On our 98 Patriot 37', Mine works fine and I use it every year. I winterize it (right or wrong!) by turning it on, opening the output ports and run compressed air through it until the water stops coming out. That has worked for me. Also, I have a couple of Karcher portable power washers and those hoses and fittings work as well. I do find that after ours sits awhile and you try to turn it on that the shaft is often stuck. I drilled a couple of holes through the side bed frame so I could access the slot to turn the shaft with a screwdriver and another so I could reset the breaker switch that seems to trip every so often. I have hole plugs in place to prevent engine fumes, etc during normal coach operation. Another tip on the unit installed in mine is to be certain the wand trigger is held or locked open when you turn on the power to the washer. Finally, the soap dispenser was just a bottle that you connect to the wand hose with a sprayer on the end. That is a pain so we don't use that unit.
Larry Fritz
(408) 515-5957