when you say long plastic sheet "do you mean the part in the middle of the cistern , were the water goes in to the bowel, its like a flask" its called digafram", and it has a mesh bottom on it , but you cant see this , sometimes it rips , so only half of the flask" is working , thats why the noise is so bad,, you can try B&Q , but there are different types, , if your cistern has a white plastic pipe. comming out of it going to bowel , you can get a standard digafram, but ask at the shop
mark
March 2010