SW33A1 Hydromatic Submersible Sump pump, 48 GPM, to 26 head feet, .3 h.p. 115 Volt, 10 amp, wide angle float switch, 1 1/2 in. Npt discharge, 3/8 in. solids, ball bearing design, 10 foot cord. Specifications: Pump Type: Sump and Effluent Pump, Minimum Recommended Sump Diameter: SW33 = 18 in. (457mm) Materials of Construction: Class 30 cast iron and engineered thermoplastic Impeller: Thermoplastic vortex Discharge Size: 1-1/2 in. NPT (38.1mm) Solids Handling: 3/8 in. (12.8mm)