After 4.5 years of not being annually flushed (previous owners didn't do it) I had quite a bit of gunk and the vinegar turned slightly orange. Super easy to do this procedure. Thank you for posting this. Saved me quite a bit of money.
Just want to say thank you to Noritz for publishing videos like this. Had a unit throwing an E11 code and descaling it myself resolved it and saved hundreds if not thousands of dollars.
For me, plumber to descale: $150. Complete kit from plumbing supply store: $160. I watched UA-cam videos then watched and videotaped the plumber. It wasn't so hard, but I was still nervous.
This was an exact replacement for the old one that lasted about 10 years. ua-cam.com/users/postUgkx7yWIKcrbA9KMHkGSfcgxW2lsjHT6B8Sh The top of my mitigation tube by my roofline was just a 90 elbow which allowed too much debris to fall down into the fan, eventually ruining it. Without this issue, I bet it would have kept running another 10 years. When I replaced this fan, I added an extra elbow joint so the top tube now it does a 180, which should solve that problem. The radon guys around here wanted to charge me a $300 diagnostic fee, then parts/labor (probably close to $600 total). I installed this all by myself in about an hour for the cost of the fan; it would probably be even easier/faster with two people. FYI the manufacturer's warranty greatly differs depending on whether you install it yourself (1 yr warranty) or have a licensed installer do it (10 yrs).
Thanks for these tech tip videos. Super helpful for us DIY’ers. Did this for the first time on my 8 year unit which came with my home. Vinegar solution was greenish blue for the first 30 minute cycle, and stayed mostly clear on the 2nd flush cycle. My hot water valve was pretty tough to twist, and I had little leverage to get to it. I ended up taking a long screw driver and hammer to get it moving.
Useful hint in case your pump seems not to be moving any vinegar:- At 0.59 seconds, when removing the drain caps, each cap has a solid washer that should stay with the cap. The first year I followed these instructions the washers did just that and the descaling went very smoothly. The following year the cold cap's washer did not stay with the cap but stuck to the male thread, blocking the flow from the pump. It stayed stuck there when I disconnected the hose to see if the pump was working. The pump was working fine and I did not notice the washer stuck to the male thread. After wasting an hour with all sorts of tests, I was about to buy a more powerful pump but on the last hose disconnection the washer jumped to the female hose connector and was pushed out on the next pump test. Duh! The washer is now back in its drain cap and the vinegar is flowing freely.
Great how to video. Followed it exactly. Used new vinegar after 30min flush for max benefit. Only needed 3 gallons total for both cleanings. Lots of junk flushed out. My heater is 10 years old and I have never flushed it, only cleaned the filter every couple of years.
Following all your instructions and everything was going good but the timer got to C58 and it wouldn’t go down anymore after a few minutes of waiting. So I unplugged the pump and took out the filter below the water heater and cleaned it out(it was very dirty) and put it back in then plugged back in the pump and the timer started going down. Im pretty sure the filter was causing this issue because now it’s doing exactly what your video says. Thank you for this video.
Probably a silly question, but is there a reason the system is left on instead of turning it off before doing everything, and turning it back on at the end?
I have two Noritz water heaters connected to each other. What is the process for flushing these as I recall there is an extra step with the wiring to flush the 2nd one? Thanks.
This has probably never been done in 14 years since the tankless water heater was installed and we have hard water here. Having some issues where the water turns cold after a few minutes. How do you do this descaling process when you have no isolator valves?
I am going to do this for the first time since it was installed March 2020. I see there is cleaning vinegar and regular vinegar on the store shelves. Regular vinegar is 5% acidity, cleaning vinegar is 10% acidity. Which one should I use for once a year flush
As a professional in the industry, I use white vinegar off the grocery store shelf. Don’t over think it. Under normal operation, normal circumstances, regular maintenance, white vinegar does the job. There’s always that one extreme case but my rule of thumb is, if I won’t drink it, I will not inject it into a domestic water system.
