove these particles from your water heater on a regular basis in order to keep it operating at optimal performance. If sediment builds up in your hot water heater, it can significantly impair its ability to perform properly. The hot water heater’s water supply must be shut down before you can remove the filter from the system.

It is possible to clean it with warm soapy water or by wiping it down with a towel If you are unable to locate your water filter, consult your user handbook to identify where it is located.

Cleaning the Tank

Occasionally wiping down the outside of the tank is advisable to ensure that no dust or dirt accumulates on it. Make sure to turn off the electricity and water supplies before you begin. Using a damp cloth, wipe off the tank and the surrounding area. It is possible for a buildup of dust and debris to get inside the water heater, which can create problems. Tankless Water Heater Maintenance should be performed on a regular basis to guarantee that your unit is operating as it should. When performing heater maintenance, make sure to inspect all of the other components of the heater.

Look for any leaks, corrosion, or anything else that appears to be wrong.

9 Helpful Tips for Tankless Water Heater Cleaning and Maintanence

Previous PostNext PostHot water at your fingertips! One of the advantages of installing a tankless water heater is that it saves space. Another advantage of a tank water heater is the potential for energy savings of up to 50% over a normal tank water heater. In the same way that any other household appliance performs more effectively with proper maintenance, your water heater will work more efficiently with proper care as well. The first step is to do routine maintenance! Read today’s post for six suggestions on how to clean a tankless water heater and perform other essential maintenance activities.

You might even be able to extend its usable life!

1. How Often Should You Clean a Water Heater?

Whatever your experience level with tankless water heaters is, whether you’re a new convert or have had your unit for several years, you’ve probably had queries about how often you should clean the unit. The majority of water heater manufacturers recommend cleaning your water heater once a year. To be sure, the frequency may vary depending on your location and the quality of your drinking water. In the case of hard water, you may need to cleanse your water heater more frequently than in other circumstances.

Residents in all cities are provided with monthly or quarterly updates on the state of municipal water systems by city staff.

Your dependable plumbing professional can also assist you in determining how frequently you should flush out your water heater. As far as cleaning the outside of the unit is concerned, we’ll handle that.

2. Taking Care of Exterior Maintenance

The majority of homeowners take pleasure in performing at least a few house maintenance tasks themselves. In order to ease into water heater maintenance if you are new to the game, taking care of the outside of your water heater is a good first step. Exterior upkeep does not necessitate the expenditure of a significant amount of time or resources. Begin by wiping down the cover of the book. Using a non-abrasive cleanser and a soft cloth to clean the device helps to maintain it clear of dust and avoid the formation of rust.

Checking pipes during cold weather is important for our northern neighbors to avoid frozen pipes.

Finally, if your tankless water heater is equipped with a pressure release valve, you should make sure it is working properly.

3. Why You Should Flush

Water heaters, like other appliances, accumulate limescale deposits over time. Failure to descale conventional tank models can result in an explosion in some instances. Tankless water heaters will not explode, but if the sediment is not flushed out of the unit, it may cause the heat exchanger to work harder than it needs to, increasing the risk of failure. The ability to keep sediment washed out not only allows the water heater to operate more effectively, but it can also assist prevent additional issues.

Consider an isolation valve to be similar to the shut-off valve on a normal tank water heater in terms of function.

It is possible that your water heater does not have an isolation valve.

4. What Supplies Do You Need to Clean the Water Heater?

We’ve covered safety; now it’s time to speak about the supplies you’ll need to flush the unit. These are the materials you’ll need: While you may purchase each component separately, a flush kit contains everything you need in one convenient package. Alternatively, you may use 4 gallons of undiluted white vinegar instead of the descaling solution included in the flushing package.

5. How to Descale a Tankless Water Heater

We’re presenting the simple methods for descaling a water heater since it’s one of the maintenance activities that many homeowners can complete with little or no help from a professional. The first step is to turn off the power that is feeding your water heater. Locate and close the gas isolation valve if one exists. Shut off the hot and cold water shut-off valves while you’re working on the unit to prevent water from entering the unit. If your machine is equipped with a pressure relief valve, carefully open it to relieve any built-up pressure.

