Think of these as the bouncers for your fancy membrane. They catch the big stuff: dirt, rust, and that weird chlorine taste that makes your water smell like a swimming pool. If you slack off, they get clogged fast, and your whole system starts gasping for air. Change them every 6 to 12 months—but if you notice your water pressure dropping like my motivation on a Monday morning, do it sooner. Seriously, don’t be that person who waits until the sediment looks like a science experiment.
Pro tip: If your water source is city water, lean toward the 6-month mark. Well water? You might need to swap them even faster—like every 3 months if your tap looks like weak tea. (I’m looking at you, rural folks.)