why does the water in the toilet tank run all the time, after it is flashed, i pick up the bulb and it will stop but as soon as i put it down the water comes in and runs.
jnicole, You either need to repair the ballcock (with bulb) or replace it. Depending on the brand of the toilet you may be able to replace it with a fluidmaster ballcock available everywhere but some toilets require that you use the original ballcock. I have most of the common toilet parts breakdowns on our web site that may be of help.
Why not have a real plumber look at it instead of guessing. The running water could be a defective douglas valve OR a corroded over fow tube or a refill tube set to low Or a bad disc (american standard) flapper Or a bad tank bulb or flapper.