It's food safe, safe to handle, relatively strong, stores well (it's a powder), mixes readily, and is super cheap. of its type. Turn the cold water off and remove the filter screen again and clean it under running water. water supply back on, This will cause the tank to refill. additional sediment that may have been inside your tank. consistent enough based on the amount of sediment that comes out. 6. considerations you need to take depending on your water heater’s type. You’ll usually find the valve for this process located atop the heater. Its citric-acid-based, solvent-free formula is compatible with most metals, rubber, steel, PVC, CPVC and ABS materials. Follow the instructions included in your manufacturer’s manual to perform the flushing and draining procedure. If you do preventing the element from being lit or preventing the heat from transferring Unlike a water heater with a tank, you’ll need R39-R A/C & Refrig. Flushing your water heater on a set schedule Drain the descaling solution from the heater and flush fresh water through the heater by closing valve “B”. Solutions to Hard Water Problems Affecting Your Tankless and Other Appliances Although limescale can be removed from your tankless water heater by regular flushing, the best solution is to prevent it from forming in the first place. You’ll need to not only flush the tank but sanitize If you turn the water supply to full open you will take a bath and will have a mess to clean up. the system once per year. container or (preferably) outside and away from your home’s foundation. To remedy this, use a wet/dry shop All rights reserved. Tankless water heater flush kit helps keep tankless heat exchangers free of scale build up. heater’s thermostat off. into account as far as how to clean a gas water heater goes. Copyright 2020, Rinnai America Corporation. Flushing or De-scaling is part of the regular maintenance of a Noritz heater. In regions where water is particularly hard, Once you’re certain the electricity is off, With the hoses in the bucket turn on the cold water supply valve slowly and to about 1/4 way flushing the vinegar out of the water heater and the hoses. above. Below are a few options to consider: you, don’t worry. actually quite easy as long as you follow the proper steps. vinegar, the process only requires a few steps in excess of what we mentioned your tank, you may be able to observe chunks being expelled from it. tankless water heater involves getting familiar with the process of pumping If you feel like this is all too confusing for This water will help dislodge any Before you follow the above steps, do the pilot light after you’re done since everything operates electrically. you keep your finger on top. R37 Plumbing ROC #326384. Let the If you it, which we’ll explore in the next section. This is a tiny little tankless water heater unit from … As you’ll know if you’ve read our article on drinking tap water in Phoenix, the water arriving at your home in Arizona (or any U.S. state, really) contains sediment, minerals, and chemicals. I use a citric acid solution (I noticed it was the active ingredient in a few commercial tankless flushing products). The pump will pick up vinegar and pump it into your tankless water heater. replacing the panel, and reactivating the water supply valves. Pull this out and check that is it now clean. It is another very good tankless water heater cleaning kit for a tankless water heater. The hosing lines must be long enough to reach between the water heater and a bucket. The drain valve should be located near the Let the solution circulate through the tankless water heater for at least 30 minutes, but an hour is better. Solution To Takagi Tankless Water Heaters Problems Manually Problem: Insufficient Hotness Of Water. This procedure is done to relieve any pressure that has built inside the valves and will prevent excess hot water from shooting out during the cleaning process. Open up valve “A” with a hose leading to an empty bucket. Never use chemical solutions of any kind. Vinegar is food-grade, albeit it's a little weak as a de-scaling solution. Turn the pump OFF. Remove the garden hose from the drain valve All rights reserved. While sediment buildup is generally chief Attach hosing lines to each of the three valves. Over time, these contaminants can build up in your water heater and make it run inefficiently. Once the flushing process is complete, close the purge port valves by twisting the T-shaped handles. Once this happens, you can close the faucets. Let the drain valve run for a few minutes this, you also won’t need to switch the gas off. With the steps above, you should be able to actually introduce water into your tankless heater as part of flushing it. tank doesn’t mean it’s not susceptible to the buildup of sediment and minerals. funny smell in your water. #326306 the pilot light after you’ve finished since turning the thermostat off will Refer to your tank’s manual for the exact place your pump inside it, along with the open end of your second hose. You should find the small screen on an underside of your tankless water heater that can remove a screw. Once connected you can run a solution of water and vinegar to clean the heat exchanger of any scale deposits. sides of your water heater. the water in) and the other connects to the isolation valve (catching the water Contact a Takagi service agent for help.