{"id":958,"date":"2026-07-12T09:07:47","date_gmt":"2026-07-12T01:07:47","guid":{"rendered":"https:\/\/borrapumps.com\/blog\/what-is-a-self-priming-pump\/"},"modified":"2026-07-13T15:56:39","modified_gmt":"2026-07-13T07:56:39","slug":"what-is-a-self-priming-pump","status":"publish","type":"post","link":"https:\/\/borrapumps.com\/fr\/blog\/what-is-a-self-priming-pump\/","title":{"rendered":"What Is a Self-Priming Pump? How It Works and Where It Fits"},"content":{"rendered":"
\n

A self-priming pump is a centrifugal pump that can clear air out of its own suction line and start pumping without being manually filled before every use. It does this by keeping a charge of liquid inside a reservoir in the casing, recirculating that liquid to separate and expel trapped air, and then drawing the process fluid up the suction pipe. The one condition buyers forget: the casing has to hold liquid for the first start, so a self-priming pump still needs an initial fill and must not be run dry.<\/p>\n

That single ability – re-priming from a partly empty suction line – is what separates it from an ordinary centrifugal pump, and it is why self-primers are common wherever the pump sits above the liquid or has to restart on its own.<\/p>\n