Lochinvar Noble cleaning

Le John

Hope all of you are well. I want to clean the water side of my Noble NKC and Lochinvar recommends using a 5% vinegar Solution. Isn’t the vinegar harmful to the pumps. Is there any other solution you would recommend?

hot_rod

The domestic water side of the combi? If so use the acid they sell for flushing tankless water heaters.

If you have isolation flush valves the cleaner only goes through the HX.
These kits are handy if you plan on deliming yearly.

Le John

thank you @hot_rod. Yes I have isolation valves and a flushing station.