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Tony, the biggest problem with most of the tank valves is that they get "gunk" in the closure and will not operate then. I try to put some type of lubricant into the tank, like Calgon Liquid Water Softener, and it helps to keep the inside of the tank a little more slick and helps to lube the valve also. I also spray silicone lube on the pull cables/rods to keep them working easier. You stated you are leaving your gray tank valves open-- does this mean you don't close them a day or two prior to dumping the black tank? If this is so, if you close your gray tank valves a day or two prior to dumping it can be used to flush the sewer line and make things a lot easier. If you owned an RV prior to this unit you basically know what you need.. since you have the 3 year warranty, use it and let the dealers work on it at Keystone's cost not money out of your pocket. Small stuff like screws and nuts are always good to carry because they will always come loose and fall out because of our "smooth" roads. Good luck and enjoy that new unit!
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