Larry, thanks for the info. I assume you replaced electric with manual valves, as much more reliable. We are in route from Bend, OR to the Florida Keys, presently in Vicksburg, MS., so no urgency as to manufacurer. I have service panel easily loosed and manually close the grey tank valve, but a real hassle, especially at 25 degrees and 30 mph winds. Will probably have Bend replace on our return in a couple of months. Again, thank you. Was beginning to think only I had faced similar problem. Love our coach, assume you feel similarly.
Jim Felton
2005 Patriot Thunder
Bend, Or