WAYNE CDU790 1/3 HP Submersible Cast Iron and Steel Sump Pump With Integrated Vertical Float Switch N/A Imported Assembled in the US with foreign and domestic parts. Tested to 1 million cycles* Mechanical float switch provides reliable operation and allows installation in sump basins 11" in diameter or larger Top suction strainer filters debris and protects pump from clogging. The pump does not require weep holes and the cast iron seal plate prevents galvanic corrosion and leaks High capacity 1-1/2" npt discharge Heavy duty oil filled motor for long life Cast iron pump housing for durability