A cistern is required for every toilet in order to store the toilet water for flushing. Cisterns come in a range of styles and colours to suit the compact, convenient bathroom as well as the modern, fashionable bathroom. When you're installing a wall hung pan or basin, back to wall toilet or a bidet, a concealed installation frame is used to support and lift the unit from the floor. It's great for saving space and creates an illusion of a bigger bathroom.