Hi, I have been reading several of your post and a lot of them are helpful but I want to get specific on my trouble. My master bath is about 15 feet from the washing machine. Our machine overflowed about a month ago and we thought it was going out (10 yrs old) so we bought a new one. Now, when the machine drains out, suds fill up our master toilet. There is also some bubbling in the toilet. Maybe the machine wasn't the problem. Could there be a clog or is the vent clogged? When not doing laundry the toilet seems to flush OK.