@@crushingsnakes1976 Thats what I did. Although I did buy the cleaning vinegar for other random cleaning in the future. before this I didnt know there was cleaning vinegar
The previous owner of the house never flushed the unit for 6.5 years. So i went to flush it and it caused leaking in the unit. I had to replace the whole thing. I opened up the broken unit and found out it was all rusted inside and parts just broke when I went to flush it. My 2 cents would be if the unit was never flushed in years it is probably wise to let it be until it breaks and start afresh with a new tank. Also I used a 1/4 hp pump to flush it which has water flow rate of 2000 gph. Correct me if I am wrong because I dont know much about water flow rate and how it affects the heater. I know on an average house the water flow rate through the piping is about 360 gph. I dont know if the higher gph of the pump has anything to do with breaking it. Anyway i use aquarium tank pump now that has a gph of about 300 to 600 which I can control. No isuues in last 5 years so far.
Every 2 years I do this. What amazes me is how dirty the filter gets. And our water is voted as some of the best tasting waters in the world Victoria BC Canada. Very low mineral count, for some beers I brew have to add minerals.
I just cleaned my unit and realized I forgot to clean the water filter. How much gunk are people seeing in their water filters? Also, I was surprised that the vinegar coming out was clear after 4 years of use. We have a water softener tank that gets replaced every 2 weeks, so that may have something to do with it.
Hi, Do you have an updated Video for GQ-2457WS-FFA NG? In your manual you say use a Calcium, Lime, Rust Removal Product, but this video says use Vinegar. Which one to use? Also i called my plumber, he said to turn off the unit, but your documentation says keep the electricity one, but turn off the gas. Wouldn't this cause heating of the vinegar and mess up the exchanger?
Why Noritz installation manual recommends CLR? Because annual vinegar job is a guess work. Noritz unit has a descale maintenance sensor, so you do the maintenance only when the error code appears. No more guessing. Also, when using diluted CLR be sure the submersible pump is corrosion resistant.
Great point about the pump! I've never seen this point made before. But it makes sense -- because you could be wrecking your pump but ALSO putting more scale back into the tankless than you took out.
I was told to use undiluted vinegar which has a 30% acidity as opposed to food grade which is at 5%. I’ve purchased all materials but I haven’t started yet. Should I go with food grade?
Trying to do a flush as shown and the pump will not push the solution out back into the bucket. is there an internal on/off valve inside the unit? it is as though there is an internal blockage however the unit heats and runs fine. What is disallowing solution to cycle? I have all the valves set as shown in video. I know there is pressure because solution is leaking out of the drain/screen plug which is temporarily seated.
@@jordanveverica6696Thanks. I found the outlet ball valve was broken in the ON position and could not be diverted. At some point I need to take the whole thing apart to get in there and splice a new matching valve in 😕
My bucket tends to fill with water over a few min, I have to bail out water to keep it from overflowing. I have both cold & hot water supply turned off as shown at 0:54.
The video doesn't say to turn off the water supply before draining the condensate, but I think you are supposed to. Does it matter? Can someone at Noritz comment on this? Thanks.
Our apologies we are working toward creating an updated video. Yes, we do recommend to shut off the supply water going into the heater before draining the condensate and the remaining water in the heater when attaching the water drain hose. If the water supply to the heater is not shut off it will result in water flowing in and out of the heater as you open the drain valves.
@@noritzamerica Have you made a new video? I searched and can't find one. I see in comments that you no longer recommend vinegar, is that true? How often should this service be done? Is there a indication (ie taking longer for water to get hot) that would let home owners know it's time? Thank you!
We just did the flush for 30 minutes and stop to see if there were some settlement at the bottom of the bucket? Yes there were some, but when we restart it the process very litel water came out of the hot water valve? So, once again we restarted the process but still very little water pressure was coming out of the hot water valve? Any ideas?
Is this same procedure for all brands of tankless water heaters? How much does a technician charge to do this, and how long? If a unit had not been flushed for a few year, do we need to do more steps, and more time? Please provide links for new videos.
