If we have a centrifugal pump suctioning fluid that sits at a lower altitude, is the relative inlet pressure negative? - Quora
We know, the suction limit is 10 meters only on suction for centrifugal pump. How do the centrifugal pumps lift water from 70 meter depth for irrigation purposes? - Quora
![Vacuum Pump, Negative Pressure Air Suction Pump Simple to Install Hand Held DC12V for for Instrumentation: Amazon.com: Industrial & Scientific Vacuum Pump, Negative Pressure Air Suction Pump Simple to Install Hand Held DC12V for for Instrumentation: Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/61PVGDTHWXL._AC_UF894,1000_QL80_.jpg)