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Descaling a Noritz tankless water heater

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Uploaded by on May 20, 2011

Specific instructions for descaling a Noritz N-0841 / N-0842 / NRC-111 DV tankless water heater. Bonus feature includes how to make your own descale kit.

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Uploader Comments (Essanaye)

  • How about running CLR through the flushing process, then clean water afterwards to flush out the CLR?

  • @ForcedAgenda

    As I mentioned in the video, I don't recommend CLR because it isn't food grade. Here in the Pacific Northwest, we have excellent water quality and therefore distilled white vinegar is fine for the task. If you live in an area where water quality is poor, then you may want to use that product. If I were to use CLR, I would make sure and flush the water heater for at least 5 minutes after the descaling is completed and BEFORE you put the heater back in service.

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  • Great, thorough instructions. Thank you for the important detail about keeping the unit ON considering everyone else says to turn it off. This is YouTube is all about!!

  • Amazingly wonderful instructions. I just completed this task today and am really really thankful to you for all the small details. God bless.

  • You're the only one I found that said to leave the unit powered on. I just had a class on Noritz and they said power needs to stay on and just gas off so that the bypass valve in the unit opens up so you flush the complete system.

  • awesome tutorial. just wanted to say thanks steve. I am a second year plumbers apprentice down here in california, and I totally used your video with great success.. again thanks for being so clear about everything..

  • Thank You,real nice video, glad you took the time to teach, you should do more, your a natural teacher

  • Very helpful. Thank you.

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