An oldie but goodie trick is to use this stuff to clear out clogged plumbing. I have plastic pipe to my plumbing on the house so once in a while [blue moon]I will use it to make a drain drain more better.
It is said that the stuff is bad on old still pipes [plumbing] I always got away with it tho. After the clog went away which happens usually immediately I would thoroughly rinse out the pipes.
I still see rust on them parts
I here you tho
Can I Use Muriatic Acid to Unclog a Drain? | eHow.com
Hydrochloric acid - Wikipedia, the free encyclopedia
Can be diluted too just add water.