a cistern is a cistern, if you fit it with a flush pipe it is low level, if you fit it with a close coupled kit it is close coupled, all connections and parts are exactly the same, there are some cisterns available which have holes in the bottom for bolts to go through, but i have fitted one of them as a replacement for a low level cistern (the punter bought it out of B&Q, so i fitted the bolt/washer assembly upside down so you couldnt see the bolts (had to cut one of them shorter so it didnt hit the syphon)