Review on 🚽 Enhanced Kohler K1078578 Flush Valve Assembly Kit: Optimize Your Search by Juzer Rashid

This flush valve kit does the job. You need to know what you are doing and how much pressure you are using to compress the rubber gasket before screwing it into place. That's the best advice I can give. I'm no power superman, but I use brains, not brawn, when doing chores, and that's usually the way to go. Read the instructions, don't improvise, take your time, and don't use excessive force. Once you've removed the old valve, feel it in the waterway to determine the notches for the tabs and the wall thickness so you know where to put the valve and how hard to compress the rubber seal before attempting the valve to turn. Do not add grease to the seal.