When I connect my total length of vacum hose to the skimmer I lose about 2-3 lbs of pressure and the pump runs a little louder. When I connect the head (Hayward NaviGator) I lose even more (6-8 total). I disconnected the sections of hose and connected each piece of hose seperatly to see if it was a certain section that might be leaking and found none, each pice connected indiv experienced no pressure loss or change in pump noise. Any ideas??