Abstract: This invention provides a multi-outlet adapter for conversion of at least one source of pressure or vacuum to a multiplicity of outlets of the source(s). The adapter comprises at least two abutting blocks. The pressure and/or vacuum sources are connected to aperture(s) in a surface of the first of the blocks. These aperture(s) terminate in first depression(s) in the opposite face of the first block. The depression(s) in the first block communicate directly with a multiplicity of apertures in the abutting face of the second block which apertures in turn terminate on the opposing face of the second block in a multiplicity of second depressions which constitute the pressure or vacuum outlets.The adapter has particular application in self-adhesive label applicators in which a third block preferably abuts the second block and comprises a grid formed from a multiplicity of apertures which each communicate with the second depression(s). The grid of apertures thus resolves the outlets into greater detail.