unable to maintain prime on the pump

[shirley]

We developed a large crack at the bottom of the skimmer and have just finished replacing the skimmer. There are no apparent leaks now. However, even though the pump is full when I turn it on (opening the lid and allowing it to flow in), it quickly loses prime. The pump continues to draw some water but no pressure is generated in the sand filter and the pump will not fill. I'm sure I missed a step - just don't know what that is. Can you help?

[Guest]

First place I would look is the pump lid. Make sure the oring is in place and air isn't being pulled in there.

If you are able to shut off the flow from the skimmer and only draw from the main drain, you can see if the problem is at the skimmer. If you don't have a main drain or can't isolate it you can't try that of course.

We developed a large crack at the bottom of the skimmer and have just finished replacing the skimmer. There are no apparent leaks now. However, even though the pump is full when I turn it on (opening the lid and allowing it to flow in), it quickly loses prime. The pump continues to draw some water but no pressure is generated in the sand filter and the pump will not fill. I'm sure I missed a step - just don't know what that is. Can you help?