This procedure is not the exact same for all tankless but it's very similar with some small variations. We recommend following the manufacturer's instructions. As for servicers to do this it all ranges just like a car mechanic's pricing would depending on the shop. If it hasn't been flushed in some time you can let it run a little longer
I have a recirculation pump on my Noritz tankless water heater. When I went to flush it I turned off the recirculation pump and followed all steps. I could not get the pump to pump water through the system. Either it is really plugged or I need to turn on the recirculation pump. The heater works fine but I bought the house and have no idea if the previous owner did any maintenance on it. I op-checked the pump and it works fine. Do you have any suggestions?
budmanjer I had the same issue just tonight, I pulled the filter several times so the unit would try to fire up. Once it set the code 11 it flowed water through it just fine.
Depending on your model you may need to turn up the temperature to 140 degrees to open the heaters bypass valve. Once the valve is open it will allow your external pump to flow water through the heater.
no, warranty will not be voided by doing your own maintenance. Generally it should be done once a year in areas with hard water but you should check the owners manual on support.noritz.com for water treatment guidelines.
I’ve used vinegar in the past, and it seemed to do the trick just fine. I just bought CLR for the next flush (couple years later) because my brain automatically decides that “stronger is better”, but I remembered that my family will be DIRECTLY exposed to whatever I “flush” the system out with-even if just a little bit…..and so I’ll stick with the food grade vinegar as apposed to the (whatever) chemicals in CLR. The family’s health trumps my need to CRUSH the calcium build up very quickly. Good luck!
Thank you for bringing this to our attention. We'll work towards answering all question to the best of our ability. If you have a question or request please let us know, thank you.
@@noritzamerica Could Noritz just make a new video? I know you don't like to put too much in writing, but a new video would help recent buyers like myself keep their units running well and to avoid your having to process warranty claims. We shouldn't have to call into your offices and sit on long holds or wait for a return call to get verbal answers while a pandemic is going on. A new video or set of videos would be SO helpful. FWIW, I have the GQ-C3259WX-FF. Thank you!
This video’s description says “The PDF files below are the new descaling procedures.” But the links shown there are now wrong (because I think they rebuilt their website in 2021). The correct links are: Descale Procedure Group A Zone II help.noritz.com/wp-content/uploads/2021/07/descale_procedure_group_a_zone_ii_copy1.pdf Descale Procedure Group B Zone III help.noritz.com/wp-content/uploads/2021/07/descale_procedure_group_b_zone_iii_copy3.pdf Descale Procedure Group C help.noritz.com/wp-content/uploads/2021/07/descale_procedure_group_c_copy2.pdf
Why Noritz recommends CLR? Because annual vinegar job is a guess work. Noritz unit has a descale maintenance sensor, so you do the maintenance only when the error code appears. No more guessing. Also, when using diluted CLR be sure the submersible pump is corrosion resistant.
Yeah, that's confusing. Because they told me vinegar is okay, just a month ago. In all fairness, when I asked them about other acceptable descaling solutions, Noritz also did say that a half CLR and half water solution is recommended as well. Does that mean if you use vinegar they won't honor failures due to condensate under the warranty?
Dave Lindsay The video is correct. The only time you turn the power OFF is when you're all done. Turn off control panel for 10 to 20 seconds to reset it.
Well, you're probably done by now Cyrus, but for others, I called Noritz and they said a 1/3 hp submersible pump. I picked one up for $65.00 plus tax. It's 900 gallons per hour.
I live here in California. We have water restrictions here. I disagree with 20 gallons of water in the final flush. I got by with 5 gallons of water. Basically, filling 1 bucket. When using vinegar, I don't think you need 20 gallons.
Had that same issue. Home Depot (and probably most hardware stores of size) sells the isolation valves together in kits if you need immediately. Otherwise you can find on eBay, etc online sites. I didn't get a Nortiz kt per se, and got a 'generic one, which works the same way. The kit I got was 110.00 at HD cause I needed it right away. I'm pretty sure you can do without it... but a total pain... and its worth the money to get the kit, as you should do this yearly. IF you don't get the valves, I'd imagine if you turned off water, connected the hoses directly to the 3/4 fitting coming directly out of the heater at the bottom and ran it that way, you could do the same thing...
