I have a in-ground pool. Pentair Filter. The pressure is really high. When it gets high enough the water stops moving.
All I have done and all the repair men have done.
Completely drained and cleaned the pool.
Have chemically clean the filters and replaced all the filters.
Have replaced the filter motor ( was replaced years ago with a 2hp motor - recommened 1.1 hp motor bought new)
Have replace the filter housing. ( Was cracked)
Have added DE (I think too much - everyone says just add more)
Back wash all the time (no help)
When I turn on the filter the pressure starts rising and keeps getting higher until the water stops circulating.
When I put the pool just in circulating mode the water comes out of all jets without any problems.
Backwash - add DE - Backwash - add DE doesnt work. Pressure still rises. Within minutes or less.
Have been fighting this thing for 2 years. Almost impossible to keep pool clean when filter not working.
Every part of the filter has been replaced but the multiport valve.
Any ideas no one has been able to help - all repir men have been stump.
Last Idea - bring in a whole new filter system (cost $5000 plus)