[Sr.No.] 3 [Possible Cause] Water level in well too low [Corrective Action] If partial restriction corrects trouble, leave valve or cock at restricted setting. Otherwise, lower pump in well if depth is sufficient. Do not lower if sand clogging might occur. [Check] 
Amount of water in well (recovery rate) may be too low for pump capacity. Restrict the flow of pump output, then wait for well to recover and start pump.