Myers WGX75H-43 Hazardous High Head Submersible Grinder Pump 7.5 HP 460V 3PHMyers Model WG75H WGX75H Submersible Grinder Pump Description The Myers High Head 7. 5 horsepower submersible centrifugal grinder pumps are designed for municipal, commercial and industrial applications. These pumps are especially suited for use in pressure sewer applications or in systems with long discharge runs or high static heads. The pumps feature a heavy duty cutter mechanism and recessed impeller designed to efficiently grind typical sewage.