For the last few weeks, I keep thinking that the strainer basket in the pump is full while looking at it (new pump). When I turn off the pump and open it up, however, there's very little in the basket. I finally watched it closely enough to realize that the pile of stuff is getting sucked back into the suction line when the pump goes off. It doesn't seem to matter whether I open the filter relief or not. The debris never makes it back to the skimmer; I suspect it just sits in the pipe. This is an IntelliFlo VS, newly installed by me, though I suspect it isn't really pump specific. I'll post some pictures of my plumbing later.
I'm concerned that I'll never be able to clean out the mass of stuff, and it will just decay in the pump or in the line. Does anyone else have this problem and what have you done about it? All I can think of is installing a check valve between the pump and filter (or maybe before the filter, but I don't have much room to do that), but I didn't think they were commonly put there?