How deep can a pump "suck" water from?

[hantrongtai1]

can somebody explain why a shallow well pump wont suck water at a depth of 29 ft? what kind of pump will and do you have any suggestions
thanks
george

 

[Valveman]

Atmospheric pressure, adjusted for your particular altitude, is the limit on how high you can draw water up. submersible pump is pushing water, and therefore can go about as deep as needed. A two pipe jet pump can also lift from deeper than 30', but the ejector needs to be installed at depth.

 

[hantrongtai1]

Atmospheric pressure, adjusted for your particular altitude, is the limit on how high you can draw water up. submersible pump is pushing water, and therefore can go about as deep as needed. A two pipe jet pump can also lift from deeper than 30', but the ejector needs to be installed at depth.

Thanks so much