Next, put the submersible pump in the bucket you just made. The cold water line should be connected to the pump, and one end of the hot water hose should be placed in the bucket. You have two options: either pour four gallons of vinegar or pour four gallons of water.

6. Final Steps for Tankless Water Heater Cleaning

Closing the cold water service port and opening the cold water shut-off valve are the next tasks you need to do. This step removes any vinegar that may have remained. Following that, you’ll close the valve and allow the water to drain completely. It is now necessary to shut the hot water port. Finally, if there is a cold water input filter, make sure to remove it as well as the hot water in-line filter before continuing. Flush both of them in the sink to ensure that any remaining sediment is removed.

Keep in mind that, while it might be a fun DIY project, you may feel more comfortable having a professional plumber complete the task.

Need to Schedule Tankless Water Heater Maintenance?

Maintenance, including tankless water heater cleaning, should be performed at least once a year to ensure that everything is running well. You may need to perform additional duties, such as cleaning off the unit’s outside, on a more frequent basis, especially if the location where the water heater is installed receives a lot of dust. While you can perform some simple maintenance on your own, why not enlist the assistance of our team? For both tankless and traditional tank water heaters, we are delighted to plan periodic descaling and yearly service appointments with you.

Previous PostNext Post Previous Post

How to Flush a Tankless Water Heater (Step-by-Step Procedure)

Please keep in mind that this content may contain affiliate links. This means that, at no additional cost to you, we may gain a small profit on purchases made via our links. Knowing how to clean a tankless water heatercan assist you in getting the most out of your investment in terms of efficiency and longevity. Consider the following steps in detail, as well as some helpful tools and crucial considerations.

The Importance of Flushing Tankless Models

Tankless water heaters are less expensive and more energy efficient to operate when compared to standard water heaters. They also demand significantly less maintenance and operating area. That is why it is essential to understand first why and when it is necessary, followed by how to flush a tankless water heater, whether it is gas or electric. Examine how the naturally existing sediment in your water impacts the heater, as well as how to make flushing more convenient and safer.

Tankless Water Heaters and Scale Buildup

Anyone who has had a conventional water tank is aware with the necessity of flushing the tank on a regular basis in order to remove sediment. Tankless heaters are not an exception to this rule. Hard water includes minerals that can cause lime scale to build up on the surface of the water. An explosion from the accumulation is less likely with a tankless heater than with a tank model, but it can still result in some expensive complications with a tankless heater. The heat exchanger is particularly susceptible to scale buildup.

This can result in a considerable reduction in the lifespan of this component, as well as a large rise in your electricity expenditures over time. To make matters worse, most warranties do not cover the effects of lime accumulation.

How Often Should You Flush a Tankless Water Heater?

It is recommended that your tankless water heater be cleansed once a year to keep it operating at peak performance. However, the hardness of your water plays a role in this, and you may find that flushing twice or three times a year is preferable if your home’s water is of very low quality in this regard. To a certain extent, a sediment trap or a water softener can help with hard water.

Isolation Valves

It is critical that we explain isolation valves before proceeding with the rest of the processes. As the name implies, an isolation valve allows you to isolate (isolate) a segment of your pipeline’s liquid or gas supply without having to shut down the entire supply line (as would otherwise be the case). Essentially, the word is equivalent with the term “shut-off valve.” From your stove to your toilet, a wide range of objects in your home are equipped with some type of isolation valve for maintenance or emergency purposes, depending on the item.

See also:  How To Thaw Tankless Water Heater

Depending on the manufacturer and whether or not you had a specialist do the installation, there are several options.

Using Pumps and Flush Kits

A submersible pump is one of your greatest friends when it comes to flushing a tankless water heater. Instead of enormous volumes of water to sweep up and remove the sediment from a tank heater, a high-quality pump such as the91250 from Superior Pump can save you hours if not days of manual flushing and will save you money in the long run. Flushing will necessitate the use of a large bucket to contain the pump, since there is no easy drainage option available, as there is with a typical tank model, necessitating the use of a submersible model pump.

These kits often include everything you’ll need, including a pump, bucket, descaler, and hoses, among other things.

