Just bought and just had installed a Santa Rosa toilet that will not shut off when filling. Found flush valve filling chamber to have a triangular hole close to base of cylinder. when you cover this triangle **** with your finger the water then stops during fill. is this hole a defect?

It is really the valve that opens up to let water flow through the bowl when activated by the flush lever, to flush the toilet. it should prohibit water from flowing after the toilet flushes.

Sounds like an air lock is making the water fill in squeeze thru the piping. C if u can undo the piping from the tap below the tank and take out tank and try flushing the unit thru from the out side fill pipe. U may hv something stuck in the pipe line. cheers

There is a rubber seal at the bottom of the flush valve that covers the openning at the bottom of the tank. If this rubber seal has perished slightly then it will leak water into the toilet bowl. This rubber seal need to be replaced to form a proper seal to prevent water leak.

The top of the pipe above the flush valve is threaded if you unscrew this you will be able to remove the flush valve and replace the gasket. I am assuming we are talking about the same here is a link that has all the parts:

http://www.plumbingsupply.com/kohlertoiletparts-santarosa.html

If your referring to the tank, take the lid off and make sure the small tube is connected from the filler valve to the top of the overflow tube. If that's connected properly, flush the toilet with the tank top off and locate the source of the spray. A small crack in the fill valve can cause a significant spray.

The top of the pipe above the flush valve is threaded. Unscrew it, and you will be able to remove the flush valve and replace the gasket.

look under the tank, their should be a nut holding on the old one. by removing that nut the part should free itself.

it is probably falty get a new one

"Fluidmaster" makes a device that clips onto the tank and dispenses a solution into the bowl at each fill after a flush.
It goes inline with the tube runing from the fill valve, and dumps into the flush valve which goes into the bowl when filling.

Most LOWES carries them.
These are better than the ones that release the chemical into the tank because the chemical never has a chance of causing corrosion and failure of the tank to bowl seals.