106INSTALLATION SYSYTEMS / SLENDRA PLUS I nstal lation Systems The Installation Systems permit the installation of high-level WC pan on a normal or low/support wall with a thickness of at least 150 mm, quickly and simply.They do not require any support for installation and feature a cistern equipped with a dual 6/3Lt. flush mechanism. Meridian WC/Slendra Plus concealed cistern Elegant design The elegant design of the wall plates provides the bathroom with a touch of class with the lines of its design. Available in two versions, Chrome and White.