bathroomplumbingtoilet
On my toilets, both fill tubes are connected to the OUTSIDE of the overflow tubes, so the stream of water is going directly to the tank.
I went ahead and directed the stream to now go into the overflow tube.
Will this help the performance of the toilets now?
I would just install a new fill valve. They are inexpensive and fairly easy to replace.
After disconnecting the old fill valve you can try turning on the water to see if you are getting water from the supply as expected. Use caution, as the water can shoot out all over the bathroom. If you are not getting water from the supply you likely have a different issue.
I think @Tester101 has asked the pertinent question: Is the fill valve height adjustable? It is. You need to adjust its height:
Best Answer
Yes. That's how it's supposed to be.
You have water coming out by the tube which has the on/off mechanism and a small flexible pipe that is expected to send water inside the overflow tube to refill the bowl. Without that, the bowl is not likely to refill much, actually.
I uploaded a video on YouTube to show it in action.