The performance of deep-well jet pumps can be optimized to specific pumping conditions through the use of control valves to create the right amount of back pressure, and this article – part two of our jet pump series – will explain their function and how to adjust them.
“What
is a jet pump, and how does it differ from a centrifugal pump? A jet pump
actually is two pumps in one – a centrifugal pump and a jet assembly, commonly
called an injector.”
"...
if these tests fail to identify the problem, or if the pump is not performing
up to par, you will have to pull the pump, test and inspect it to make a final
determination as to what the problem is, and whether or not the pump can be
repaired."