I have a question about my pvc venting pipe that goes to the roof.... I have a roof leak.... I put roofing tar around the roof vent on the top of the roof until I could get someone to go up inside the attic with me (i'm a big girl... didnt think going up there alone was a good idea...) today, we went up into the attic and it happened to be raining so that was even better ( I tarred it a week ago). so, no active leaking right now... woohoo.... the wood isnt even wet.. but it will have to be replaced when i put the new roof on.... so anyways.... the pvc pipe.... it has 2 couplings, on the lower coupling, water is sitting around the lip of it and dripping off onto the ceiling below.... I just am not understanding how water is on top of the sanitary tee you cannot feel moisture on any of the pipes above it... and I know that water doesnt just float up.... so.. what am I missing? there is caulking on the other joints... but not at this one... but I really am at a loss.... I felt all the way around the pipes, didnt feel any moisture.... please tell me that I am just being silly becuase I dont understand how water could be here..