How to Flush a Gas Tankless Water Heater

Check the owner’s handbook for your water heater, since it may provide specific instructions on how to flush and descale the unit. Rinnai, Rheem, and Noritz are the three most popular manufacturers of gas tankless versions. For your convenience, we’ve included particular guidelines for each of the brands listed below:

  • Procedures for flushing a Rinnai tankless water heater, a Rheem tankless water heater, and a Notritz tankless water heater are all available online.

No matter what type of gas tankless water heater you have, there are a few steps in the flushing process that must be completed in the proper order, but they are all rather straightforward to complete.

Phase 1: Preparation

  1. Disconnect the electrical power source that is feeding the heater. Remove the access panel and check the terminal with a non-contact voltage tester to ensure that there is no longer any power coming through it. Discover where the gas isolation valve is located and close it. To prevent any water from entering the unit while you are working, locate the hot and cold shut-off valves and close them accordingly: To release any pressure, locate the hot water pressure relief valve, which should be located somewhere along the hot water line. Take cautious, because the hot water will be quite hot
  2. The service port for cold water and the service port for hot water will be separate. Hoses should be connected to both of these ports. Fill a five-gallon bucket halfway with water and submerge your submersible pump. The cold water pipe should be connected to your pump. Place the free on the table.

Phase 2: Flushing

  1. Make sure that the hot and cold service ports are open and that the pump is running. Make sure the vinegar is allowed to flow through the heater for at least one hour (longer if the pump runs at less than four gallons per minute). As a result of this, the scale is broken down and the silt is flushed away. Turn off the pump and empty the vinegar into a trash can. Close the cold water service port and disconnect the hose that is connected to it. Open the cold water shutoff valve to let any residual vinegar to be flushed out through the second hose into your bucket for around ten minutes. Close the cold water shut-off valve on your faucet. Allow the water to drain completely before disconnecting the second hose. Close the hot water service port on the boiler. Remove the cold water input filter and, if applicable, the hot water in-line filter from the system.

Phase 3: Cleanup

  1. Reinstall the filter(s) in a secure manner, and then turn off the hot and cold water valves
  2. Replace the access panel
  3. Turn on the gas shutoff valve
  4. And remove the access panel. The electrical supply should be reconnected.

How to Flush an Electric Tankless Water Heater

Flushing out an electric tankless water heater is a little different than cleaning out a gas tankless water heater, and some disassembly may be necessary.

Generally speaking, Navien models are easier to understand, however some Takagi models require additional steps in order to properly place the water control valve.

  • Technique for flushing a Navien tankless water heater
  • Procedure for flushing a Takagi tankless water heater

Descaling an electric model is similar to descaling a gas model in that it may be divided into three stages.

Phase 1: Preparation

  1. Switching off the electrical power at the circuit breaker
  2. Close the cold water shut-off valve on your faucet. Open your taps to let any water that has accumulated in the heater to drain
  3. Close the shut-off valve for the hot water supply. Remove the access panel and check the terminal with a non-contact voltage tester to ensure that there is no longer any power coming through it. Disconnect the wires from the heating elements by removing the screws that hold them in place. Extraction of the heating element is accomplished by loosening the hexagonal brass top of the heating element in a counterclockwise manner
  4. Make a visual inspection of the heating components for evidence of damage. A broken element should be replaced as soon as possible. Storage of the heating elements in the cooper chambers of the heater to allow for cleaning of the heating elements

Phase 2: Flushing

  1. Fill the cooper chambers with virgin food-grade white vinegar that has not been diluted
  2. Pour vinegar into the chamber and allow it to rest for 90 minutes to two hours. Using this method, you may break up any scales on the components. Remove the vinegar from the mixture. Replace the heating elements and reattach the cables as necessary. Open the cold water shut-off valve and let the tank to fill up with cold water
  3. Observe the tank for any evidence of leakage (the paper towel test is quite effective in this situation)
  4. To turn off the hot water, turn the shutoff valve. Fill the sink with warm water from various hot water taps and let the water run for about five minutes to flush out the vinegar and remove any air pockets from the line

Phase 3: Cleanup

  1. Turn off all hot water faucets in your home. Close the cold water shut-off valve on your faucet. Clean any dirt from the cold water input filter by flushing the filter under a cold water faucet. Replace the filter in a secure manner. Power should be restored at the breaker once you close the access panel

Do Tankless Water Heaters Need Maintenance?

