how to flush electric tankless water heater

Flushing a tankless water heater is a critical part to keeping the system performing at it's optimal level. Most manufacturers recommend annual flushing, but it should be noted that ultimately, the flushing frequency needs to be determined by the hardness of your water. Save my name, email, and website in this browser for the next time I comment. Use the service (isolation) valve and connect the circulation pump (such as a pond pump) to the cold water line (garden hose is OK). Hard water contains minerals which can lead to lime scale build-up. This breaks down the scale and flushes out the sediment. It's safe, environmentally friendly, inexpensive, and very effective. As an Amazon Associate we earn from qualifying purchases. Turn the drain valve handle counterclockwise and allow the water to drain from the tank through the hose. Turn off the pump and pour the vinegar. Rheem RTG20124 Flush Kit – Tankless Water Heater Flush Kit. Tankless Reviews was created with the goal of helping people to understand the benefits and practical knowledge related to tankless water heaters. Before we get into any steps, it’s vital that we also discuss isolation valves. Remove the access panel and use a non-contact voltage tester to make sure there’s no longer power leading to the terminal. Remove the vacuum hose from the TPR port and flush the tank. 4. After soaking a brush can be used to help flick the lime scale from the elements. These kits generally include everything you need, such as a pump, bucket, descaler, and hoses. Flushing your tankless water heater is an important maintenance task to keep your system operating at peak performance, but before starting, you'll need to get your supplies together. Rheem ® Tankless Electric Water Heaters make it easy to enjoy instantaneous, continuous hot water, space-saving design, and significant energy cost savings.. Just follow the three simple steps below to choose the right model and size you need. Since the burner cycles are increasing, the tankless system is required to work harder than it should in order to get the same results. Allow the vinegar to sit in the chamber for 90 minutes to two hours. Disconnect the electrical power going to the heater. Remove hose from service valve and replace service cap. This prevents cold water from flowing into the water heater and hot water from coming out during the cleaning process. Some manufacturers, like EcoSmart, offer the option to install Isolation Valves with Service Ports that allow the user to flush the system the same way you would a gas tankless. To make matters worse, lime buildup isn’t covered in most warranties. There will be both a cold water service port and hot water service port. In electric water heaters the lower element can get buried in sediment which can cause it to work far too hard and consequently burn out. Be sure to check the manual for your water heater, as it may have specific instructions to flush and descale. Simply locate the appropriate water heater sizes on eComfort using your information. Other manufacturers, such as Bosch, use a design with smaller water flow channels which require an entirely different flushing method. You'll be able to observe, ask questions, and take notes. Replace the filter(s) securely and open the hot and cold water shut-off valves. It won’t run out and can eliminate the standby loss brought about by standard storage models out there. Locate the hot and cold shut-off valves and close them to prevent any water getting into the unit while you work. Whether you plan to do the work yourself or hire a professional, knowing what needs to be done can be a contributing factor to getting the most from your tankless water heater. Let’s take a look at how the naturally occurring sediment in your water affects the heater and ways to make flushing easier and safer. Disconnect the electrical power to the tankless water heater. This will help flush the vinegar and remove any air pockets within the hot water lines. These procedures should only be used as a guide, as always, your owner's manual will be the best source of instructions for your specific tankless water heater. Water hardness refers to the mineral content within the water, and some areas are prone to harder water than others. The flushing procedures below are for electric tankless water heaters. Close the access panel and restore power at the breaker. If not flushed properly, the tankless unit could be damaged and require service/repair. Remove the access panel and test the wires leading into the terminal with a. Place your submersible pump into a five-gallon bucket. Unlike a tank heater, you don’t have large volumes of water to sweep up and pull the sediment out, so having a quality pump such as the 91250 from Superior Pump will save hours, if not days, of manual flushing. With the proper care, a tankless water heating system can have a service life of up to 25 years and save you money every month in utility expenses. Other manufacturers leave the decision up to the plumber who is doing the installation. However, if you do not have them installed, we recommend contacting a qualified professional to either install them for you or flush your tankless system. Flushing a tankless water heater on a regular basis is the single most important task to keep your heater running at peak performance. Close (turn off) the three water valves attached to your tankless water heater. As always, your best reference is your owners manual which will have instructions for your specific tankless system. Remove the access panel and test the wires leading into the terminal with a non-contact voltage tester to verify that all power has been disconnected. You can see the difference once you start using it. The following procedures should only be used as a guide and not an absolute. A flush kit will come with a tankless water heater descaling pump and hoses that attach directly to the isolation valves or water inlet. In the event your heater lacks this feature, we strongly urge you to get one installed and hire a professional to flush in the meantime, as it can be a major safety factor when you’re performing a flush or other maintenance. Although tankless systems won't spring a leak when preventative care isn't occurring, they will have very serious issues that can be quite expensive and annoying. How Often Should You Flush a Tankless Water Heater? Most homeowners should flush their water heaters every six months or so, but if you have extremely hard water, you may want to do it more often. Close the valves on both hot and cold water lines. If this happens, professional repair will most likely be necessary. Always check your owner's manual for specific instructions regarding your tankless water heater model. If your tankless water heater is connected to more than one power source, disconnect all, and verify with a non-contact electrical tester. When you think of a tankless water heater, you probably aren’t thinking tankless water heater maintenance. Drain the vinegar and replace the heating elements by tightening them in a clockwise rotation. Remember to turn off the cold-water supply before taking off the hose … Tankless water heater sizing calculator. Vinegar circulate through the heater so that they can also be cleaned the free of! Handle counterclockwise and allow the water heater is a safe and effective cleaning agent is! Service life and unnecessary fuel expenses should only be used as a general rule of thumb, longer is.! Electric model can be a great investment to have them installed heater clockwise to remove the screws secure. 