Kohler K1078578 Flush Valve Assembly Kit

works great but a little tricky to install have to line up holes and put lots of pressure on item to squash gasket then turn it a 1/4 turn, took a few tries hope I never have to replace it again

The part is the same that came in the original toilet. It is a bit tricky to install though because the gasket is quite thick and makes it almost impossible to push the valve inside the toilet and turn it. I found in YouTube however a clever trick that made the installation supereasy: compress the gasket and freeze it. I put it between two wooden boards, applied a pressing tool to it, so it would stay thinner and froze it for 4 hours in the freezer. After that I put it back in the flush valve before it defrosted, and install it. No hard pushing, nothing; the gasket remained so thin it was easy to push the valve and turn it. Once the water started filling up the tank, the gasket defrosted and expanded, sealing the tank perfectly.

muy bueno

Quick install (no problems):- Turn off the water supply to the toilet.- Drain the water from the tank by flushing the toilet and soaking up any remaining water with a sponge or towel.- Make sure you have good lighting and visibility inside the tank for easy access.- Remove the old flush valve by twisting it to the right and pulling it out of place.- Install the new flush valve by aligning the three teeth on the valve with the notches inside the tank.- Use both hands to press down firmly, then twist the valve to the left to secure it in place.- Turn the water supply back on and check for leaks.The entire process should take around 20 minutes.

It fits perfectly . Good quality. Original from Kohler !