Dick--I haven't tried to pump thru 70' of 1" PVC with my sewer solution (just one more way in which I can't compete with Robbie), but I've used the 28' of PVC pipe I carry with me on one occasion to reach a sewer outlet that was some distance away from the rig. I carry four sections of 7' long 1" PVC with me, which fits easily along one wall of the basement storage cabinet and is much cheaper than buying three extra 9' lengths of rubber hose from Sewer Solution.
Good luck with your dumping effort.
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