How does a centrifugal pump work? - An Pump Machinery
How does a centrifugal pump work? - tec-science
useful information on self-priming pumps
Vacuum-Assisted Priming - Pioneer Pump, Inc. - Americas
Enhanced Self-Priming Pump
Centrifugal Pumps: Types, Applications, Benefits, and Maintenance
End Suction Centrifugal Pump/Vacuum/Oil/Pulp/Screw/Diaphragm/Magnetic/Inline/Self-Priming/Sewage/Chemical/Fire/Water/Electric Pump - China Water Pump, Industrial Pump | Made-in-China.com