WAYNE 1/2 HP Cast-Iron Pedestal Pump 1/2 HP; max. flow rate is 5000 Gallons Per Hour; 3800 GPH at 10 ft. of discharge lift Rugged, cast iron pump base and epoxy-coated steel column for long life Top suction pump design eliminates air locks and clogging from debris in bottom of sump pit 1-1/2 in. NPT discharge for standard plumbing installation Will replace most submersible sumps without any plumbing changes