The borewell compressor pump works on the principle of difference in density of two-inter-connected water columns and the heavier one over balancing the lighter one. Water outflow through delivery pipe will be pulsated. the discharge of water will greatly depend on the yield of the bore. Air distributor fitted at the end makes this operation possible. Honed Cylinders to give Extra Long Life,Water outflow through delivery pipe will be pulsated and not continuous.