The Saniflo macerator pump unit fits unobtrusively behind the WC. when the WC is flushed te unit automatically activates to pump waste horizontally to a remote soil pipe up to 50 metres away. Saniflo will also discharge vertically up to 4 metres maximum, or a lesser combination of vertical and horizontal pipe run. (Please note, you are only buying the macerator that is circled in the picture, not the WC).