It was easy to remove the old tank. There was no problem with the tank. It was the mounting gasket. It was very hard to replace the new tank and gasket. Also the arm that came with the tank had to be replaced also. Had to use a pair of pliers to pull the tank into its position. The first time I installed the tank it wasn't all the way seated and fell out. I had installed some Jet dry and when it came uncoupled I lost the Expensive Jet Dry.