the minithe pumpbecausethe pump bodyair orthe inletgas accumulation, ortheend of the valvetoclosethelaxirrigation waterdissatisfactionseriousleakofthevacuum pumppacking,gate ordoorclosed lax.the minithe pumpRemedy: First thewater pressureup, and thenpumpfilled with water, and thenbootthe minithe pumpandcheckthecheck valveare tight,piping, fittingsorwithoutair leaks,andfoundtheleak.