The 120 GPH Submersible Pump is internally lubricated and has a durable plastic motor housing. It's impedance protected and has a screened inlet and a 1/4-inch MNPT outlet. It can handle 120 gallons of water per hour; you should choose a pump with a gph of at least half the gallonage of your pond or water garden. Little Giant Pump Company manufactures many models of pumps for a variety of applications. Whether you are a commercial and industrial user or a do-it-yourselfer and homeowner, you can depend on the quality products Little Giant has been producing since 1941. If, after 30 days, you are having a problem with your Little Giant, Franklin, or Red Lion product, call the Franklin Electric Tech Support Team at 888-956-0000 for Troubleshooting and Warranty Instructions. The Tech Support Team is available M-F from 7:00am-4:30pm CST.