Hi All, I'm new to plumbing, and I decided to install my own back to wall toilet! Got a standard btw pan, a standard shires plastic cister (not btw, as I have enough space behind), hooked it up. Everything works fine, except the flush is a little weak! The flusher is one of the flapper things (I think thats what you call it), and I bottom of the cistern is about 4 inchs above the centre of the inlet hole on the pan. Is there anything I can do to increase the flush. Do I have to raise the cistern, is a syphon better. Any advise would be great.....