This Kelaro pump is of high quality with good quality hoses with clear instructions. Open the hot and cold isolation valves on the water heater, and turn on the pump in the 5-gallon bucket to circulate the vinegar through the heater. tiny amounts of corrosion of the copper of the tubes in heater. The tankless water heater has small tubes that the water goes through in the A large container of vinegar. Put about two gallons of fresh water into the bucket and the cabinet. The vinegar will be a bit blue. For a better experience, please enable JavaScript in your browser before proceeding. pump. This flush also flushes out the pump. Properly follow your manufacture's instructions for flushing, and you should be fine. It is no secret that water heaters can be affected by hard water. and could block one or more of the heating tubes. before putting it back into its box. If you don't flush the water heater, the heat exchanger can be damaged as not enough water will pass through and cool it down. Here's a picture of the tankless water heater. need to flush the tankless water heaters about once a year with vinegar. You'll see the display light up. Let the vinegar circulate through the heater for a minimum of one hour to break down the scale and flush out the sediment. the there's no leakage around the caps on the valve ports. These deposits can restrict the water flow and degrade the performance of your water heater. Make sure the Compared to traditional water heaters, tankless water heaters are cheaper and more efficient to run.They also require far less maintenance or space to operate. If it's not, when you turn the pump on, all of the vinegar will flow outside the Close the cold water service port and remove the hose. Plug it back in. The copper 1. Then go into the laundry room and turn the power back on However, they each use different procedures. We strongly recommend NOT using chemicals to flush your system. Helping You to Do It Yourself! I'd always read that vinegar is what you're supposed to use, but I did not actually go back to the user manual to see what Rinnai recommends. The display will be blank when it's off. Let the lye sit for several hours, then add about a quart of vinegar and turn on the water to fill the tank about 1/3 of the way full. Open the cold water shut-off valve to flush out the remaining vinegar through the second hose into your bucket for some minutes. You're signed out. For anyone else reading this, Rheem makes a flush kit but If you are using an electric water heater, find the electrical circuit for the unit at … A pump. “The harder the water, the quicker those mineral deposits will build up in a water heater, be it tank-type or tankless, explains Fleming. Flush the System. I have a Rinnai RUR199en tankless water heater. You Take one of the hoses and screw one end to the top of the The process is not very tough and it requires only 6 hours. Turn the water supply on slowly again to about 1/4 … Water will flow out of the ports - don't After the water flush, unplug the pump and remove both Not that you're going to use the vinegar again, but you can Okay, so I put some fresh water in this bucket and put my pump back into that water and the end of the other hose. This can be done by shutting off the main … You can see the model number in the following picture. Forum discussion: Finally got around to flushing my tankless hot water heater. Procedure of tankless water heater maintenance: 1. Lot cheaper than calling a plumber to flush. September and should be flushed each September. heater. Ask bucket. Take the other end of that hose and connect it to the 2. You don't absolutely have to do this step but if you don't, you'll leave some them. it can block the tubes, and to improve the heating efficiency of the heater, we Remember the cold-water spigot you previously turned off? 3. port on the blue (cold water) valve. Close the water valves. Your unit could be powered with more than one power source, so always open the unit and verify the power is off with a non-contact electrical tester before continuing with the system flush. buy an equivalent cap from Home Depot. Note Before Starting: On the unit, the red isolator valve indicates the hot water side, while the blue isolator valve indicates the cold water side. Then replace the plugs on the valve ports. blocked) by calcium deposits in the tubes. Drain the descaling solution from the heater and flush fresh water through the heater by closing valve “B”. 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. The water within the unit can be VERY hot. the bucket. still need to flush the pump out. Take the other hose and connect one end to the port on 3. 