pump losing water pressure
I inherited an irrigation system at my home that works, but every few minutes, the sprinkler heads lose pressure and stop, then they start up again after spurting air a bit.
I have a 1 1/2 hp cent. pump with shallow well and I uncovered the suction lines to the well head to check for leaks. Nothing obvious. I can hear the pump when it loses water as the pitch increases, the heads stop spraying.
Could it be a bad check valve? There's a brass one on the 2 inch suction line. Or something else I could try?