Combination maintenance units in modular design comprising a filter, pressureregulator and a fog lubricator all together in a extremely space - saving construction Many variations. Connecting threads G 1/4 to G 1. Combined Three-Piece Maintenance Units Combined three-piece maintenance unit consisting of a filter, pressure regulator and lubricator, united in one device in extremely space-saving design. Two sizes with different connection threads. Double bowl for filter condensate and oil supply out of plastic (polycarbonate), optionally with bowl protection or metal bowl. Drain valves for condensate either as manually-operated, semi-automatic, fully-automatic internal or fully-automatic external drain valve. Filter elements out of sintered bronze available with two different pore diameters. Pressure regulator with three different pressure ranges. Adjustment can be locked by pressing the handwheel. Version with lockable handwheel in arrested state is also available. Bracket mounting possible. Gauge can be mounted on back or front. Filling oil under pressure is possible (use a spray oilcan).