The seat is great, the T-valve you provide is awful. I’ve bought this seat twice now and both times I’ve had a Kohler toilet. The T-valve needs to be more like a traditional toilet valve. This one is metal, slippery and hard to make a proper seal with. Also, even by hand I was able to shred some of the threads on my toilet valve. I had to buy a separate T-valve to make sure the seal was properly made.