Pump Systems Ltd's local representative in Melbourne - Metaval Consolidated Pty Ltd, completed a project at the Mt Martha STP for the supply of four new Vaughan vertical dry pedestal chopper pumps for digester sludge. The equipment was sized to replace existing macerators and PD pumps that were prone to clogging. As rag and fibrous material was a known issue at the plant, the pumps were fitted with 18.5kW, 4-pole speed motors to provide plenty of chopper power and torque in case of heavy solids loadings.