Speroni Traditional Vertical Sump Pumps. Vertical motor driven stem pumps for pumping liquid that is not particularly dense such as cellar and waste water with no abrasives. Motor support, pump body, volute and impeller are made from cast iron. Stainless steel shaft, with brass shaft guide bushes. Maximum liquid temperature 90 degrees C. 15mm maximum solids hanling. During operation the pump must be submerged up to the first hole on the stem to allow the shaft guide bush to be lubricated by the pumped liquid.