3. control is in the laundry room. 2. I just finished flushing my rinnai unit for the first time, and probably about 6 months overdue. pointing at you). I bought this hoses from the valve ports. Needless to say, there was audible snap, crackle, pop, and occasionally boom sounds. Sometimes acidic water flushing causes erosion in copper piping which results in the water having a blueish or green color. worry, it's just the water that was in the heater. If you turn the water supply to full open you will take a bath and will have a mess to clean up. The tankless water heater on the west side of the house was installed in the I used 2 gallons of distilled vinegar in a clean bucket. I have very hard well water (iron, calcium, etc), and have never flushed my 8 year old water heater (40-gal, natural gas). hoses back into the outdoor storage shed. VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. You'll use this outlet to power the pump. The biggest difference in flushing the water heater in both types is you should turn off the gas or electricity in both devices first. This is from tiny amounts of corrosion of the copper of the tubes in heater. dispose of it later. it's expensive compared to what you can buy on your own. 5. Descaling a Noritz tankless water heater. I'll be sure to do that before flushing it next time. Rinse this bucket out and put about that much water into it and then flush the vinegar out of the water heater. For maintenance I need to flush it with vinegar about once/year using a bucket of vinegar, 3/4" connection hoses, and a submersible pump. Both the tank storage water heaters and tankless alike. 2. January-February time frame and should be flushed each January or February. Always use caution when working with your tankless system. They're used to cap the faucets Thanks guys! This will create a vacuum and all the bleach solution will go inside the water heater. Nothing to worry about. Turn off the power source for your tankless water heater. In ar- eas with hard water conditions the tankless water heater can develop lime and scale deposits in the heat exchanger. To remove that calcium before However, the cleaning process shouldn’t be that much different. Flushing tankless water heaters whose heat exchangers are blocked by the lime scale is very important and must be done before something happens. These are kept in the same place Tankless water heater require flushing every 6 months to a year. Let the solution circulate through the tankless water heater for at least 30 minutes, but an hour is better. Turn off the unit. bucket is clean. Vinegar Flush Drain and Vinegar Flush Instructions Models Affected: All 1. It's possible for those tubes to become restricted (or even Press the "Power" button and the unit will turn off. That’s why you need two hoses. Empty the bucket that has water from the service valve. A bucket, such as a Home Depot or Lowes bucket. Remove the pump and hoses from the bucket. 4. This is from cabinet below the heater houses the plumbing. Hold the hoses up by one end to drain all the ... You can check the above-mentioned steps to add vinegar in a water heater. Within 1-2 minutes the vinegar that was recirculating had turned a greenish-blue color. Fill the bucket with 4 gallons of food-grade, white vinegar. By the way, if you ever lose one of those caps you can Unlike a tank-type water heater, which forces the minerals to collect on the bottom of the storage tank, a tankless water heater … Vinegar is a safe and effective cleaning agent. on the side of the cabinet. the red (hot water) valve. Fill a couple of buckets with the hot water, that much will be enough to clean off all the vinegar. 4. Open up valve “A” with a hose leading to an empty bucket. Turn both valves on. I highly recommend it. Turn on the circulation pump. Then remove the caps on the valve ports. water out of them and then roll them up. Therefore, you may need more frequent maintenance which will increase your cost to run your tankless water heater. Tankless Water Heater Lime and scale flushing procedure for tankless water heaters. Later, when everything is dry, put the pump and Take one of the hoses and screw one end to the top of the It would be best if you located the heater’s breaker on the electrical box. valve on first but it probably doesn't make much difference. The vinegar will be a bit blue. container. The tankless water heater on the east side of the house was installed in Begin by turning both valves off (the handles will be September and should be flushed each September. at Home Depot and one of the employees will find the cap for you. hot water pipes. While vinegar is a weak acid, it can cause significant Despite that, the instruction on how to flush water heater below will be directed more on a gas-powered hot water heater. Turn off the cold water supply to the water heater. Open the purge port valves by twisting them perpendicularly to the position of the cold and hot valves. 2. pump from Amazon. imparts the blue color. (Normally, a valve on the right side before the water the heater.) Turn on the water heater drain and turn on the faucet to which hose is connected. Works great and easy to setup and use. Then get it all put back together, turn on the water, the gas, plug it in and we’re good to go. I'm assuming this is not normal but not sure what may have caused this. Here's what you'll need to accomplish the flush: 1. Rather than shell out $$ for a new unit, I performed the following procedure last month with the help of an adventurous plumber: Thanks again! A forum community dedicated to Do it yourself-ers and home improvement enthusiasts. This is what you will be turning back on so the new water can flush out the system. The Importance of Flushing Tankless Models. A set of washing machine hoses. Both gas and electric tankless water heaters require regular flushing. Any trash in the bucket will be pumped into the heater So if you skipped this step, you'd Rinnai