What can i do to fix the toilet that flls too slowly

replace the guts first,with universal ones,5 bucks at walmart,what happens is calcium builds up inside them and slowly closes the fill hole,just like your shower head,its easy to install the new "guts", Fluidmaster Universal Fill Valve 400ARP25 The Home Depot

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Valve fully open on inlet going into toilet if it is then fill valve needs to be replaced check water line for any abstructions that might interfere with water going into tank.

You will need to check the drainage fitting these toilets are draining into. If it is a cross tee fitting without a baffle you are getting throw over across the fitting and it will not stop. The only fix for this is to replace the fitting in your drainage system. In Illinois it is a code violation to put this type of fitting in that application.

When these power flush toilets come out it made this problem worse. In short there is no fix for this problem other than redoing the drainage system.

flush valve has obstruction and tank is not filling all the way to just below overflow tube.

Hi,
The flapper is bad....and allowing water to go through into the bowl very slowly...You need to find the correct flapper for that toilet....even all Mansfield toilets can have different guts inside....then replace the flapper which is very easy to do...

heatman101

More then likely the power valve in your flush master ball valve is out.. Replace flush valve and should fix problem. Home depot sell fluid master for like 7.50

Call kohler they do have replacement cylinders

It needs a new air shock on it. You might be able to take the old one apart and fix it but replacement would be best.

buy a universal fill valve and replace it

needs a new pump and control maybe, its the most common sollution for that problem