Oil water coalescing separator

An apparatus for separating oil from an oil water mixture, said apparatus comprising an oil water coalescing separator having a coalescing chamber having a sidewall, said coalescing chamber containing oil coalescing media, said separator containing during operation an aqueous fluid and a band of collected tramp oil having a thickness and floating on top of said aqueous fluid, said band having a bottom surface, at least a portion of said sidewall being sufficiently transparent or translucent so that the location of said bottom surface can be visually discerned through said portion by an unaided eye of an ordinary observer standing 8 feet away in ordinary lighting conditions, said separator being joined to two or more magnets effective to hold said separator during normal operation off a floor on a vertical steel surface, said separator having a back panel, said two or more magnets being mounted outside said aqueous fluid and spaced apart on a magnet base, said magnet base being located adjacent to but distinct from said back panel.