Originally Posted by P87ross
Its threaded female, looks like NPT not sure yet. I didn't look to see if there's a washer or not, but definitely missing any sort of plug or valve. I'll rummage through my parts bin and see what i can plug it up with.
If it's NPT there it wouldn't necessarily have a gasket. It could be straight pipe thread however, and if so it would need a gasket.
I can post a photo of one tomorrow if that will help.
One thing I might be concerned with is why is water coming out of the tank when the pump is operational. Providing you cap off the drain it seems as if the water tank will eventually fill, something you don't want. That pumped water should go to the faucets and not the tank.