Switch to a new filter without shutting down! A single valve on all of the double-manifold MAX models isolates one filter/separator for service while the other keeps operating. You keep running while draining contaminants from the other bowl or changing the filter element.Turbine series filter assemblies are designed to be installed on the vacuum side of the fuel transfer pump for best efficiency and protect precision engine components from dirt, rust, algae, asphaltines, varnishes, and especially water. They remove contaminates from fuel using the following three stage process: Stage One: Separation as fuel enters the filter assembly, it moves through the centrifuge and spins off large solids and water droplets which fall to the bottom of the collection bowl. Stage Two: Coalescing small water droplets bead-up on the surface of the conical baffle and cartridge element. When heavy enough, they too fall to the bottom of the bowl. Stage Three: Filtration proprietary Aquabloc® II cartridge elements repel water and remove contaminants from fuel down to two micron (nominal). They are waterproof and effective longer then water absorbing elements.Turbine series filters are available in sizes to fit any application and are easy to service. MA models are UL Listed and Coast Guard approved for use on boats for hire and use a metal bowl.