Your filter will scream for help in dramatic ways. Your shower pressure drops to a sad trickle. Your ice cubes taste like a swimming pool. Or your laundry comes out smelling like a damp basement that time forgot.
If you notice your water pressure go from “power wash” to “elderly sigh,” it’s time. Also, if your tap water starts to taste like regret, change that filter yesterday.
Another clue: your filter housing gets slimy. That greenish gunk isn’t “character”—it’s a biofilm party, and you weren’t invited. Time to break it up.
The "Just Look at It" Rule
Once a month, give your filter a peek. If it looks like a swamp monster’s sock, change it. Manufacturers say “every three to six months,” but they don’t know your water. You do.
For big families or heavy water users, change it every two to three months. For a single person who barely showers? You might stretch to eight months—but don’t push it. Your future self will thank you.
And here’s a surprising fact: some filters can last a whole year if you have pristine well water. But that’s like winning the lottery—rare and not worth counting on.
