Black tank Problem
I had a leak coming from the toilet so I removed it to find a large problem. The fitting that seals the tank to the toilet has rotted away. Is this able to be replaced or am I in need of a new tank? I think the tank and toilet are the original units and would like to keep them if possible. The tank holds water and the toilet works fine so all I need to do is get them together somehow. The hole is quite a bit smaller than the norm so I don't think the household 3in flange will work. Also I don't know if it would use a o-ring, wax ring , or gasket. Any help would be appreciated.