After 4.5 years of not being annually flushed (previous owners didn't do it) I had quite a bit of gunk and the vinegar turned slightly orange. Super easy to do this procedure. Thank you for posting this. Saved me quite a bit of money.
Just want to say thank you to Noritz for publishing videos like this. Had a unit throwing an E11 code and descaling it myself resolved it and saved hundreds if not thousands of dollars.
Great job!
Thanks for the video.
Descaling kit. $209.00
Profit on the job $368.00
The free knowledge...... Priceless 👍🏻😎
So you've done this process?
For me, plumber to descale: $150. Complete kit from plumbing supply store: $160. I watched UA-cam videos then watched and videotaped the plumber. It wasn't so hard, but I was still nervous.
Total price you charge or should be charged 209+368? Is $150 average service fee?
Me doing it. Fifty dollar pump. Ten dollar hoses. Ten dollar vinegar. Saved five hundred from getting robbet by u and noritz
This was an exact replacement for the old one that lasted about 10 years. ua-cam.com/users/postUgkx7yWIKcrbA9KMHkGSfcgxW2lsjHT6B8Sh The top of my mitigation tube by my roofline was just a 90 elbow which allowed too much debris to fall down into the fan, eventually ruining it. Without this issue, I bet it would have kept running another 10 years. When I replaced this fan, I added an extra elbow joint so the top tube now it does a 180, which should solve that problem. The radon guys around here wanted to charge me a $300 diagnostic fee, then parts/labor (probably close to $600 total). I installed this all by myself in about an hour for the cost of the fan; it would probably be even easier/faster with two people. FYI the manufacturer's warranty greatly differs depending on whether you install it yourself (1 yr warranty) or have a licensed installer do it (10 yrs).
Great video! Going on ten years of using a Noritz Tankless System. We love it 👍
Thanks for these tech tip videos. Super helpful for us DIY’ers.
Did this for the first time on my 8 year unit which came with my home. Vinegar solution was greenish blue for the first 30 minute cycle, and stayed mostly clear on the 2nd flush cycle.
My hot water valve was pretty tough to twist, and I had little leverage to get to it. I ended up taking a long screw driver and hammer to get it moving.
To do this, do we need 4 gallons of food-grade vinegar without mixing with water?
@@wlit Yes, just vinegar. I didn’t mix it with water.
Useful hint in case your pump seems not to be moving any vinegar:-
At 0.59 seconds, when removing the drain caps, each cap has a solid washer that should stay with the cap. The first year I followed these instructions the washers did just that and the descaling went very smoothly.
The following year the cold cap's washer did not stay with the cap but stuck to the male thread, blocking the flow from the pump. It stayed stuck there when I disconnected the hose to see if the pump was working. The pump was working fine and I did not notice the washer stuck to the male thread.
After wasting an hour with all sorts of tests, I was about to buy a more powerful pump but on the last hose disconnection the washer jumped to the female hose connector and was pushed out on the next pump test. Duh!
The washer is now back in its drain cap and the vinegar is flowing freely.
Great how to video. Followed it exactly. Used new vinegar after 30min flush for max benefit. Only needed 3 gallons total for both cleanings. Lots of junk flushed out. My heater is 10 years old and I have never flushed it, only cleaned the filter every couple of years.
Tip: Attach the hoses before draining. Makes it easier to hit the bucket.
Alex Jones was here!
Lol 😆 I wish I would have read this comment before draining the tank 😅
Excellent tip.
God bless fellers like you!
Following all your instructions and everything was going good but the timer got to C58 and it wouldn’t go down anymore after a few minutes of waiting. So I unplugged the pump and took out the filter below the water heater and cleaned it out(it was very dirty) and put it back in then plugged back in the pump and the timer started going down. Im pretty sure the filter was causing this issue because now it’s doing exactly what your video says. Thank you for this video.
Thank you for a very clear video of how to do this service. I will try it on my unit. Happy New year!😊
Great video! Great reference for the DIY people 👌
Probably a silly question, but is there a reason the system is left on instead of turning it off before doing everything, and turning it back on at the end?
