Hi folks. Im new here but have always found theses forms a great way to get things like this answered. Basically a small rubber valve has broken inside my ball valve which is more like a box than a ball. Anyway no where I have found stocks this part or has even seen the set up I have. It is a pretty modern toilet with center flush button with the two flush types. The weird thing is that the main water feed comes from the back left of the cistern and joins the ball valve via a metal pipe. None of the normal side entry systems fit and the only identifiying marks on mine are a number (2970 followed by a W with a sort of squiggle at the end. i've had a plumber out who said he cant find the part and I need to replace the whole toilet which is tiled in. If anyone can help id be eternally grateful.