Is this even in the realm of rational?
This is an "American Products Predator" 200 sq ft (Pentair Clean & Clear, but black resin instead of sand-colored. Pre-2007 (or whenever) model.
I bought this used, so suspected the cart, despite appearing clean and not readily shedding crud when hit by garden hose, was actually blocked somehow.
I just replaced the cart with a Fabco model. New pressure gauge last year.
This filter has the internal "cage" inside the cartridge - could that be causing the high pressure?
The water was shocked to 25 ppm chlorine due to opaque algae (recent CA storms). It is now milky white and opaque, despite running the pump 24 hours with the new cart.
Cannot get reliable test results due to shock and probably still-dissolving CYA.
When I turned off the pump (it has a tiny suction leak I am NOT messing with - the basket is full and the pump is over-sized anyway) the entire system - from pump through return - shuddered. Scary. I am using the remote kill switch from now on.
Any ideas as to pressure and/or opaque white water? When swept, the swimouts produce clouds of very fine with powder - could it be fine enough to get through a cart?
As always, thanks!