I have a problem with some raw water (it usually has sediment and gunk) that I need to pump from below ground level. I came up with something that looks like the image attached to get cleaner water out, but the pump is only sucking the water out of the filter (I filled the pipes with waters first), and not pumping any of the water that is underground. I know that the pipes would have looked cleaner if I had rotated the pump, but I had to workaround some constraints.
I am using a DAB KDF 30/16 pump (1/2hp), the filter is 10", the piping is 1", and there are a total of 7 90' elbows and 1 tee at the intake (there are some extra turns that I couldn't draw in 2D). I'm also using a strainer with a check valve submerged underwater.
I'm pretty sure my pump is working ok, but there most be something impeding it from pulling water. Any ideas what could be causing this?