Hayward Sand Filter 240- pressure?

[mshumack]

When the pressure shows zero it means you are not getting water into the pump.
Another possiblity (from not filling hose first) is that your vacuum hose is collapsing and restricting the flow to the pump. In my pool, I have to adjust the 3-way valve so I am drawing half the water through the main drain and half through the skimmer (where vacuum hose attaches) when cleaning the pool. If I let all the water (suction) go through the vaccum cleaner the hose will collapse.

[JJParrish]

Thank you JohnT & ms. Actually, we think the culprit was the old hose that came with the pool (and the house in Feb). It had been tossed up under the deck..for how long we do not know. It did work for us for 3 or 4 times, but we bought a new one yesterday. The vacuuming went well. We appreciate your quick responses. This forum is so great.....all of you folks helping us newbies. Thank you. Joyce