Blue Angel Pumps F50SS 1/2 HP Job-Ready, Pre-Assembled Back-Up and Primary System Cast Iron Pump Housing/Base with TopSuction Intake to Filter Debris and Minimize Clogging Corrosion-Resistant Thermoplastic EngineeredFlow Diverter, for Switch Protection Stainless Steel Upper and LowerFloatGuard and Float Guide Corrosion-Resistant ThermoplasticImpeller forMaximumWater Flow, and Long Life in ToughSump Applications. 1-1/2 in. NPT Discharge for Easy Installation and Compliance with Building Codes