Vic, I was really getting frustrated trying to get head to prime after winter storage. Tried several things and nothing was working, and then I read your post about springtime recommisioning. Took off hose, poked pencil in inlet, felt ball move, and wa-lah, water in the bowl! I was guilty of not following the old adage "when all else fails, read the directions". Thanks for your knowledge. Now a question. I still have water standing in bowl after flushing. I have replaced joker valve, and completly disconnected the holding tank vent line. what next? I have a Raritan Crown head. electric, my Carver manual says S/N 885