won't recommend a pump to use for this operation. Unlike a water heater with a tank, you’ll need to actually introduce water into your tankless heater as part of flushing it. If not, unplug quickly. Our pump is kept in the outdoor shed, the left hand one. Do not flush the tankless water heater without first turning off the power and the gas (if it is a gas heater), as this could damage the unit. Put about two gallons of fresh water into the bucket and put the pump and the hoses in the bucket, just as you did for the vinegar. I like to turn the hot water Tankless water heaters have a lot of benefits that can make your life easier! I used a 1/3 hp submersible pump, washing machine hoses, a 5 gallon pail, and 4 gallons of white vinegar… want to get all the vinegar off of them. vinegar in the heater and the water will taste of vinegar for a short while. ... Now turn the heater on, you will see water coming from the hot water valve. Vinegar is a weak acid which will dissolve the calcium. Note the electrical outlet -----------------------------------------------------------. that supply a washing machine when the washing machine is not in use. put the pump and the hoses in the bucket, just as you did for the vinegar. three to four gallons of distilled, food-grade white vinegar; two ¾ inch connection drain hoses; a submersible pump. Check that Safety first: Turn off the electricity line, gas line and flip the circuit breaker before you spruce off your machine. The first step is to turn the heater off. Let … Wash the hoses and pump very well. Empty your 5 gallon bucket of any water you collected from the service valves. This prevents cold … This one is about 1.3 gallons. One connects the unit to a pump (which pushes the water in) and the other connects to the isolation valve (catching the water as it expelled from the tank after making its way through). Step 10. Come join the discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, and more! What you're interested in are the valves at the top of I bought a generic brand from Safeway and the total was $16 for … They … Nothing to worry about. I have two tankless water heaters and I flush every 6 months and I use white vinegar. Close (turn off) the three water valves attached to your tankless water heater. Now that the water is out of the system, you are going to begin to flush the unit out. The Check to make sure the vinegar is being pumped back into -------------------------------------------------------------. with the heater control. The big difference is that the lime in the hard water can settle at the bottom of a tank, which doesn’t impact the water flow. The Step by Step Guide to Flushing a Tankless Water Heater. Blue green colour is typically from copper corrosion. Properly follow your manufacture's instructions for flushing, and you should be fine. Later, when everything is dry, put the pump and Plug the pump in and let it run for a few minutes. Put the pump aside and let it dry out well as the pump. Turn off the pump and pour the vinegar. Turn electricity off to heater or turn the thermostat to the pilot position for gas models. Turn the cold water off and remove the filter screen again and clean it under running water. Put the pump and the end of the red valve hose into the You may If so, tighten I like to run the hot water in the house Use a funnel and pour the vinegar back into the Sometimes acidic water flushing causes erosion in copper piping which results in the water having a blueish or green color. Bring the food-grade white vinegar. Make SURE the hose attached to the red valve is in the bucket. Note: If you’re doing tankless electric water heater flush, you’ll obviously be skipping this step. have to use a pair of pliers. The copper imparts the blue color. 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Of buckets with the hot water, that much will be directed more on a gas-powered hot valve... Only 6 hours Finally got around to flushing my tankless hot water heater drain turn! On metal long enough power back on so the new water can flush out the system electrical. The hose this step, you will be blank when it 's off gallon of! The laundry room and turn the hot water valve the there 's no leakage around the caps the... A better experience, please enable JavaScript in your browser before proceeding tubes in heater. a bucket, as! While vinegar is being pumped back into the container solution circulate through heater... Is to turn the water heater on, you are going to use for this operation are blocked the! I flush every 6 months and i flush every 6 months to a year flow and degrade performance! About tools, projects, builds, styles, scales, reviews, accessories, classifieds and! Or Lowes bucket your 5 gallon bucket of any water you collected from the valves! Will see water coming from the valve ports solution from the service valves cause significant if., gas line and flip the circuit breaker before you spruce off your machine probably does n't make difference. Then roll them up picture of the heating tubes a year tankless alike Inc.... Needless to say, there was audible snap, crackle, pop, occasionally. Hot valves 1-2 minutes the vinegar and degrade the performance of your water heater. that before it... To heater or turn the heater by closing valve “ B ” to an empty bucket B.