About 2 months ago I started to notice a constant "dripping" noise in the wall next to the toilet which became more pronounced if not an all out draining sound should the bowl become filled past it normal level. ex: if one were to pour a bucket of water in the bowl you would hear it draining before being flushed.

I noticed that the toilet would fill itself in the tank periodically so I turned off the water at the shut off valve to the toilet and noticed that the water in the tank would completely drain out. Now I am assuming it is going down the drain because I am not seeing water anywhere and I would assume if there was that much water leaking out, one would notice it and I have looked all over the house for signs of leaks and water and found none.

It was a very old toilet so I replaced it myself. An Elijer 2 piece toilet, new flexible water line, new wax ring...etc. The replacement went smooth, flange was in perfect shape as was the floor (no water damage)

Now, the water is no longer leaking out of the tank. But, the toilet sounds as though it is "draining" or "dripping" when the bowl fluid level increases beyond the normal tank level.

The toilet sounds as tough it is "draining" or "dripping" when the bowl fluid level increases beyond the normal bowl level.

Ex: If we were to pour a bucket of water into the toilet bowl, I hear water either "flowing" or "dripping" though the pipes even before it is flushed.

Once the water level in the bowl is back to its normal level it stops.

The toilet is not running constantly or leaking out of the tank. Just happens when the water level in the bowl portion of the tank increases.

Again, I only noticed this start to happen a few months ago, find no signs of leaks, new toilet...any ideas?