I'm winterizing my pool. I have a pretty good idea how to do it (at least I thought I did). I'm following the same instructions I did last year, and last year went off without a hitch.
After doing all the necessary cleaning and chemical balancing, I drain the pump basket. I set the mutiport to recirculate, close the valve to the main drain, and leave skimmer valve open to direct air flow to return line and skimmer. I attach the compressor to the front of the pump basket with a 1/4" nipple and turn the air on.
I'm expecting to see air start coming through the skimmer line but I don't see any. So I think, "Maybe the psi wasn't right." So I let it raise up a little more and reattach the hose to the nipple. This time I get a nice flow of air bubbles for about 10 seconds but then nothing. The air just stops flowing through. I let the air run (at about 20psi) for a few minutes, but nothing comes out. So then I think, "Okay, maybe the air is too divided between the skimmer line and the return line." So I plug the return line temporarily to see I can get the air to go through the skimmer. Still nothing.
The only thing I did differently this year is I didn't lower the water level (having read some stuff on this forum about not needing to do that). Would the high water level be a cause of air not being able to move through the lines? Is there something else I'm missing here?