The Pacific Coast Imports Gen-X PCX-150 Aquarium Pump can be used as an external circulation or pressure pump for all types of aquariums. Flow rate: 2,131 gph Max head: 41.25 feet Connections: 1" MPT Inlet/ 1" MPT Outlet For external use only Watts: 400Non-leak seal-less pump. Non-corrosive polypropylene housing. No oiling required