Please keep in mind that this content may contain affiliate links. This means that, at no additional cost to you, we may gain a small profit on purchases made via our links. It is necessary to repair all mechanical devices and equipment on a regular basis in order to ensure maximum durability and efficiency, and a tankless water heater is no exception. Being aware of why it’s vital and what has to be done might assist you in making preparations for this procedure.

Common Issues With Tankless Water Heaters

It is possible to reduce downtime due to repair concerns by keeping your tankless hot water heater in good condition. Moreover, it has the ability to increase the longevity of your unit and boost energy efficiency over the course of several months or years. Water hardness is one of the most major elements that might cause system failure and require repairs, although regular system maintenance can mitigate the impact of hard water on the system. Hard water contains a high concentration of minerals, and these minerals can cause scaling and other problems inside your system.

Consider that every tap water that passes through your system contains at the very least minimal amounts of minerals that can accumulate over time.

How Tankless Water Heater Maintenance Helps

When it comes to dealing with maintenance, you have two options: schedule service or do it yourself. Generally speaking, the most common form of maintenance service required for most of these systems related to cleaning the system in a variety of ways. Minerals that have caked onto the components of the unit must be removed by descaling procedures. Installing an inline filter is a wise investment if you want to significantly decrease accumulation. A general cleaning, on the other hand, is good.

Additionally, by following these instructions, you may be able to prevent needless wear and strain on your unit, which may allow it to last longer.

Descaling Process

The need for descaling may arise from time to time if you reside in a location where the water is hard. Descaling is the procedure that entails eliminating the muck that has built within your system over time. Your system might become clogged with minerals from the water, causing a thick build-up of sediment. The descaling procedure is quite similar to the flushing and cleaning procedure described below. a. Running a substantial volume of water vinegar through the tank is required, while this is not mandatory.

Keep in mind that, after using vinegar for demineralization, you may need to rinse or flush the system for up to 45 minutes in order to completely eliminate all vinegar and debris from the unit.

Instructions on how to descale a tankless water heater from the most common manufacturers are included below:

  • Rheem
  • Rinnai
  • Navien
  • Noritz (which generally corrects Noritz fault codes 16 and 20)

Here’s a good video that demonstrates the procedure:

Flushing the System

Regardless of the amount of hardness in your water, all tanks should be cleaned on a regular basis. The procedure is a little more difficult than flushing a storage tank water heater, but it is still rather simple. This treatment is often performed every 6 to 12 months, with the frequency ranging between 6 and 12 months in many circumstances. It is necessary to follow the manufacturer’s directions during the flushing procedure. Related: How to Flush a Tankless Water Heater (with Pictures) (Step-by-Step) A typical procedure involves turning off the water heater’s power and water supply, connecting a short hose to each of its isolation valves, connecting a small pump to the end of its cold water hose, and then placing the hot water hose and circulation pumpinlet hose into an empty 5-gallon bucket of water.

When to Perform or Schedule Service

Now that you understand the necessity of maintaining your tankless water heater as well as the actions that must be taken, you must select how frequently you will conduct the maintenance. More than that, you must determine if you will do it yourself or hire a professional to do it for you. While these fundamental procedures appear to be straightforward to execute, you must first grasp which valves control which components of the machine before you can begin playing with it. Furthermore, you want to be certain that your efforts are effective in cleaning the system.

If you have a tankless water heater, the plumber may notify you of the suggested frequency for performing maintenance services on it in the future.

How do I flush clean my Rinnai tankless water heater? (R)

It is possible for a tankless water heater to collect mineral build-up over time, which can corrode the walls of the heating chamber within the tank. For regular maintenance and cleaning of your tankless water heater, it is necessary to rinse those mineral deposits out at least once a year using a hose. Follow this straightforward procedure to guarantee that your tankless water heater performs and operates at peak efficiency. Please take the time to go through all of the directions before starting, as you’ll want to ensure that you have all of the essential items on hand for the procedure.