Thanks. Very helpful.
Spill bucket of vinegar in closet. Hide from wife.
Did you try spilling more
Easy process! Thanks!
Is there a video explaining the difference with the plumbing connections on the top of the unit?
I just flushed out my Noritz water 💧 heater, thanks for the video very helpful 👍
Thanks for your sharing 👍
Any suggestions on a pump to use? Horsepower? GPM?
Thanks in advance
1/6 hp
I have two Noritz water heaters connected to each other. What is the process for flushing these as I recall there is an extra step with the wiring to flush the 2nd one? Thanks.
This has probably never been done in 14 years since the tankless water heater was installed and we have hard water here. Having some issues where the water turns cold after a few minutes. How do you do this descaling process when you have no isolator valves?
Great detailed video, mine drained discharge water was turquoise 😱
I am going to do this for the first time since it was installed March 2020. I see there is cleaning vinegar and regular vinegar on the store shelves. Regular vinegar is 5% acidity, cleaning vinegar is 10% acidity. Which one should I use for once a year flush
As a professional in the industry, I use white vinegar off the grocery store shelf. Don’t over think it. Under normal operation, normal circumstances, regular maintenance, white vinegar does the job. There’s always that one extreme case but my rule of thumb is, if I won’t drink it, I will not inject it into a domestic water system.
@@crushingsnakes1976 Thats what I did. Although I did buy the cleaning vinegar for other random cleaning in the future. before this I didnt know there was cleaning vinegar
@@crushingsnakes1976 ijidooqu7iiee8oe73cjjk😮😈
The previous owner of the house never flushed the unit for 6.5 years. So i went to flush it and it caused leaking in the unit. I had to replace the whole thing. I opened up the broken unit and found out it was all rusted inside and parts just broke when I went to flush it. My 2 cents would be if the unit was never flushed in years it is probably wise to let it be until it breaks and start afresh with a new tank. Also I used a 1/4 hp pump to flush it which has water flow rate of 2000 gph. Correct me if I am wrong because I dont know much about water flow rate and how it affects the heater. I know on an average house the water flow rate through the piping is about 360 gph. I dont know if the higher gph of the pump has anything to do with breaking it. Anyway i use aquarium tank pump now that has a gph of about 300 to 600 which I can control. No isuues in last 5 years so far.
Flushing is great and necessary, but you should always use a prefilter on any
Tankless water heater.
What’s a pre filter?
beautiful - i conveniently already have a small underwater pump for a halloween decoration i do every year, just need the hoses and i'm good!
Every 2 years I do this. What amazes me is how dirty the filter gets. And our water is voted as some of the best tasting waters in the world Victoria BC Canada. Very low mineral count, for some beers I brew have to add minerals.
I just cleaned my unit and realized I forgot to clean the water filter. How much gunk are people seeing in their water filters?
Also, I was surprised that the vinegar coming out was clear after 4 years of use. We have a water softener tank that gets replaced every 2 weeks, so that may have something to do with it.
Hi, Do you have an updated Video for GQ-2457WS-FFA NG? In your manual you say use a Calcium, Lime, Rust Removal Product, but this video says use Vinegar. Which one to use? Also i called my plumber, he said to turn off the unit, but your documentation says keep the electricity one, but turn off the gas. Wouldn't this cause heating of the vinegar and mess up the exchanger?
@@dansynth8408 Great tip.
Note to self: turn off water pipe as well. The white handle on the left.
Why Noritz installation manual recommends CLR? Because annual vinegar job is a guess work. Noritz unit has a descale maintenance sensor, so you do the maintenance only when the error code appears. No more guessing. Also, when using diluted CLR be sure the submersible pump is corrosion resistant.
Great point about the pump! I've never seen this point made before. But it makes sense -- because you could be wrecking your pump but ALSO putting more scale back into the tankless than you took out.
Less of a concern if you just play it safe and use vinegar rather than the more acidic solutions that you still have to dilute pretty substantially...
