My driveway goes to a side entry garage, with my septic tank located at mid-point of garage along the adjacent front wall offset about 10’ from the house. If I back the RV to that corner of the driveway, the dump outlet is about 25’ from the inlet clean-out to the tank. Grade is about 2-3% uphill towards the clean-out. So how to dump?
A “Sewer Solution”. I’ve got a hose bib on the other side of the garage doors, and a double length of Sewer Solution hose connected together is plenty to get from connection to clean-out. Water power handles the slope fine. And no construction needed.