This system is not designed for use on a fifth wheel with drain pipes under the van. This gearbox should be designed for a bus where the tubes are in a compartment which can then be fed by gravity. If you have a fifth wheel, get a makeshift one with a built in clamp that attaches to your pipe like a hose. For this to work on a trailer like I described it needs to be on the ground for gravity feed. And the hose mount didn't have barb clips, which is why it falls off so easily! And it sucks when your hose is full to feed him and he decides to dump himself. It's not that bad, it pumps 150 feet through a 3/4" hose into my septic tank. But I have 2 black 40 gallon tanks. and it can't get through either without overheating or blowing the fuse. I wish ,I might send it back during the return period.I don't usually leave bad reviews but for my fifth wheel it's a complete flop and a big pain in the heck to drink my tanks.I would order another pump,the all in one is. I hate it!
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