I work as a pool tech and one of my customers recently purchased a set of filters for their cartridge filter. The label on the filter itself has been worn off from sun damage, so I can't tell the exact model of the filter but I ordered what my customer had last so it should fit. These are the filters I bought
Sta-Rite S8M150-SET System 3 S8M150 Modular Media 450 - Small and Large Cartridge Replacement Kit
I received them and installed them and the pool was pretty dirty so from what I've seen the PSI should have raised on the filter by quite a lot over night from filtering. The PSI didn't change at all, and I'm trying to figure out what could have happened. Could anyone help? Thanks for reading!