I have a Kohler Santa Rosa toilet circa 2013. Water only fills the tank about 20% of the way – to the bottom of the center tube. I lifted up the center tube and noticed a red, possibly rubber, ring dangling off the bottom. I suppose this is the sealing between the tank and the bowl. Since there is no longer a tight seal, the water constantly leaks from tank to bowl.
I tried to remove the whole center tube to attempt to reattach the sealing, but I was prevented from completely removing the tube due to it being stopped by this disk thing. This "disk thing" is usually connected to the white tube, but I disconnected the tube during this repair. What are my options to repair the sealing if I can't get good vision of it and can not comfortably maneuver my hands around it?
Best Answer
I found this video that appears to be for the same unit you have.
You should be able the twist the small disc 1/4 turn counter clockwise to free up the cylinder for removal.
The small disc is part of the whole unit so try grasping lower on the cylinder with one hand on the disc with the other. Yours may be stuck with grime, try gently working it.