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Descaler Recommendations


I need to descale my Navien NCB-240 on the heating and hot water sides.

I've been looking around for a good descale fluid.

There is the Hercules Haymaker Tankless Water Heater Descaler and Qwik Descaler.

Would either of those be good?

Any other recommendations?



  • Larry Weingarten
    Larry Weingarten Member Posts: 3,331
    Hi @JoeCap , The only other descaler I commonly hear about is white vinegar. I trust you are using a pump and bucket to pump the fluid from and back to?

    Yours, Larry
  • kcopp
    kcopp Member Posts: 4,441
    I have used vinegar and Haymaker.... Haymaker is a great product. Uses Citric acid to eat through the calcium. That would be my choice.