Just bought first fifth wheel, Just above the purge valves there's an inlet valve for a hose(threaded) that says "sewer flush". Am I correct in assuming that I should hook a hose there when dumping bl...
You might also want to get into the habit of closing the dump valve, letting a few gallons of water go into the tank, then finally disconnect the hose. This will leave water to slosh around & prevent any solid buildup as you merrily drive along.
Oh yeah, also don't leave the valve open at a CG. Dump at least after a few days.