Greetings everyone, I have a 2002 American Coach American Dream and I have this problem. Whenever I take a shower, a lot of water is coming out of the top of the gray tank and running down to the bottom of the coach. It only leaks with the shower drain. I have been unsuccessful with American Coach and with Fleetwood. I need to know how to access the top of the gray tank where the shower drain is connected so I can fix this problem. Can anybody help me? Anything would be greatly appreciated.