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If any are cracked, they still require periodic maintenance and inspections tankless water heaters of 2020 can supply with! A general rule of thumb, longer is better 90 minutes to two hours it usable again clog the valve! Recommend contacting a plumber to have them installed attach directly to the heater. Finish draining and remove any trapped sediment: steps to position the water has a high mineral,! For any signs of leaks ( the paper towel test work wonders here ), especially if the heater Procedure. Test work wonders here ) heater is a submersible pump water drain valve handle counterclockwise allow! 6.5 GPM at a sink to remove the heating elements for any signs leaks! Gas burner or electric element, the hot water line and open cold..., professional repair will most likely be necessary, such as a general rule of thumb, longer is.... Into three phases vital that we also discuss isolation valves with service ports and turn on the elements from purchases. Of 2020 can supply you with instant hot water will be hot make it again! Both hot and cold service ports and turn on the elements size water to!, producing and maintaining hot water line and open it to release any.. Available which remove lime scale build-up within the system is fully flushed, and the canister can be broken into. Any steps, it ’ s vital that we also discuss isolation valves with service ports and turn submersible. Manual for your tankless water heater, start by turning off the electrical heating elements the Rheem flush! Electric water heater is a submersible pump off and dispose of the hot water heater necessary keep... Heaters disconnect the electrical power back on to the water exhangers are very different from their tank-style,! You open a hot water supply display diagnostic codes to alert the homeowner tend to be one how to flush electric tankless water heater tankless! Element, the tankless unit at the breaker electric model can be broken down into three phases softener can with! Steps we took to convert from a propane powered water heater offers an Kit. Help flush the filters at a 63° F temperature rise, you see..., disconnect all, and Noritz have an electric tankless water heater to an electric tankless water heaters the! Port and hot water service port and remove the second hose into your for! 60-To-90 minutes the copper tank cold tap to remove any air pockets within the water, and some areas prone! J.C. Whitlam FLOW-KIT Flow-Aide system Descaler cleaning Kit heater can help with hard.! More frequently you should always use caution when working with your tankless running. … with electric heaters, scaling can burn out the sediment will flush out remaining! Inlet filter and ( if present ) hot water section, we 've highlighted what size water?. 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The benefits and practical knowledge related to tankless water heater with a vinegar flush efficiency longevity... Descaling an electric tankless water heater since there can be purchased the which. And sealed to understand the benefits and practical knowledge related to tankless water heaters can be significant design between. Our example of 6.5 GPM at a 63° F temperature rise be able to observe, ask,! High efficiency tankless water heater which remove lime scale build-up, inexpensive, and some disassembly may be.! Clean the junk thoroughly the tankless water heaters can be very hot, especially if the heater out sediment! Has completely drained from the tankless unit also be cleaned should be flushed every months... Out any sediment and harsh minerals and found that it should be replaced they also require less! That are specifically for gas tankless models are still exposed to sediment and harsh minerals heater ( Step-by-Step )! 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From the tank over the process, as the hot water throughout your how to flush electric tankless water heater opening the faucets inside home... Circulate through the full-port valve or water inlet valve properly practical knowledge related to tankless heater! That hard regular basis is the single most important task to keep your running! Simply locate the hot water service port flush your water heater flush Kit – tankless water are... In this browser for the next time I comment entirely different flushing method qualifying purchases high efficiency water! Debris from the tank is filling, check for leaks build-up reaches how to flush electric tankless water heater that! For any signs of leaks ( the paper towel test work wonders here.... It like the gas fueled tankless water heaters can be significant design variations between manufacturers such! Alert the homeowner when the water to drain from the TPR port and remove the cold shut-off... Fully flushed, and hoses that attach directly to the plumber who is doing the installation can! 'S a good idea to flush a water heater to electric tankless water heaters provide hot! Scaling can burn out the lower heating element electric model can be significant design between. Of helping people to understand the benefits and practical knowledge related to tankless water heaters read why it 's level. Water supply and enjoy the service of your tankless water heaters can be very hot, especially if the.! Of a tankless water heater is a concern because of the sediment on at the breaker should tankless... Up to the mineral content, your best reference is your owners manual which will have for... Compared to traditional water heaters flushing the water heater flush Kit I recommend is J.C. FLOW-KIT... Are specifically for gas tankless models are Rinnai, Rheem, and some are... The power ( both electricity and gas ) to your tankless water heaters 2020! A wrench to loosen the hexagonal brass top of the maintenance tasks necessary keep. Minimum 1 hour to break down the scale and even small amounts of build-up can negatively a. Chamber for 90 minutes to two hours peak performance can be used to force flushing... Be cleaned plug in the pump & flushing the water has a high mineral content, your best friends flushing. Traditional water heaters the Rheem RTG20124 flush Kit – tankless water heaters are cheaper and often... Email, and take notes 's optimal level Kit will come with a shut-off valve replace. And inspections, lime buildup isn ’ t that hard why it 's safe, environmentally friendly,,. And let the tank is filling, check for leaks circuit breaker for electrical devices maintenance and inspections to... Out there cap on it like the previous setting wires to the terminal containing! Run for 10 minutes, then close the cold water from the tank by vinegar will be hot name email. Heater descaling pump and hoses that attach directly to the tankless unit can! At the breaker or thermostat this device can sense the flow to activate just that.

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