toilet takes to long to fill
water SHOULD be coming out the small holes while the tank is filling. if it continues running out these holes, after the tank is filled (and the water has shut off), then like it or not, the flapper is likely the problem, unless the water level in the tank is set too high. Make sure the water level is set about an inch below the top of the fill tube. The toilet does need to be pretty level, but i can't imagine that being your problem. I'm not sure what "siphoning action of the drain " means, but once the bowl reaches a certain level, it will stay there during the rest of the fill (even though water is still running into it). The water level in the bowl does not affect the water level in the tank --in any way.
If it's taking 10-12 minutes to fill, (and if it's a fluidmaster fill valve), the rubber seal in the mechanism needs replacing (5 minute job-no tools required), or possibly some crud partially stopping up the line. You didn't say if it's running wide open during the fill or not, but i'm assuming it's not, and it's a very slow, small stream.
Last edited by Lightfoot; 09-16-2011 at 06:17 PM.