When to Replace your Sta-Rite SYSTEM:3® Modular Media Filters - SM Series (Filter Cartridges)
The Sta-Rite SYSTEM:3® Modular Media Filters - SM Series has the industries longest lasting cartridges of any Cartridge Filter. I usually get 8-10 years of use out of them before I replace them for my customers. As long as you clean them at least every six months they should be very long lasting. It is a good thing too that they last so long because the replacement cartridges are very expensive. I buy only the Sta-Rite OEM cartridges when I replace them. So when to replace them? Usually when the pool starts to have issues like the chemicals zeroing out, cloudy pool water and poor flow after cleaning them. They can become very stained also and on rare occasions the pleats can form tears. But since they are so well made it can be tough to know when to replace them and if your pool is circulating fine without issues and the cartridges are old, keep using them until problems with the water quality develop. You can see from the video that the 450 sq ft ones when compared to a 4