Pool and Spa
Questions about Pool Repair? Ask an Expert Online.
It sounds like you have a blocked off line either on the suction or return pressure. High pressure in the filter housing means water is getting into the filter but being partially or completely blocked trying to get out. Look for a closed valve in the system. Now also just for the sake of it look at where the plumbing goes into the filter housing and at each connection (there are two one in and one out) be sure that the filter was installed with the flow of water being correct, meaning that the pipe that comes out of the pump is the filter inlet line and the filter outlet line is the one going back to the pool return lines. What you are describing sounds a lot like a filter that was plumbed in backwards.