Abstract: A WC bowl and a mounting base, the WC bowl comprising a frame portion (1) whose lower surface (2) is intended to be mounted on a mounting foundation, such as a floor. The WC bowl comprises one or more mounting bases (5) comprising a support surface (51), the support surface (51) of one or more mounting bases (5) being adjustable at a distance relative to the lower surface (2) of the WC bowl in such a manner that the mounting base supports the WC bowl when said lower surface is located on the mounting foundation.