How can I tell when my cartridge filter element needs to be replaced? Assuming the filter is properly maintained and correctly sized to the pump, determining when the cartridge is exhausted depends primarily on three factors: 1) Shorter cycle times between cleanings; 2) Low water flow rate and high differential pressure; and 3) Catastrophic failure such as a tear in the media or center core collapse.
To maximize the life of a Cartridge or D.E. grid we suggest the following. Cleaning the elements per cleaning cycle, never use a stiff brush to scrub the media, maintain pool or spa water chemistry in proper balance, do not allow the differential pressure to go over 8 psi between cleanings, alternate two sets of cartridges when cleaning and use an enzyme treatment to break down oils.
