Red Lion RL-50C Cast Iron Sump/Effluent Pump with Snap-Action Float Switch, 1/2 hp, 4000 Gph Heavy-duty Cast iron construction for rapid heat dissipation and extended life Built-in rod protection prevents float form contacting basin Solid float-water can't seep into the float Snap-action prevents debris from impeding operation Clog-resistant screen is capable of passing 1/2-inch diameter solids