What about closing the servo-bypass valve? I called and was told to do that in a complicated procedure.
What did you find out, end up doing?
I was told to use undiluted vinegar which has a 30% acidity as opposed to food grade which is at 5%. I’ve purchased all materials but I haven’t started yet. Should I go with food grade?
I have flushed the unit 3 times and use only food grade vinegar
Trying to do a flush as shown and the pump will not push the solution out back into the bucket. is there an internal on/off valve inside the unit? it is as though there is an internal blockage however the unit heats and runs fine. What is disallowing solution to cycle? I have all the valves set as shown in video. I know there is pressure because solution is leaking out of the drain/screen plug which is temporarily seated.
If it is a Noritz, make sure the unit is powered on. The bypass will close if it is turned off.
@@jordanveverica6696Thanks. I found the outlet ball valve was broken in the ON position and could not be diverted. At some point I need to take the whole thing apart to get in there and splice a new matching valve in 😕
You can do this while it's on. Probably better to do it while it's heating the blades.
The instructions do not apply to all Noritz tankless water heaters.
My bucket tends to fill with water over a few min, I have to bail out water to keep it from overflowing. I have both cold & hot water supply turned off as shown at 0:54.
where does the confirmation of MM60 display from?
Can I use industrial cleaning vinegar
all-purpose
The video doesn't say to turn off the water supply before draining the condensate, but I think you are supposed to. Does it matter? Can someone at Noritz comment on this? Thanks.
Our apologies we are working toward creating an updated video. Yes, we do recommend to shut off the supply water going into the heater before draining the condensate and the remaining water in the heater when attaching the water drain hose. If the water supply to the heater is not shut off it will result in water flowing in and out of the heater as you open the drain valves.
@@noritzamerica Have you made a new video? I searched and can't find one. I see in comments that you no longer recommend vinegar, is that true? How often should this service be done? Is there a indication (ie taking longer for water to get hot) that would let home owners know it's time? Thank you!
We just did the flush for 30 minutes and stop to see if there were some settlement at the bottom of the bucket? Yes there were some, but when we restart it the process very litel water came out of the hot water valve? So, once again we restarted the process but still very little water pressure was coming out of the hot water valve? Any ideas?
If it is a Noritz, make sure the unit is powered on. The bypass valve won’t open if the unit if off.
Is this same procedure for all brands of tankless water heaters? How much does a technician charge to do this, and how long?
If a unit had not been flushed for a few year, do we need to do more steps, and more time?
Please provide links for new videos.
This procedure is not the exact same for all tankless but it's very similar with some small variations. We recommend following the manufacturer's instructions. As for servicers to do this it all ranges just like a car mechanic's pricing would depending on the shop. If it hasn't been flushed in some time you can let it run a little longer
@@noritzamerica Thx
I have a recirculation pump on my Noritz tankless water heater. When I
went to flush it I turned off the recirculation pump and followed all
steps. I could not get the pump to pump water through the system. Either
it is really plugged or I need to turn on the recirculation pump. The
heater works fine but I bought the house and have no idea if the
previous owner did any maintenance on it. I op-checked the pump and it
works fine. Do you have any suggestions?
budmanjer I had the same issue just tonight, I pulled the filter several times so the unit would try to fire up. Once it set the code 11 it flowed water through it just fine.
Depending on your model you may need to turn up the temperature to 140 degrees to open the heaters bypass valve. Once the valve is open it will allow your external pump to flow water through the heater.
@@noritzamerica Interesting; my NRC95 won't go above 120; how do I get it to go "up to 140" to open the bypass valve?
If i do this myself, will this void the warranty of the unit? How often should this be done?
no, warranty will not be voided by doing your own maintenance. Generally it should be done once a year in areas with hard water but you should check the owners manual on support.noritz.com for water treatment guidelines.
Can I use CLR to flush my Noritz water heater?
