I replaced the lower and upper pistons and new washers and spacers on the Fleck model 9000. My question is the lower piston back metal plate is now leaking. I have taken apart three times now and have made sure washers and spacers were in correct order, they were and are. The plastic white spacer is installed correctly, still leaking when I turn water on. Any suggestions on what I might have done wrong.
Thank you.
Thank you.