What chemicals for coil descaling?

1

Hello folks.

I recently bought a spare hot unit. Guy who sold it told me it needs descaling. What chemicals does everybody use to descale the coil innards?

Thanks.

2

Muriatic acid.

3

@DisplacedTexan Do you add any inhibitors to the acid to prevent rust?

4

Nope just flush with fresh water for about 30 minutes afterwards. It’s going to rust no matter what you do unless you have a stainless coil.

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5

@DisplacedTexan What kind of concentration do you use?

6

2:1 water to muriatic should be fine. Let it circulate for a good 10 minutes or so then flush for 30 with fresh water. I suggest putting a screen filter on the intake hose so that you’re not sucking the debris right back into the system.

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7

Descaling is the quickest way to find a leak in your coil. It’s like a transmission, if you haven’t serviced it before 75k miles, never service it.

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8

My lawn mower at home gets a few drops added every half decade if i don’t forget. Never changed only topped up. My buddies think I’m joking around, I even show them the sludge. Some things just shouldn’t be messed with.

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