Well I'll go ahead and revise my question based on what I found. I had approx 120 feet to run this line. 2.5" every 10 feet would be a 30 inch drop overall, plus my starting point I would think has to be at least 6-8" underground. So after finding the tie in point, I don't think it's going to be quite deep enough to pull this off with that long of a run. So my two options I believe are to either go the other way, which would involve chopping up some concrete AND tapping into the city sewer ($$$$), or go the same direction I was going to originally and use a pump. The sewer pump I've found can be bough preassembled in a 30" deep basin meant for underground burial. a 4" inlet and 2" outlet. Again, this is kitchen sink/dishwasher and laundry water only. Pipe those two things into it and run pipe out of the discharge around and tie in to the sewer. Cap off the old drains. Cut vent pipe in the wall, cap it off, and tie new lines back into it (it goes out the roof). My question: Will deep freezes make this system inoperable or will each cycle of the pump empty the basin??? The pump I found will pump water 18 feet straight up. It does not specify how far horizontally it will go. I will try and keep the pipe as level as possibe. Should I run 2" pipe all the way around to increase the pressure in the pipe? I'm not sure if this pump with each cycle will be able to completely flush out the line or not. What do you guys think?
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