Abstract: A modular connector (20) for separably joining two modular pressure fluid components (21, 22) such as filters, regulators, lubricators, dryers, drains, manifolds, unions, and the like. The connector (20) utilizes a modular arrangement of a joining block (24) and mounting slides (25) on each pressure fluid component (21, 22), with tracks or guide rails (44) on the block (24) engagable in grooves (48) on the mounting slides (25) to provide a slide fit between the connector (20) and the components (21, 22) with mating wedge or cam elements providing a tight sealing engagement therebetween. The components can be positioned from either side, left or right-handed, of the connector. Adjoining sealing surfaces (26, 28) on the components and connector are clamped tightly together in sealed relation by the wedge or cam members, and O-ring seals (29) are utilized to provide a fluid tight seal between the sealing surfaces.