The Pacific Coast Imports Gen-X PCX-70 Aquarium Pump can be used as an external circulation or pressure pump for all types of aquariums.Flow rate: 1,537 gph Max head: 31.8 feet Connections: 1" MPT Inlet/ 1" MPT Outlet For external use only Watts: 300Non-leak seal-less pump. Non-corrosive polypropylene housing. No oiling required