Why would the pump pressure be low?
Theyre is normally only a couple of reasons why you would get low pump pressure. The main one is that your skimmer box filter is blocked or your filter before the pump. What I would suggest is clean out both these fliters and give your sand filter a good backflush and rinse. If the pumps performance doesnt increase your other problem maybe that your pool water level is low. If non of these things work or are the problem. The only other 2 options you really have is that you have a blockage in plumbing or your pump is an old pump and needs replacing.