Sprinkler pump shell cracks, or impeller, leaf damage, or seal damage, will affect the degree of vacuum, water pumping, water pressure is too small or the phenomenon.

The use of sprinkler pump performance in line with the mechanical part of the standard "sprinkler technical requirements" QC/T29114-93 in the requirements of the pump.

Sprinkler is equipped with a centrifugal pump, the pump every time before water, must be added to a certain amount of water to the pump, plus the need to close the water inlet.