Our pool system is pretty basic (and old). Inflow through skimmer, drawn by the impeller in the pump, into a 3-cartridge tank and out to the pool.
Normal pressure at the filter tank is 20 - 25 psi...and I clean the filters when it approaches 30.
I cleaned the filters (hosed stuff out of the folds using spray attachment on hose) the other day and now I can't get the pressure up above 10-15.
There doesn't appear to be a leak in any of the lines as the water level is remaining constant. All the seals for the filter tank and the little basket filter prior to the impeller all appear to be intact.
The only thing I can think of that I haven't checked is whether there's a hole in one of my paper filters that's allowing the water to just flow through.
I also suspect the pump, only because over the past year, the bearings have started to make more noise...but I'm not sure if that would result in lower pressure...it's the same pump as when we move in 8 years ago...so I'm not sure what the lifespan is of a 1 1/2 hp electric pump.
What say you Foosters?