On Mon, 8 Apr 2013 16:09:25 -0700 (PDT), Robert
wrote:


It's a complex subject, which most people never learn about until
they have a massive, expensive problem.

That's true too. A friend with a house he bought only a couple years
earlier had trouble flushing the toilet and the plumber told him he
had to dig up his front lawn and put in a new line (I guess plastic
instead of tile) But another friend who lived nearby said he just
called the city and they cleaned their part, and that was the end of
the problem. Of course my friend didn't put dental floss in the
toilet.