FUEL PUMP SYSTEMS

A fuel pump system, comprising an inlet line (101) and a motorized pump (103), a first selector valve (107) in fluid communication with an inlet line (101) at a first inlet port and in fluid communication with the motorized pump outlet via a first outlet branch at a second inlet port to receive fuel from the motorized pump outlet. The system also includes a main fuel pump in fluid communication with the first selector valve (107) and a second selector valve (115), wherein the second selector valve (115) is in fluid communication with the main fuel pump and in fluid communication with the motorized pump outlet.