Report "I have a 1 yr old new Danze Orrington two piece toilet. DC013230-DC012223. I have 3 of the same actually but only one is giving me problems...the one on the first floor of the house. The flush is weak on it about 85% of the time. Sometimes very weak. But the odd thing is that when I lift the tank lid, leave it off, and flush, then it flushes stronger then ever. But once i put the lid back on, the weak flushing begins again. It is almost as if the toilet needs to have the tank lid open for air to enter the tank?! Anyways, I am stumped and my plumber has no idea what it is either. Please help!! Thanks! Keith"