We have a plaster vacuum and a long hose that is brand new. We've attached the long handle to the vacuum and plugged in the hose into the holes that go down to our filters and return to the pump. we have a system where we have 2 filters at the end of the pool and the return water goes down into the two holes and through the filters and return back to the pump. There is no suction on the end of the vacuum and we even turned on the booster pump to see if that would make any difference, which it did not. How does this thing work? I couldn't find operations in the pool school. Thanks so much for any help!