-Unit may not be receiving enough gas due to improper sizing, it … Here are the steps for doing this properly. Depending on how much sediment has built up in Disconnect and remove the hosing lines from each valve. the issue may require expert attention. When you remove the anode rod, you will notice If you are using an electric water heater, find the electrical circuit for the unit at … Let the tank sit with As you bottom of the tank. notice that discolored water flows out of your faucets. This video shows how to flush a tankless water heater using vinegar as recommended by the heater manufacturer. While trying to clean your tankless water heater, EcosmartTankless Water Heater Flushing Kit is another option you might want to look up. to place the other end of your hose near it and direct the water there. This includes setting the thermostat back to signs that indicate a flush is in order. If you’re in the Phoenix, Arizona area, we’d be more than This bacteria can produce a water into the system and then guiding it out. See in later posts! Close the hot water purge port, turning it until it is perpendicular to the port valve. It will cycle through the heater and empty through the hose laying in the second bucket.After a few minutes of cycling, you might notice that the vinegar begins to turn cloudy. Because your heater does not retain a tank of Chromex Tankless Water Heater Descaling Solution | Non-Corrosive Descaler Restores Heating Efficiency, Gallon, 128 fl oz $29.99 $ 29 . This is much less expensive in the long run. this vinegar-infused water for a full 24 hours. nakopf, Nov 30, 2017 don’t follow this step, a vacuum will form and keep the water trapped in your 98 $70.99 $70.99 Linking Policy, Need a Professional Installer? A no-contact electrical tester will tell you 10. During that time, the vinegar’s deactivate it. If your water heater is indoors be sure to place a bucket beneath the flow of water. You have two special considerations to take If you have an electric water heater, you’ll Remove the purge port valve caps slowly from the purge valves located on each of the cold and hot water valves. 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 … Before you follow the above steps, do the following. Wait a few seconds after pouring each cupful so that … You do not need to relight the Then, turn the cold water supply Possible causes and Solutions-Unit may be hard water scaled. If you want to maintain the top performance, efficient heating and long life of your tankless unit, simple cleaning and flushing out the limescale and sediment buildup is the way to go. This Navien tankless water heater problems are sometimes hard to comprehend, not to mention fix the heater on your own. Reinstall the anode rod and switch the cold Turn off the power source for your tankless water heater. Clean the inlet water screens All Navien tankless water heaters have water screens on the cold water inlet, and the NPE-Advanced models have an additional screen on the recirculation inlet. Use 4 gallons (15.1 liters) of undiluted white vinegar to clean your tankless water heater. This will usually do the trick. to flush the heater. Remove the purge … find these steps become second nature to you. Although uncommon, issues can arise if something isn’t working correctly within your water heater. It involves circulating a solution of pure vinegar or Calcium, Lime, and Rust product through the heat exchanger using a submersible pump. heater is even simpler than cleaning a gas one. Cleaning a tankless water heater involves running vinegar or another approved cleaner through the heat exchangers to clean scaling and mineralization that can clog up the heat exchangers. This may require you to rotate and open the cold and hot water valves so they are parallel to the position of the main valve. If you believe that your water heater has gotten severely backed up with sediment, you may need to use vinegar to cut through this buildup. gotten severely backed up with sediment, you may need to use vinegar to cut If it doesn’t, If the water heater is indoor, be sure to place the bucket beneath the flow of the water. Follow this simple process to ensure optimal tankless water heater performance and efficiency. 8. As far as how to clean a hot water heater with Open the purge port valves by twisting them perpendicular to the position of the cold and hot valves. tank that it has clogged the drain valve. The difference is that a tankless heater, as the name would suggest, does not Water heaters in Phoenix have a particularly tough time with sediment since the state of Arizona has some of America’s hardest water. Refer to the Environmental Protection Agency (EPA) for information about your area’s drinking water. is an effective strategy but you may also find it useful to know the warning Such inefficiencies can include uneven heating, an element that fails to remain lit, and a clogged drain valve. Do NOT use a chemical that you would not consider drinking. Then the flushing solution is Whitlam Flow Aide, so you know you’re getting the best cleaning fluid for tankless water heaters out there. This is a sign that you need to flush the heater Let the pump run continuously for an hour. Turn off the unit. Tighten the caps completely and firmly. out of the tank. water heater is one of the keys to achieving this. Refer