Hello sir, I want to move my exsisting toilet drainage pipe to the other side of my bathroom. the place I want to connect the pipe is about 6 to 7 feet away from the main drainage line. I am wondering if I can just simply run pvc, horizontally, 7 feet across underneath the floor boards or if their is a slope variable/plumbing restriction that I must follow when laying the pipe. any help would be much appreciated. my e-mail address is robin_r_h@msn.com