My toilet just started acting up and after I flush it seems that all the water leaks out of the rim of the bowl and whatever would have been in the line from the foot pedal up to the bowl. This results in when I go to flush the toilet at a later time, the powerflush doesn't shoot water out like it used to. It now takes several seconds of holding the foot pedal down to get the water up from the valve behind the foot pedal. It then begins to slowly flow and trickle down the toilet buy eventually has full power. If I flush again within a few seconds before all the water leaks out it works perfect just like it used to all the time, with the water shooting out of all the holes in the bowl with full force. So it only happens when it sits for a few minuets and has a chance for all the water to leak out past the valve. Has anyone experienced this problem and know what to do to fix this. I called Dometic and they wanted me to put some screws in the valve behind the pedal and they said that would fix my problem, but it hasn't.