Exactly How Often Should You Change a Water Filter?
Knowing exactly how often should you change a water filter is the key to making sure that expensive pitcher or under-sink system is actually doing its job. We've all been there—the little red light on the fridge starts flashing, or that sticker you put on the pitcher six months ago is looking suspiciously curled at the edges. It's easy to ignore, thinking a few more weeks won't hurt, but the truth is that a filter's effectiveness isn't indefinite. If you wait too long, you're basically just pouring water through a block of old carbon that's already full of the very stuff you're trying to avoid. ...