Need to clean up an old heater..

[JonC]

What’s a good way to get some hard core calcium deposits off a heater?

[Second Hand Pat]

Try a good, long soak in vinegar.

[ROOK45]

Try a good, long soak in vinegar.

Yup then scrape it off with a razor

[Moon]

I soak mine in diluted muriatic acid. Fifteen minutes the heater comes out clean.

[a volar]

Vinegar will do.

[JonC]

Cool, thanks..

[CliffsDiscus]

You can use Lime-Away

Cliff