We installed a TOTO Dual-FLush toilet about a year ago. A couple of months ago, we're getting this very strange "surge" of water when it refills the tank. It seems like it has something to do with the "siphon" component in the tank. By "surge", what I mean is that the water doesn't simply flow into the tank non-stop; but rather it seems to get into the tank in like 5-6 surges of water coming in until it tops off and stops.
Anyone have this issue? know of what the problem is?