10-13-2013, 12:52 PM
This is what the air valves look like. The rubber seal may have come out of the valve gate and is blocking the drain hole.
http://www.dupreeproducts.com/SearchResults.asp?Cat=1
http://www.dupreeproducts.com/SearchResults.asp?Cat=1
Steve Bare
1999 Newell 2 slide #531