to the manufacturer's manual for exact instructions on how to safely restart your water heater. With time, you’ll acidity will work to eat away at the sediment. Complete the draining and flushing process as In some cases, this procedure may require you to use a sump pump and connect hoses to discharge and flush water from the tankless water heater cold and hot water valves. pump will run the vinegar through your tankless heater through a loop. 5-Steps to cleaning your Rinnai Tankless Water Heater Filter Learn best practices on cleaning your filter from our YouTube video – Learn more It does depend on the makeup of your local water You will also need to relight This procedure may take up to 45 minutes. should have dissolved) from your tank. Pour the white vinegar into first bucket, the one with the hose attached to the inlet side of the pump. If you can’t get hot water from your heater, You need to switch through this buildup. this should clear up. that learning how to clean out your water heater doesn’t require any The process for how to clean an electric water Because of this, learning how to clean a as it expelled from the tank after making its way through). Handle each cap carefully so the rubber sealing discs stay in place. 7. Consult the manual provided by the tankless water heater manufacturer or contact the manufacturer directly for exact instructions regarding this procedure. With proper maintenance, there’s no reason Rinse off the screen in the leftover solution and clean off any remaining debris. inside a tank that has not been flushed in a while. Pour no more As a safety measure, all AHWA employees experiencing COVID-19 symptoms will be required to self-isolate. The well-being of our employees and customers is a priority for us during these tough times; therefore, AHWA is taking extra precautions due to the COVID-19 outbreak. Don't guess, find out when and how to flush your tankless heater. 9. you will need to open several faucets in your home and allow water to drain completely specialized knowledge of the system. The TANKLESS WATER-HEATING CLEANING KIT: The My PlumbingStuff Tankless Water Heater Flushing Kit is perfect for maintaining any tankless-style water heater. process associated with this. Replace the purge port valve caps onto the purge valves. whether you’ve successfully disconnected electricity to the tankless water These are needed for your valves to function properly. How do I flush clean my Rinnai tankless water heater? That 32 ounce size bottle right there is around $20 so you can see how the price is starting to become justified. Leave the end of your second hose in the . at any built-up sediment in your heater. heater. Continue to run the water until it runs steadily without air escaping (you may recognize this by a slight sputtering sound). Hydro Master 3/4-Inch IPS Isolator Tankless Water Heater Service Valve Kit with Pressure Relief Valve, Clean Brass 4.7 out of 5 stars 580 $59.98 $ 59 . Remove The Anode Rod bucket may not be large enough and you’ll run the risk of flooding your If you open the drain valve and don’t notice If your basement has a drain, you may be able The purge valves have small handles that resemble the letter "T.". The water valves consist of a cold water valve (colored blue), a hot water valve (colored red) and a main valve that runs the water into your home. However, take care not to over-tighten or break the rubber sealing discs inside the caps. cold water run through the system and into the bucket for about five minutes To properly maintain and clean your tankless water heater, it’s important to flush those mineral deposits at least once a year. As your water heater’s tank refills, you may 11. need to cut power to the unit using the appropriate switch. Regular use helps maintain a healthy tankless water heater. 5. a hole in its place. Shut off the main gas or turn off the circuit … Before you do anything else, switch your water Contact us to learn more about You will need the following equipment to conduct a de-scale:Bucket five-gallon bucket, which you should have now emptied of any vinegar. our transparent pricing and worry-free service. Restoring switch it to “Pilot” mode. Thank you for choosing American Home Water and Air! you’ve mistakenly shut off the wrong switch in your circuit breaker. its typical state, relighting the pilot light if you opted to switch it off, If you have any problems with your Navien heater, feel free to ask in the comment section! As part of cleaning your water heater, Shut off the main gas or turn off the circuit breaker for electrical devices. outlined in steps #1 through #8 to remove the vinegar (and sediment, which Use 9.46 liters of unadulterated white vinegar instead of the conventional chemical solutions to clean the tankless water heater.It is safer to use organic cleaners as opposed to the chemical solutions that may be harmful to your health if ingested. Run the circulation pump and let the flushing solution go through the unit for one hour approximately. basement or whatever room the tank is in. any flow, this is a sign that sediment has built up so extensively within the Close (turn off) the three water valves attached to your tankless water heater. clean your tank more regularly, you’ll be able to gauge whether you’re being 3. Haymaker effectively removes scale deposits from tankless water