Problem 4: Pump Will Not Prime A pump that repeatedly loses its prime during irrigation cycles may have a leaking mechanical seal, a leak in the suction line, debris clogging the suction screen, or a leaking foot valve.Feb 19, 2016
Why is my sprinkler pump not priming?
Leaks on the pump's intake line as well as around the shaft seal of the pump housing itself can cause your pump to lose its prime. ... Obstruction-One possible reason your pump may be losing its prime is an obstruction or blockage in a line. Debris blocking the suction strainer or foot valve is the most common cause.