American Standard one piece, flush valve gallops!

[gpdewitt]

I'm trying to repair flush valve on an old american standard one piece low profile model. The valve has one of those balance devices made up of two plastic tubes at right angles, one sealed and full of air, and the other open on one end and drilled on the other. What happens is, the toilet flushes ok, then the valve finally closes most or all the way about 5 seconds later, then it kind of floats up off the seat and bobs along as the tank starts to fill, sometimes never closing again. If I apply light finger pressure after the flush, the valve seals and the tank fills, only to leak over several minutes and then the tank fills again. I find no nicks or dings on the valve seat, and the "flapper" is new. Can this be repaired? Should I drill out the hole so the valve closes earlier? Attach weight to the valve so it gets held down after flushing?

Irony here: The condo where this toilet is, and another just like it, was once owned by the president of American Standard. He had the toilets installed when he owned the place.

[hj]

American Standard made several different versions of the tilting flush mechanism. You have the wrong one for that toilet. The proper one has a hollow on one side of the "float" and the other side is closed. By having only half of the floatation, it stays shut when the water is filling. What you describe will also happen if the toilet is plugged and fills with water. Lift the seat when you flush the toilet to see if it is actually flushing properly.

[gpdewitt]

Thanks, HJ. I'll look for other versions of the valve.