Our sump pump will run fine for a few minutes then you can hear it running but no water is moving. Shortly after that the alarm comes on and the backup pump engages. If I unplug the pump and plug it back in then it engages again and pumps water fine for a few minutes.
From my limited research it seems like an air lock. There is a vent hole already drilled in the discharge pipe and it is not clogged. What else could be causing my issue.
From my limited research it seems like an air lock. There is a vent hole already drilled in the discharge pipe and it is not clogged. What else could be causing my issue.