Semi-open impeller features self-cleaning ability that makes the unit useful in applications involving up to 1/8″ diameter solids and muddy or dirty liquids, as well as clean, clear fluids. Discharge position can be adjusted in 90° increments with vent and drain plugs for all positions. Type 21 mechanical seal and O-ring casing seal. Pumps are close coupled to Totally Enclosed Fan Cooled (TEFC) motors. Pumps are not self-priming and require flooded suction.