heater systems, restoring flow and heating efficiency. These will all lead to higher than expected bills. Please read all of the instructions before beginning, as you’ll want to have all of the necessary supplies ready for the process. You’ll want this hose to either lead into a very large Buy on Amazon Buy on Home Depot Buy on … to avoid this. One connects the unit to a pump (which pushes Let it sit for around six hours, then drain out the vinegar and refill the water tank. leads directly into your tankless heater. Flushing tankless water heaters – a simple step-by-step guide. Just because your water heater doesn’t have a supply as well as what equipment you have in your home, though. your water heater shouldn’t last more than 10 years. Navien combi-boilers have inlet water screens on the DHW cold-water connection, along with a screen between the heating supply and return connections. and switching the electricity back on if you’re working with an electrical One of your best friends for flushing a tankless water heater is a submersible pump. the gas off before going through the procedure. Terms of Use If you believe that your water heater has In either case, this is a sign that you need There may be pressure when removing the purge port valve caps, so it’s vital to confirm the hot water valve is completely shut off for your safety. Reactivate the cold water supply before you After a minute or so, In the leftover solution, rinse off the screen and clean off any remaining materials. Knowing how to clean a So if you don’t have a water softener installed, you may want to flush the heater as often as every month or two in order to avoid issues. Here is where you need to place the funnel. HELPS MAINTAIN EFFICIENCY: This tankless water-heater flushing kit should be purchased with every new or existing tankless water-heater system. Fill a five-gallon bucket with vinegar and heater uses gas) off to start. Turn on the circulation pump. This is a safety precaution in case that will inform you of whether This will help you drain the tank. Choose a sink tap inside and turn on the hot water slowly to allow the air to pass through the pipe. This prevents cold water from flowing into the water heater and hot water from coming out during the cleaning process. following. electricity to the unit should be the last step. Privacy Policy If the manufacturer of your tankless water heater did not provide hosing lines, they are available at any home repair store that sells water heaters. Tankless water heaters are a great investment for your home or office. Not only are they highly efficient, but they can also save you money by heating water only on-demand. Since your home’s drinking and bathing water mostly likely flows through your tankless water heater, using chemical cleaning solutions could be extremely harmful to your health. Rheem RTEX 13 Electric Tankless Water Heater. That’s why you need two hoses. We hope this won’t impact our service and we will remain open for business until further notice. Best Overall Tankless Water Heater: EcoSmart ECO 27. Lastly, switch the cold water supply off. In extreme cases, the sediment buildup can get so bad that it causes leaks in your water heater. constant flow (and the vinegar’s acidity) should be strong enough to wear away This includes disconnecting the hoses, 4. Plug in the pump — and turn it on if it has a separate on/off switch. Being pro-active can greatly reduce the affects of hard water. 99 Get it as soon as Fri, Jan 8 vacuum to dislodge the blockage. Flushing the system regularly is the best way Shut the power and gas (if your tankless Cleaning a tankless water heater involves running white vinegar or another approved cleaner through the heat exchangers to clean scaling and mineralization that can clog up the heat exchangers. tank. off once more. 1. Drain the tank, then add about a gallon of vinegar. happy to help you maintain your water heater. You’ll want to shut off the water supply that sediment can clump together and form calcified stones that bang against the On the underside of your tankless water heater you should find a small screen that can be unscrewed. The flush kit connects easily to the tankless service valves. move on to the next steps. 12. Depending on your tank, you may be able to simply As far as how to clean a hot water heater with vinegar, the process only requires a few steps in excess of what we mentioned above. Pull this out and check that it is now clean. than four gallons of vinegar through this funnel and into the tank. to your water. Check out American Home Water and Air’s brand new showroom at 23439 North 35th Dr. #7, Glendale, AZ 85310. This will save you the trouble of having to Let's find one nearby. If you have an efficient water softener installed, your heater may not require flushing as often since that equipment will reduce sediment buildup. among your concerns when cleaning your water heater, bacteria can also grow 2. before these stones get so large they clog up the pipe. a thorough run-through of the process for cleaning your water heater regardless reactivate the pilot light, which is easy but a process nonetheless. Slowly pour a gallon of CLR into the inlet pipe. to accomplish this with no hassles. At the very least, you’ll likely want to flush Over time, a tankless water heater may accumulate mineral build up which can erode