Is water's blue tint really being caused by chloride? - Page 2

Water analysis, treatment, and mineral recipes for optimum taste and equipment health.

Postby miamichillin99 » Apr 13, 2019, 5:33 pm

If I run enough water through the grouphead it will eventually come out clear. After about 8-12 oz. its clear. once I let it rest for a while the water starts coming out blue again. Any tips. Should I descale just the heat exchanger some more to clean whatever is causing the blue? In my previous post the blue scale on the connector was on the connector going to the heat exchanger. I have a feeling this is the culprit. I like the snake camera idea. Maybe ill buy one to peek into the heat exchanger.

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Postby homeburrero » Apr 13, 2019, 8:21 pm

miamichillin99 wrote:Should I descale just the heat exchanger some more to clean whatever is causing the blue?

I would not recommend that. Suppose the blue is associated with copper in sulfate deposits - the acid would not dissolve that and you would be risking more corrosion for no reason.

What I might try instead would be to go through a long descaling procedure, but instead of descaling solution use purified water spiked with a tiny amount of protective bicarbonate buffer. About 0.3 - 0.4 gram of sodium bicarbonate (baking soda) per gallon of distilled would be good. That would dissolve sulfate as effectively as a harsh acid solution but would be harmless to the machine. Can't hurt and may help.
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Postby miamichillin99 » Apr 14, 2019, 10:54 pm

Well I tried the baking soda solution and it didnt work. Actually it made the water a strong green blue again. Now it has subsided back to a faint light blue tint after a lot of flushing. I did use 10g per liter as was the recommendation in the blue water thread posted earlier.


Postby miamichillin99 » Apr 20, 2019, 3:34 pm

Im happy to report that after flushing with 5 liters of 10mg/liter the water finally turned from green to a light yellow. I let it sit with bicarbonate water for at least 8 hours at operating temp with every 15-30 mins pumping fresh bicarbonate water through the group. So I took this as a good sign and started flushing with tap water until it came out completely clear. Finally the metallic smell and taste is gone too. I will not descale for a very very long time. Thank you all for your help!!! This forum rocks!!!


Postby OldNuc » Apr 21, 2019, 9:40 am

I use nothing but true steam distilled water and potassium bicarbonate in the R. Pavlis recommended concentration. Scale is not an issue ever. If the coffee tastes bad fix the coffee, not the water.

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Postby hankbates » Apr 22, 2019, 8:56 am