Ok here is my question I am having a migrane headache with this problem, When I turn on my filter I am getting a lot of air coming through the lines. I am new to pools but I know enough that this is not normal. I have tried to backwash it several time and restart but it is just not working. I called the "pool man" to look at it he tells me just needed a good backwash. I am still havin g the same problem after this idoit looked at it. Can anybody give me a clue as to what I can do on my own to 1 find the problem and 2 fix the problem? Thanks I really appreciate any help. Oh it is an inground pool hayword filter is new just put it on only used it 1 season.