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  • During the cleaning procedure, this stops cold water from entering the water heater and hot water from exiting the water heater. The water valves are comprised of three parts: a cold water valve (which is colored blue), a hot water valve (which is colored red), and a main valve, which is responsible for bringing water into your home.

4. Remove the purge port valve caps from the purge valves situated on each of the cold and hot water valves one at a time, taking care not to damage them.

  • The purge valves are distinguished by their little handles that mimic the letter “T.” In order to alleviate any pressure that has built up inside the valves and to avoid excessive hot water from pouring out during the cleaning process, this step must be carried out. Because there may be pressure when removing the purge port valve covers, it is critical to double-check that the hot water valve has been properly switched off for your safety. Make sure to handle each cap with care to ensure that the rubber sealing discs remain in place. These are required in order for your valves to operate correctly.

5. Connect a hosing line to each of the three valves in the system.

  • Tankless water heater hosing lines are available at any home improvement store that carries water heaters if the manufacturer did not include them with your tankless water heater. There must be adequate length between the water heater and the bucket for the hosing lines to be effective. Please refer to the tankless water heater manufacturer’s instruction manual, or contact the manufacturer directly if you require specific instructions on how to do this step. In certain situations, you may be required to utilize a sump pump and connect hoses in order to discharge and flush water from the tankless water heater’s cold and hot water valves during this operation.

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Twist the purge port valves so that they are perpendicular to the positions of the cold and hot valves, and then close them. 7. To clean your tankless water heater, fill a 4-gallon (15.1-liter) bucket halfway with undiluted white vinegar. Never apply any type of chemical solution on your skin.

  • Given that the majority of your home’s drinking and bathing water is most likely routed through your tankless water heater, employing chemical cleaning solutions might be highly hazardous to your health.
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8. To complete the flushing and draining operation, according to the directions provided in your manufacturer’s handbook. 9: When the flushing operation is finished, shut the purge port valves by twisting the T-shaped handles. 10. Disconnect and remove the hosing wires from each of the valves in the sequence listed. 11. Attach the purge port valve caps to the purge valves using the hose clamps.

  • Tighten the caps all the way down and securely. Take care not to overtighten or damage the rubber sealing discs that are contained within the caps, though.

12. Refer to your water heater’s owner’s handbook for specific advice on how to properly restart the unit.

  • If this is the case, you may need to rotate and open the cold and hot water valves so that they are parallel to one other and the main valve’s position.

Pick a sink tap within the house and turn on the hot water gently, allowing enough time for air to travel through the pipe.

  • Make sure to keep the water running until it flows consistently and there is no air escaping (you may recognize this by a slight sputtering sound). It might take up to 2 or 3 minutes for all of the air pockets to be expelled from the system.

Easy Maintenance Tips for Tankless Water Heaters w/Photos

A little ‘how-to’ information may go a long way toward ensuring that your tankless water heaters operate at peak efficiency. As a result, not only will you save money on plumbing expenses, but you will also extend the life of your tankless water heater. You may be asking yourself right now, ‘what are some tips for keeping my tankless water heater in good working order?’ Is it necessary to do periodic maintenance on tankless water heaters? Tankless water heaters, like any other type of water heater, require periodic maintenance.

Because of hard water or the amount of hot water your household consumes, you should anticipate to do this once a year at the most.

Do You Need to Flush Your Tankless Water Heater?

The majority of people are aware that they must flush a tank-style water heater. Most people, on the other hand, are unaware that they should also flush their tankless water heater. Yes, tankless water heaters do require flushing on a regular basis. It is necessary to flush the tankless water heater to eliminate limescale accumulation on the burners within. Typically, flushing is required every 2 to 3 years in the majority of situations. When flushing maintenance is necessary, tankless water heaters will automatically shut down and display an error code on the display.

The number of minerals present in the water supply has an impact on the hardness of the water in the tap.

As the water warms, the sediment separates from the water in the same way as it does in a tank-style water heater.

