[scottz]

Originally Posted by drsmart

Thanks scottz. I have a pump like that and have replaced the rubber impeller. Was thinking about using the fresh tank overflow. On our trailer, it's a pex tube sticking out from the underbelly. Maybe I'll try that.

No, that tube sticking out from the underbelly is the drain (at least on my trailer). The vent (overflow) is on the side of your trailer, near the water tank. First photo is with vent cover on, second is with vent cover off. Spread the sides of the cover a little and it will slide off.