Thanks glennjanie. It looks like we are going to be sitting perfect on the correct amount fall for the pipe.
When you said..."That's perfect, mudball! I think you will come out OK on this job." Did you mean that Im ok on the first question as far as on the amount of distance between the top of the pipe and the bottom of the slab ?
Im actually referring to the highest (most shallow) the beginning part of the pipe because after that, the pipe will be dropping deep enough under the slab with plenty of gravel over it to protect it from the slab. Im concerned about the highest part of the pipe. Does that make sense
Sorry if I dont make questions very clear. I would say its because of my lack of experience and/or terminoligy...but Im learning. So 3" is ok ?