An apparatus for receiving a pig (12) comprising: a receiver housing (2) arranged to enable connection to a pipeline; a pig retention mechanism (4) mounted within said receiver housing (2), said pig retention mechanism (4) arranged such that it is operable to retain the pig (12) within the housing (2); a first sealing member (6) operable to seal the portion of the receiver housing (2) through which the pig (12) can be removed from the apparatus; a second sealing member (5) operable to seal the portion of the housing (2) that connects said receiver (1) to the pipeline; a fluid inlet (7); and a fluidization and transportation device (8) arranged to receive the fluidized debris, wherein the apparatus is arranged such that, in use, pressurized fluid is introduced into the enclosed interior of the housing (2) via the fluid inlet in order to fluidize debris which is then removed from the receiver housing (2) via the fluidization and transportation device (8).