Size:1/3 HP 1/3 HP cast iron and coated steel submersible sump pump. Assembled in the US with foreign and domestic parts. Float switch tested to 1 million cycles. Top suction pump design eliminates air locks and clogging from debris in bottom of sump pit. Epoxy-coated steel motor housing and rugged, cast iron pump base. Fully submersible. 1/3 HP; max flow rate is 3800 GPH at 0 ft. 1 1/2 in. NPT discharge. For use in 11 in. diameter or larger sump basins; 9 in. ON level and 4 in. OFF level. From the Manufacturer The Wayne CDU790 features durable cast iron housing for long life and quiet operation. This submersible pump is compactly designed for 11" or larger sump pits. The CDU series is one of the most popular replacement pumps in America. The ceramic mechanical seal assures long life in the most demanding applications and the 1 1/2" discharge allows easy installation plus maximum flow. Similar applications to the following brands of submersible sump pumps , Craftsman, Zoeller, Flotec, Water Ace, Myers, Little Giant, Liberty, Pit Viper, Ridgid, Blue Angel, Sta-Rite, Starite, Diamond, Star, Flint and Walling, Coleman, Maytag, Jacuzzi, ShurDri, Shur-dri, GSW, Teel, Master Plumber, UL listed