Kohler Genuine 1039861 Flush Valve Kit

First, I was worried when I popped my toilet lid off, drained the tank, removed the old, faulty valve, and saw a larger-than-expected, *triangular* hole (that meant my "guaranteed universal" kit wouldn't work). Next, I was worried when I ordered this item. Was it really the right part? And if so, what about all those reviews mentioning installation difficulties? But in the end? It couldn't have been an easier job. This was presumably due to me listening to all the previous reviewers who offered their best tips and tricks, e.g., (1) soak the gasket for 20-30 minutes, (2) lube it up (I used soap), (3) remove the flapper for now (reattach it when you're done), (4) make sure to (a) line the three points up with the triangular hole corners (some make pencil marks on the tank and corresponding marks on this item to line it up, I just eyeballed it) while (b) simultaneously ensuring that the orientation of the valve is a short clockwise turn away from being where you want it in the end, (5) temporarily lift up the gasket to kind of get it out of the way for now, (6) angle it downwards so that the first one or two corners slide under the bottom, (7) apply steady pressure while making sure not to break the corners, and when you feel it finally slide in, finagle the gasket back in place and, finally, (8) rotate the whole thing clockwise to lock it in place. Thanks for the tips, folks! Don't want to give anyone false hope - maybe I got lucky (Lord knows I was due)! - but it really was pretty easy.

Factory quality which is great. Little hard to install, put some silicone lube on gasket to get it to slide into place.

Original part that fit perfectly.

Fits my one piece toilet. You wont find it at Home Depot or Lowes but only at some plumbing supply houses at a higher price. When ordering look for the imprinted Kohler model number in the toilet tank. Only wish it had some adjustability for the overflow tube.

Works as expected. Be sure to manually compress moistened gasket to make installation easier.

Get the genuine item, the aftermarket one’s don’t work well. This goes in easy (easier) and hold tight replacing the OG perfectly. It’s worth the premium price to get it done and forget about it.

WARNING: THERE ARE DIFFERENT SIZED KOHLER FLUSH VALVE KITS. I swear I used the part on my tank to look up the part and then order the correct part number but this one is too big. If the one in your tank now is rectangle and not funnel shaped, double check which you need. The hole is 1/2" wider on this than my original one.

Like many who have reviewed this replacement flush valve kit, I realized I needed to replace this part in a 20+ year-old toilet - and then struggled to find this odd-ball geometry replacement. Kudos to Amazon for clear photos of the product that helped me identify it as the part. (There are two similar-looking replacements and Kohler customer service confirmed this was the correct one for my application - that was very helpful). The installation is a bit tricky and as others have noted - be careful not to force it as the three locking tabs can be broken. I took the advice of others to lubricate the seal and locking tabs with a silicon spray. Once I had the assembly in place, it turns clockwise just a small amount (1/4 to 1/2 inch) to lock into place. No installation instructions are included but there is lots of information in the reviews that will help you install this properly.

Works great, but extremely hard to install.

Fácil de instalar

Desgraciadamente no pude eliminar la fuga de agua. Posiblemente esta defectuosa la refacción. Tal vez me tocó mala suerte. Estoy esperando un plomero para ver si se puede solucionar algo o cambiar el wc.

The product was a Kohler OEM flush valve replacement for a one piece toilet. The installation was more complex than it appeared because mounting inside the tank requires compressing a rubber gasket while twisting the assembly to engage the 3 anchor dogs.

A replacement part for our Kohler toilet. Received it overnight and had it installed. A perfect fit and works well.