How to Flush and Descale a Tankless Water Heater

It is necessary to do periodic maintenance on a tankless water heater in order for it to operate properly. It is possible to flush your tankless water heater in order to clean and remove mineral deposits from the burner system by following these steps:

Supplies You Will Need:

  • 5 gallon bucket, 3 gallons pure white vinegar or descaling solution, 2 clothes washer hoses, channel lock pliers, 2 clothes dryer hoses

It is possible to acquire the My PlumbingStuff – Tankless Water Heater Flushing Kit – 32-ounce at this location.

User Instructions for the J.C. Whitlam FLOW32 Flow-Aide System Descaler – Zoeller 42-0007 Floor Sucker Pump – 5-Gallon Bucket – Safe to Use. This practical set comes with a 5-gallon bucket, two hoses, a descaling solution, and a sump pump, among other things.

Directions for Flushing Tankless Water Heaters:

The connections under the tankless water heater may be accessed by removing the cover on top of the unit. Some tankless types may not have a cover fitted at the time of purchase.

Step 2: Verify your tankless water heater has a flushing kit installed

If the flushing valves on your tankless water heater are not there, check to see if they have been installed. Stop what you’re doing and call a qualified plumber to install them.

Step 3: turn off the gas supply

Turn off the gas feed to the tankless water heater at the main shutoff valve. It will be necessary to switch the gasoline supply such that it is “perpendicular” to the fuel line. It is not necessary to cut off the electricity to the electric thermostat.

Step 4: Turn off the water supply

Close the cold water supply valve, which is responsible for supplying water to the tankless water heater, to prevent it from being used. Cold water is prevented from entering the unit as a result of this. Close the hot water supply valve, which is responsible for delivering hot water from the tankless water heater to the rest of the home. Shot water is prevented from entering the home as a result of this. Use this opportunity to inspect your temperature and pressure relief valve (T P valve) to confirm that it is in proper operating order.

Step 5: Open the flushing valves and connect the hoses

Remove the caps from the flushing valves and set them aside. This is important in order to relieve any pressure that has built up inside the valves. Connect the hoses to the flushing valves and tighten the connections with channel lock pliers to ensure that they are secure. Check to see that the rubber washers are properly seated in the tube to ensure a tight seal and avoid leaks. The flushing valves should be opened by rotating them 90 degrees at right angles (or perpendicular) to the existing positions of the cold and hot valves, respectively.

Step 6: Setup the bucket and sump pump

Add descaling solution or white distilled vinegar to the 5-gallon bucket until it is completely filled. Lower the sump pump into the 5-gallon bucket filled with descaling solution or distilled vinegar, and then turn on the sump pump to start the cleaning process.

Step 7: Flushing the tankless water heater

Using a descaling solution, allow the sump pump to run for 30 minutes; if using vinegar, allow the sump pump to run for 1-2 hours. Using this method, the cleaning solution will be pumped through the water heater and into the pipes to be cleaned. Completely switch off the sump pump once the job is done. Remove the hoses and pour the cleaning solution container into a trash can. Using clean water, rinse off any residual descaling solution that may have accumulated in the bucket. Until the water running through the system is clear, you’ll need to repeat this procedure several times.

Step 8: Finishing up and closing the system

The hosing should be removed from the flushing valves. Replacing and tightening the purge port caps properly is essential. Take care not to damage the rubber seals that are contained within the caps. If you do, you must replace them as soon as possible.

Step 9: Check the sediment filter

The sediment filter is situated on the cold water input line that feeds into the tankless water heater system.

Remove the sediment filter by unscrewing it and wiping it off with a damp cloth if necessary. When you’re finished, remove the filter and replace it.

Step 10: Open the water supply to the tankless water heater

Rotate the cold water supply and hot water supply valves so that they are in line (or parallel) with the pipes before opening each of the valves.

Step 11: Turn the gas on to the tankless water heater

To finish, turn on the gas supply valve so that it is in line (or parallel) with the pipe system. Start by turning on the hot water faucet. This will drive any trapped air out of the pipe that has been stuck there. Run the water for as long as it takes for all of the air to be expelled, which is about 2-3 minutes in total. Items should be cleaned and stored for use the following year. That’s all there is to it! This is a step-by-step guide on cleaning and maintaining your tankless water heater.

