Abstract: The invention pertains to water and grease separators as used in a conventional plumbing system. A synthetic plastic receptacle is supported upon a framework usually located below, or adjacent to, a sink receiving liquid wastes to be separated. The framework supports a pair of coupling halves connected to the plumbing system, and inlet and outlet fittings mounted upon the receptacle align with and are connected to the frame supported couplings when the receptacle is mounted upon the frame. Baffling within the receptacle aids in the separation of water and grease, the fittings permit the receptacle to be quickly removed from the plumbing circuit, and a valved drain within the receptacle permits rapid disposal of its contents.