This helped me, all I needed to replace was the main part of the middle cannister. The seal was almost all gone and the top yellow piece was broken off. Thank you.

Fred, thank you for the video. You made putting in the base look so easy, just a little plumbers grease, twist and snap in place. Well you are a very lucky man. The only plumber I know who has faced this problem said after trying for an hour, he just replaced the toilet. I worked on mine an hour before I called Kohler, their tech said everyone has a hard time and his only suggestion was soak the gasket to make it softer then use dish soap to make it slippery.

Your video is the only one I found showing how to replace the canister base. A lot of people have trouble with this as I discovered in chat groups. Even the instructions that come with the kit says the base replacement is difficult. I replaced the base because all three "tabs" were broken off. I found one of them in the water passage just below the canister. I ended up making a tool so I could push down and turn at the same time. I lubricated the base and gasket with olive oil. I was just about to give up when the base finally snapped into position. Thank you for the video.

Thank you so much for this. Mine just started acting up, and i noticed that the whole damn canister lifts up and off the bottom of the toilet tank. It's missing 2 of the 3 tabs, which I'm not sure how that even happens. So I'll verify toilet model number as per your instructions here, order the parts and get it done. Thanks again for this video. I couldn't find any other video on doing the 1-piece toilet. All others are/were the 2-piece setup. Thanks again!

This a great video and super helpful! Thank you so much for taking the time to put this out there for those of us technically challenged people 🙂

Excellent !

Thanks for your video. Just a tip for anyone replacing this unit and having trouble with the base/gasket. You must take off the upper cylinder portion or you will never be able to get enough leverage to flatten out the gasket where it meets the bottom of the toilet tank. If you turn the whole unit upside down, you'll see a middle tab holding together the upper and lower pieces. Turn the upper middle part 90 degrees so the tab can disconnect from the base/gasket. Using silicone plumber's grease (Amazon for less than $5), make a bead all around the bottom of the gasket and then spread it with your finger so the entire bottom of the gasket is covered. You do not need dish soap as per the instructions. Line up the tabs of the base so they fit inside the tank opening at the bottom (mine is triangle shaped). Now the important part - put your hand palm down across the top of the base unit and press straight down with all your body weight. While pressing down as hard as you can, try turning it to lock the tabs underneath the ceramic tank bottom. I was able to do this rather quickly, which surprised me given all of the horror story posts. Once seated, line up the tab from the top portion that you disconnected earlier, insert, and turn 90 degrees so it locks. connect the chain to the flush lever and you should be good to go. Really must push down with your whole palm or it will not work. I tried grabbing it around the edges and just could not get enough downward pressure to compress the gasket. Good luck and happy flushes!

Your toilet model is actually 3810. I have the same one. Just ordered the parts and thanks again!

Thank you Fred

Thanks for the video. All the tabs were missing on mine. I wonder what causes that.

This video is so helpful. Thank you so much. But I have a tough time locking in the gasket at the bottom. Where do you put the Plumber's grease?

My problem is ghost flushes. Do I have to replace all of this?

Plumbers grease might not be good for the gasket

super helpful. could not find the right part but looks like what i need. need to replace flush valve for one piece gabrielle toilet. the bottom triangle part that locks under the tank snapped off on my old one, so the whole thing tipped over and can't hold water in the tank.