One picture of inside of cistern and one of valve in the link below - address will need to cut and pasted -
//www.diynot.com/network/user_album_update.php?album_id=2008
There should also be some text showing against the picture of the inside of the cistern. If not the bottom feed is...
Has anyone know where I can get a replacement 1/2" microvalve for a Conceala WC cistern? I've just taken the existing one apart and found a split in the rubber diaphragm - hence the constant overflowing!