holleydukes

Trying to get our pool open and i vacuum the junk off the bottom of the pool. I backwashed it after awhile to clear it out. Well now i have no pressure at all on the sand filter valve. It has been typically running around ten. Anyways i have tried backwashing a few more times and i am now adding more water to the pool. When i have the pump on it is still returning water as normal but just no pressure on the valve. i cleaned out the filter on the pump and got out all debris. Just totally confused y there is no pressure.