When should you replace your cartridge?
1.High water pressure: When the running pressure of your pool filtration system starts to climb and doesn't come down after a deep cleaning of your cartridge, that can be a sign that the cartridge needs to be replaced.
2.Cracked end caps: If the end cap on either end of your cartridge has turned brittle and cracked or chipped, that cartridge should be replaced immediately to keep pieces from breaking off and damaging your system.
3.Torn pleats: The pleats do the filtering. If the fabric is torn or has a fuzzy appearance, the effectiveness of your cartridge has been compromised, and it should be replaced.
4.Crushed cartridge: When the inner structure of your cartridge has been compromised, your filter will look a bit like a crushed can. If this happens, it's time to replace your cartridge.