Should I be able to unhook the cleaner from the side of the pool with the filter running? I have a booster pump and I turn that off but I'm not able to unhook the hose from the side of the pool if the filter is still running. I notice that when I do unhook the hose and turn the filter back on, there is quite a bit of water being pushed out from where the hose gets connected. Is that how it should work? I've got a pentair racer.