Its me again... imagine that... something new to work on.... I noticed this morning that when my dishwasher was draining, I heard gurgles in the bathroom, so I went and checked and there was air bubbling up. Now... for the questions, *i have read the other posts* lol..... but first some answers to things I think you may ask... the dishwasher is not vented under the sink, Its been a while since I have been in the attic to look at the vent pipe, but I want to say 3-4 inches... as a side note... this is the same vent pipe that had water on top of a lip and since I put roofing tar around the ventboot isnt hasnt leaked during all this rain recently as far as I can tell. As a side note... when washer was running last night, I thought that I had heard gurgles, but by the time I decided I really heard it... it was done.... onto the info..... I do have a maple tree in my backyard (2 actually). So, I am assuming that I should go to the roof and check out the vent.... but I really dont know what to do after that... so.. let the information flow and I will get busy.....