The LH-W-series is a three-phase cast iron 2 stage pump high head drainage pump. The pump is cylindrical and slim and can be installed in a well casing for deep well dewatering. The center flange construction allows the pump to be “hung” in the discharge pipe. The top discharge, flow-thru design provides maximum motor cooling efficiency allowing continuous operation at low water levels and extended dry-run capability. The pump incorporates seal pressure relief ports that relieve the pump pressure before it reaches the shaft seal.