Review on Enhance Performance with American Standard 3280.040-0070A 4-Inch Flush Valve Assembly for Champion One Piece Toilets by Danny Kamerer

Great replacement part, good price, simple construction as opposed to the original complicated mechanism, very easy installation with 4 stainless steel screws, you will also probably need to buy a piece of small plastic tube for filling connections. valve to flush valve. I had to install a new flush valve by rotating it 180 degrees from where shown as instructed. This isn't a problem, except that it requires a longer piece of small tubing to connect. This does not affect the function, a very simple flushing device. A long-shafted Phillips screwdriver will make the job easier, but a short one will do just fine.