"TomR" wrote in message
...

I am going to meet with a friend of mine in a couple of hours to see if I
can help him with a clogged/slow drain issue. . . . But, I was wondering
if anyone has ever tried using acid . . .

If your hardware store has more than one type of acidic drain
cleaner, it should be able to explain the difference. Muriatic
acid (dilute hydrochloric acid) seems to be the most common.
You may wish also to consider whether the drain pipes are
metal or plastic or ceramic (each of which responds differently
to various acids, resisting some but not others.)

--
Don Phillipson
Carlsbad Springs
(Ottawa, Canada)