Is the water coming into the pump filling the pump completely? Your description of the water splashing around sounds like low flow.
I would close the skimmer line and open drain line. See how the flow is and what the pressure is at the filter.
Then reverse that and open skimmer line and close drain line. Is there any flow? Does the filter pressure drop?
eet wrote:the pump runs fine and its sucking water becuse i can see it splashing in the pump. but when i change the two valves leading into the pump (drain and skimmer) it stays at the same amount of water comming in. but nothing is happening to the skimmer...it doesnt pull anything in. what could be wrong? thanks for the help