a substantially rectangular rotating frame element supporting a double disc pump super structure, the rotating frame element having a plurality of frame bars engaged to a plurality of support bars and a plurality of rail conduits engaged to said support bars, at least two of said plurality of frame bars having a shaft defining a horizontal axis of rotation, each of said shafts having a plurality of pairs of shaft positioning openings, and each of said shafts being disposed centrally relative to said at least two of said plurality of frame bars;

a stationary frame element having a plurality of base frame bars, a plurality of uprights engaged to and extending vertically from said base frame bars, a plurality of diagonal braces engaged to said plurality of base frame bars and said plurality of uprights, and a flange bearing assembly engaged to an upper portion of each of said plurality of uprights, each of said flange bearing assemblies rotatably receiving one of said shafts, each of said flange bearing assemblies having a plurality of pairs of positioning holes;

a locking pin being constructed and arranged for engagement to one of said pairs of shaft positioning openings aligned with one of said pairs of positioning holes;

a rotation crank engaged to at least one of said shafts;

wherein said rotating frame element has a first position relative to said stationary frame element which is constructed and arranged to support said double disc pump super structure in a vertical direction, and said rotating frame element has a second position relative to said stationary frame element which is constructed and arranged to support said double disc pump super structure in a horizontal direction which is ninety degrees offset relative to said vertical direction, and wherein said rotation crank is constructed and arranged to rotate said rotating frame element between said first position and said second position; and

said double disc pump super structure having an underside, an inlet suction housing, and an intermediate housing and a plurality of guide rods releasably engaged to said underside, wherein said inlet suction housing and said intermediate housing are slidably supported by said plurality of guide rods during assembly or disassembly relative to said double disc pump super structure when said rotating frame element is in said second position.