When Should You Descale a Tankless Water Heater?

Descalement of your tankless water heater does not have a specific schedule for when it should be performed. This will be highly influenced by the hardness of the water in your location. Tankless water heaters should be descaled once a year if you live in a region with extremely hard water. You’re not sure if you have hard water or not. You may use theHealth Metric Drinking Water Test Kit for Home Tap and Well Water, which is an EPA-recognized at-home water analysis kit, to assess the quality of the water that is coming into your home from your water source.

It is recommended that you describe your tankless water heater every 3-5 years if your water is soft or if you have a water softener system installed in your home.

Clean the Air Filter

  • The tankless water heater should be turned off and unplugged. Remove the front cover of the book. It is customary for the air filter to be situated at the top of the water heater. Identifying and removing the air filter will allow you to determine whether or not it is unclean. Use a soft-bristled brush and a mild dish soap and water solution to clean the air filter if necessary. Afterward, rinse it well with clean water and allow it to dry on a lint-free towel Replacing the filter and the lid, as well as plugging in the water heater and turning it on

Clean the In-line Water Filter

  • To switch off the gas supply to the water heater, turn the valve so that it is perpendicular to the supply line. The cold water supply to the water heater should be turned off by twisting the valve perpendicular to the supply line. The in-line water filter should be installed at the cold-water input. Remove the filter from the cold water line by unscrewing the nut. The water filter should be cleaned under running water or with a cotton swab, as necessary. reinstall the water filter, reopen the cold-water supply valve, and reopen the gas line that supplies the water heater

How Much Does it Cost to Service a Tankless Water Heater?

Tankless water heaters may be extremely expensive to fix or maintain on a professional level. Plumbers’ rates often range from $200 to $800 each service call, depending on the location. A service price for cleaning a tankless water heater will most likely range between $300 and $400 dollars. Performing the work on your own will save you a significant amount of money in the long run.

Can I Use CLR to Clean My Tankless Water Heater?

There are several differing viewpoints on the effectiveness of using CLR to clean a tankless water heater. Those that believe in a 60-minute flush with white vinegar as the descaling ingredient, such as Jason Fleming, marketing manager at NoritzAmerica, a maker of tankless water heaters, advocate doing so. CLR-type products have the potential to be damaging to the copper heat exchanger in a water heater. 1 Although I’ve spoken with a number of qualified plumbers, they’ve all stated that vinegar alone may not be powerful enough to dissolve build-up in water heaters that aren’t maintained on a regular basis.

A variety of home items, such as coffee pots, showerheads, toilet bowls, and washing machine basins, may be cleaned using this product in an environmentally friendly manner.

Is Cleaning a Tankless Water Heater Worth the Time and Money?

It is true that the initial cost of a tankless water heater (which often costs approximately $1,750) is more than the cost of a regular tank-style water heater (which typically costs around $1,000). However, it will save you a significant amount of money in the long run. The long-term advantages offset the greater initial cost, making them a more advantageous investment. Gas-powered tankless versions, according to the United States Department of Energy, consume less energy and save around $108 per year in heating expenditures, making them anywhere from 24 percent to 34 percent more energy efficient overall.

Electric tankless heaters save around $44 per year, which is still a significant savings when compared to traditional storage tank types. Bottom line is that, in the end, they are well worth the time and effort. Tankless water heaters, when used appropriately, may save you money.

Final Thoughts

Maintenance and servicing a tankless water heater are relatively simple tasks that can be accomplished with the correct equipment and a little handyman expertise. Simple step-by-step instructions will allow you to safely and properly clean your unit, saving you hundreds of dollars in plumbing bills. If you want to save time and money, you may purchase a descaling kit or flushing system, which is widely accessible online and includes everything you need to thoroughly clean your unit. This kit may be reused, which allows you to save even more money in the long run.

Thank you for taking the time to read this.

DISCLAIMER: The information provided on HomeInspectionInsider.com is not intended to be professional guidance.

Hubert Miles is the owner and operator of the website HomeInspectionInsider.com.

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