I was doing some work for my First Aid squad, and ended up replacing the flush valve and the flap. Every night when I leave, the toilet is silent, when i come in the next day, the toilet is filling very slowly/slightly without having been used. I've adjusted the flush valve's screw to change when it should cut off but no setting seems to fix it. The only thing I can think of is there is a leak somewhere but then, why doesn't it happen after adjusting the screw...
American Standard toilet
Cant remember the flush valve kit
American Standard toilet
Cant remember the flush valve kit