The Subcommittee will limit its activity in the above matters to Centrifugal Pumps including the following: Overhung impeller, close coupled pumps; Overhung impeller, separately coupled pumps; Between bearing, separately coupled, single stage pumps; Between bearing, separately coupled, multistage pumps; Regenerative turbine pumps; Special effects pumps Excluded from the scope of products are Vertical Diffuser type pumps as described in the scope of The Vertical Pump Section. Technical documents developed are limited to nomenclature and definitions.