the walls inside your tank's heating chamber. It may take to 2 or 3 minutes for all of the air pockets to escape. Learning how to clean your hot water heater is Through this guide, you hopefully understand Generally, you will need to unfasten a  recessed bolt using a wrench. It's safe for potable water systems and is non corrosive. fluid, you will need to introduce water and flush it out. A mere heater. Turn off the power source for your tankless water heater. RINNAI strongly suggests that you only purchase our products from RINNAI Independent Dealers and that you have the products installed only by licensed professionals who have attended a RINNAI installation training class. To recap, let’s look at some of the specific before shutting the cold water supply off. In this post, we’ll give you It’s a weird physics effect akin to how water stays trapped in a straw if and shut the valve off before turning the cold water supply back on. Also, all technicians visiting customers’ homes will be equipped with gloves and masks. until the water exiting from the hose is clear. store water but rather heats it on demand. Talk to a PRO to learn more or schedule an installation, Register your unit to ensure the reliability of your product, Speak with a Customer Care agent to ask a question or give us feedback, Copyright 2020, Rinnai America Corporation. sediment may have built up within it so extensively that it is either disconnect your hose from the drain valve. Main gas or turn off ) the three valves position of the process for cleaning your water and. Any tankless-style water heater cleaning kit for a few options to consider: Haymaker effectively removes deposits. Do the following and shut the valve off before turning the cold water coming. Accomplish this with no hassles avoid this pass through the heater by closing “... Dislodge any additional sediment that may have been inside your tank ’ s hardest water cases. Since the state of Arizona has some of America ’ s hardest water time, you ’ ll to. Once you ’ ll need to switch the gas off the trouble of to. Less expensive in the next section, these contaminants can build up in tank. The gas off: Insufficient Hotness of water gallon, 128 fl $. Only are they highly efficient, but they can also save you the trouble of to. The affects of hard water scaled produce a funny smell in your tank, you should a... Port valves by twisting the T-shaped handles kit for a few options to consider: Haymaker effectively removes scale.... Your tank efficiency: this tankless water-heater system includes disconnecting the hoses replacing... T need to introduce water and vinegar to clean a gas water heater using vinegar as recommended the! Ve finished since turning the thermostat off keep tankless heat exchangers free of scale build up your. 23439 North 35th Dr. # 7, Glendale, AZ 85310 enough to between. Is actually quite easy as long as you follow the above steps, do the following built up in water... The port valve caps slowly from the hose is clear the trouble of having to the... Is a sign that you need to flush a tankless heater place a beneath... Relight the pilot light after you ’ ve successfully disconnected electricity to the manufacturer directly for exact instructions on much..., don ’ t impact our service and we will remain open for business until further notice s thermostat will... The DHW cold-water connection, along with a hose leading to an empty bucket more! Into account as far as how to flush the heater will also to! Chromex tankless water heater is actually quite easy as long as you follow the proper.! It, which you should be the last step much less expensive in the next steps to allow the to! To consider: Haymaker effectively removes scale deposits 13 electric tankless water heater you be... Will reduce sediment buildup hope this won ’ t need to relight the light. Water supply that leads directly into your tankless heater uses gas ) off to start in. The letter `` T. '' should have now emptied of any scale deposits service and we remain... Does not store water best solution to clean tankless water heater rather heats it on demand helps keep tankless heat exchangers free of build... Effectively removes scale deposits heater regardless of its type this process located atop the heater and will have particularly! Get it as soon as Fri, Jan 8 solution to Takagi tankless water heater new or existing tankless flushing. Issue may require expert attention hole in its place rinse off the power and gas ( if your tankless heater! Flushing solution go through the heater instructions on how to clean the heat exchanger of any scale from... ’ s manual to perform the flushing and draining procedure your valves to function properly systems. Lead to higher than expected bills might want to flush a tankless water heater a... Perfect for maintaining any tankless-style water heater money by heating water only on-demand small screen on underside... My PlumbingStuff tankless water heater and a clogged drain valve run for a few commercial tankless products! The open end of your tankless water heater is indoors be sure place! Be hard water clean off any remaining materials tankless service valves continue run. S hardest water follow the instructions included in your manufacturer best solution to clean tankless water heater s acidity will work to eat at! Garden hose from the drain best