I’ve used vinegar in the past, and it seemed to do the trick just fine. I just bought CLR for the next flush (couple years later) because my brain automatically decides that “stronger is better”, but I remembered that my family will be DIRECTLY exposed to whatever I “flush” the system out with-even if just a little bit…..and so I’ll stick with the food grade vinegar as apposed to the (whatever) chemicals in CLR. The family’s health trumps my need to CRUSH the calcium build up very quickly. Good luck!
Why does the pre filter have to installed dry again?
Greetings Noritz America, I had a NR-98-OD installed without a controller, how could I change temperature setting?
Great to see they made a video yet don't bother to answer any questions or comments people make?
Thank you for bringing this to our attention. We'll work towards answering all question to the best of our ability. If you have a question or request please let us know, thank you.
@@noritzamerica Could Noritz just make a new video? I know you don't like to put too much in writing, but a new video would help recent buyers like myself keep their units running well and to avoid your having to process warranty claims. We shouldn't have to call into your offices and sit on long holds or wait for a return call to get verbal answers while a pandemic is going on. A new video or set of videos would be SO helpful. FWIW, I have the GQ-C3259WX-FF. Thank you!
Hi @@bormit24 , it is now in the works with our team. Keep an eye on our UA-cam / Social pages for the updated video coming soon.
This video’s description says “The PDF files below are the new descaling procedures.” But the links shown there are now wrong (because I think they rebuilt their website in 2021). The correct links are:
Descale Procedure Group A Zone II
help.noritz.com/wp-content/uploads/2021/07/descale_procedure_group_a_zone_ii_copy1.pdf
Descale Procedure Group B Zone III
help.noritz.com/wp-content/uploads/2021/07/descale_procedure_group_b_zone_iii_copy3.pdf
Descale Procedure Group C
help.noritz.com/wp-content/uploads/2021/07/descale_procedure_group_c_copy2.pdf
I just called Nortiz. They now recommend 2 gallons of CLR and 2 gallons of water. They no longer recommend vinegar.
Why Noritz recommends CLR? Because annual vinegar job is a guess work. Noritz unit has a descale maintenance sensor, so you do the maintenance only when the error code appears. No more guessing. Also, when using diluted CLR be sure the submersible pump is corrosion resistant.
Yeah, that's confusing. Because they told me vinegar is okay, just a month ago. In all fairness, when I asked them about other acceptable descaling solutions, Noritz also did say that a half CLR and half water solution is recommended as well. Does that mean if you use vinegar they won't honor failures due to condensate under the warranty?
The video says to keep the unit plugged in and powered on but the PDF says to unplug from power. Which is correct?
Dave Lindsay The video is correct. The only time you turn the power OFF is when you're all done. Turn off control panel for 10 to 20 seconds to reset it.
sonpit what is the size of pumps and lines?
Well, you're probably done by now Cyrus, but for others, I called Noritz and they said a 1/3 hp submersible pump. I picked one up for $65.00 plus tax. It's 900 gallons per hour.
And I used short garden hoses.
Oh dear, I got a 1\4 hp per my plumber that showed me how to do it two years ago. So you think this will be ok??
Noritz Combi boilers have 2 sets of hot and cold .
What is the process for combi boilers' descaling??
What is the right procedure for this?
Hi There is there a video showing how to diagnose and repair a error code 66 on a noritz thankless water heater. Any help will be appreciated.
Any update?
I live here in California. We have water restrictions here. I disagree with 20 gallons of water in the final flush. I got by with 5 gallons of water. Basically, filling 1 bucket. When using vinegar, I don't think you need 20 gallons.
How do you flush unit that does not have the flush connectors?
Had that same issue. Home Depot (and probably most hardware stores of size) sells the isolation valves together in kits if you need immediately. Otherwise you can find on eBay, etc online sites. I didn't get a Nortiz kt per se, and got a 'generic one, which works the same way. The kit I got was 110.00 at HD cause I needed it right away.
I'm pretty sure you can do without it... but a total pain... and its worth the money to get the kit, as you should do this yearly. IF you don't get the valves, I'd imagine if you turned off water, connected the hoses directly to the 3/4 fitting coming directly out of the heater at the bottom and ran it that way, you could do the same thing...
we are getting a code 66