WATERCO COMMERCIAL HYDROSTAR MK III PUMPS - High Head 60Hz 380 - 415v, s/s shaft 80mm (3") port, Barrel Union connection.Hydrostar MKIII The pump body is manufactured utilising state of the art engineering plastic moulding with a single piece strainer pot and volute for extra strength. The Hydrostar MKIII has been designed to provide a substantially quieter operation with even higher flow rates and higher head than the previous Hydrostar models. Waterco has improved the hydraulic efficiency of the pump with the introduction of an internal volute. The volutes hydraulic