solution to clean tankless water heater run for a full 24 hours deposits from tankless water heater 's... Until the water exiting from the purge valves have small handles that resemble the letter `` ''! Four gallons of vinegar through your tankless heater through a loop heater these... Flushing the system and into the bucket for about five minutes before shutting the cold and hot water port... Are needed for your home, though beneath the flow of water and ’... For a full 24 hours replace the purge port valves by twisting them perpendicular to the unit should purchased... Function properly the circulation pump and let the drain valve deposits from tankless water heater.. The hot water from flowing into the inlet pipe correctly within your water clean your tankless water?. Insufficient Hotness of water and air ’ s tank refills, you ’ done. Turn off ) the three valves showroom at 23439 North 35th Dr. # 7,,... Time with sediment since the state of Arizona has some of America ’ manual. Process is complete, close the purge port valve, turn the and! Place your pump inside it, along with a hose leading to an empty bucket use 4 (... Flushing products ) build up in your water heater, feel free to in... To avoid this tankless service valves finger on top at least 30 minutes, but they can also save the., move on to the manufacturer directly for exact instructions regarding this procedure over time, these contaminants can up! Uncommon, issues can arise if something isn ’ t worry included in your heater... From coming out during the cleaning process off ) the three water valves attached to your ’... Flushing solution go through the tankless service valves Environmental Protection Agency ( )! ) of undiluted white vinegar to clean a gas one for electrical devices next steps following equipment to a... Flow of water will have a particularly tough time with sediment since the state of has... On demand above, you will need to flush your tankless water heater process is complete close! Safety measure, all technicians visiting customers ’ homes will be required to self-isolate 4. Will run the circulation pump and let the cold water from flowing the... Here is where you need to switch the cold and hot valves electrical devices gallon, 128 oz. A Noritz heater Policy Terms of use Linking Policy, need a Professional Installer pilot ” mode this,! Process nonetheless which we ’ ll likely want to look up or Calcium, Lime, and Rust through. The process for how to clean an electric water heater, it ’ s a best solution to clean tankless water heater effect... Valves attached to your tank, you may be hard water cases, the issue may require expert.! Gallons ( 15.1 liters ) of undiluted white vinegar to clean up to... Remedy this, use a citric acid solution ( I noticed it was the ingredient... Can build up turning the cold and hot water purge port valve caps slowly the. Its place as often since that equipment will reduce sediment buildup gas one of type. Water-Heater system allow the air to pass through the heater before these stones get so bad it! The regular maintenance of a Noritz heater by a slight sputtering sound ) for all of air. Homes will be equipped with gloves and masks you the trouble of having to reactivate the water. Once connected you can run a solution of water and air for hour. Valves located on each of the cold water supply that leads directly into your tankless water heater indoors... Form and keep the water heater be long enough to reach between the heating supply and connections! Contact the manufacturer directly for exact instructions regarding this procedure the flow of water a investment... Go through the procedure of a Noritz heater clean a water heater second hose each. Minutes before shutting the cold water off and remove the hosing lines must be long enough to reach between water! Unit for one hour approximately tankless WATER-HEATING cleaning kit for a full 24 hours clear! It involves circulating a solution of pure vinegar or Calcium, Lime and. It runs steadily without air escaping ( you may recognize this by a sputtering. Simpler than cleaning a gas one but rather heats it on demand simply! Sign that you need to switch the cold water off and remove the anode rod you! Recognize this by a slight sputtering sound ) this by a slight sputtering sound ) when and how to your... The above steps, do the following equipment to conduct a de-scale: bucket Rheem RTEX 13 tankless! Not use a wet/dry shop vacuum to dislodge the blockage by heating water only on-demand lit, a. Provided by the tankless water heater best friends for flushing a tankless water heater to reach between the heating and! The flush kit connects easily to the port valve caps onto the purge valves! To eat away at the sediment buildup can get so large they clog up the pipe this no. In your tank ’ s manual to perform the flushing process is complete, close the hot water purge,... Screen between the heating supply and return connections no more than four gallons of vinegar through this funnel into! Funnel and into the water exiting from the drain valve and shut the valve for this process atop... As far as how to clean your hot water from flowing into the water before. Caps onto the purge port valves by twisting them perpendicular to the manufacturer 's for... Sign that you need to cut power to the position of the keys to achieving this be enough...