Join Date: Nov 2008
Location: Deale, MD
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Re: Muriatic Acid in holding tank
I've done a fair amount of testing of de-scaling chemicals, both for industrial and sailing head applications, and the most widely available chemical that I liked was CLR.
Hydrochloric acid. Effective. Murder on most metals, and not good for stainless. Requires care, Will destroy nitrile (cracks) and nylon (melts--not just ropes but fittings too). I wouldn't use it unless I was 100% certain there were no nitrile or nitrile parts in the system... and both are common in certain brands.
Lime-a-way. Sulfamic acid. Bad on nitrile (heads other than Jabsco, hoses) and acetal (strainers).
CLR. Lactic acid. Probably the best chemical compatibility and pretty aggressive as well. There is risk to Hytrel and ABS, but I've not seen those in heads.
Vinegar. Weak acetic acid. From what I've seen, this is mostly in your head. Certainly it won't attack established layers. Probably works for folks that flush enough water and use it very regularly... and even then CLR would be more effective and economical, if the does were equivalent. But folks do like their home remedies. They'd be better off using the vinegar and veggy oil on salads.
Always a compromise.
(when asked how he reached the starting holds on a difficult rock climbing problem that clearly favored taller climbers - he was perhaps 5'5")
"Well, I just climb up to them."
by Joe Brown, English rock climber
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