I hate Kohler products, but since I didn't want to rip the the shower out I had to fix the fixture the house came with. Five showers a day for ten years isn't bad for a fixture. Don't bother calling the Kohler help-line, Bambi will just tell you to replace both the valve and the proportioner. I ordered the valve first and that stopped the drip. After a few minutes of thinking things out I installed it 180 degrees backwards which caused the hot to come on first instead of the cold. This seems to be the o..
The Kohler Coralais shower valves are garbage. They will leak in 5-6 years guaranteed. It does not matter how often you use them either. I have two bathrooms with these units and one was used at least three times as much as the other and they both started leaking within 3 months of each other. This item does not usually solve the leak. You also need to get the GP500520 Kohler Pressure Balancing Unit which is another $40. You can try to get o-ring kits and replace every single part in it and it will st..