Vinegar, NO, how about Acetic or muriatic acid?

[Myka]

Originally Posted by Chin_Lee

I believe JL's used to sell the crystalized muriatic acid to clean clacified pumps and hardware. i can't find it on their website now but it was highly effective.

Ya, it worked really well. They used it in-store too. I can't remember what brand it was called or the dosing amount.