Deep well pump

[kamikadze1121]

Hi I have problem with double drop deep well pump so I got new pump with vessel ,after priming and turning on I got about 30psi when is on, when its off not keeping pressure not filling vessel with water and loosing prime ,so I change foot valve and check suction pipes for leek but all looking good apart of jet ejector and pipes everything is new my question is ,could that be jet ejector that is faulty ?

 

[Valveman]

You could have a faulty or the wrong size ejector. But you might also need to add some backpressure. Two pipe jet pumps don't work unless there is sufficient back pressure to make the ejector work.