hi - is it possible for air to be trapped in a pump intake line (at a high point in the run) and remain there, even if the pump is sucking water and appears to be holding prime?
my intake line runs out at a slight downward grade from pump (camp) to a holding tank / cistern - at the tank it turns upward a bit, into the tank , and then down again to the foot valve (I do not have a bulkhead fitting at the bottom of the tank - only at the top). So the tank entry point is a high spot. I pulled the water up to the pump (bladder pump) to prime it 1st time. The entire run appears to be leak free. When the pump stops, I lose about 10lb pressure, then it holds steady - making me think there must be a pocket of air in the line somewhere...?
thanks
my intake line runs out at a slight downward grade from pump (camp) to a holding tank / cistern - at the tank it turns upward a bit, into the tank , and then down again to the foot valve (I do not have a bulkhead fitting at the bottom of the tank - only at the top). So the tank entry point is a high spot. I pulled the water up to the pump (bladder pump) to prime it 1st time. The entire run appears to be leak free. When the pump stops, I lose about 10lb pressure, then it holds steady - making me think there must be a pocket of air in the line somewhere...?
thanks