I could only find a very old thread when I was looking for a way to automatically vent the air from my filter. So based on some information there I made one. The most expensive part was the brass vent itself (less than $11.00), the rest is a 1/2 inch threaded pvc T, two threaded st. ells, two 1/2x1/4 inch bushings, one 1/2x1/8 inch galvanized bushing (they did not have a pvc bushing in that size) and a 1/4 inch brass nipple. The only problem was that the brass air vent leaked slightly from the top rim and I am being sent a replacement. After I restarted the pump and bled the majority of air out with the Pentair valve I loosened the cap on the brass air vent and the rest of the air was exhausted. I have been checking it for the last few days and there is no air in the filter. I had been getting air in the filter for quite awhile but had not been able to find any suction side air leaks and I was getting worried that the filter would eventually blow up if I did not let the air out every day or two.
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