I was recently living in a 26 story condominium and had this Duravit 1.28 L flush metro single bowl unit. I had continual problems with his toilet where it would ghost flush randomly it would run and more importantly would just overflow in the middle of the night usually always at two or three in the morning without anyone even using it for hours and hours on end. I believe there was a problem with the toilet and then the manufacture as well as in addition to the flapper. Can anybody expound any information that they have about this model toilet if they know any information about it. Also was it wrong to have this toilet was such a low flush in a 26 story condominium that was old please let me know your thoughts thank you