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Ken's right.  Even clean water in the wrong places can cause trouble.  If you have clean water flooding your basement or living areas--maybe a water leak from the upper floor, time is of the essence.  Dry it up within 24-48 hours to limit mold growth.  Some of these websites mentioned in my first blog address cleaning it up.

I had focused on the combined sewer issue since I personally went through it and learned the hard way about inspections and what they do not cover!

Tip--a plumber told me that the wax ring beneath a toilet is supposed to be replaced about every 7 years so it doesn't leak.