Beware the shipping fees. Some filter companies charge $10 just to send you a cartridge. That’s like paying extra for a pizza delivery when you’re already hungry.
Also, install tools can cost you. A wrench set for under-sink work? $15 to $30. And if you lose a part? Add $10 for a new adapter.
Oh, and not all filters fit all faucets. You might end up returning a filter and paying restocking fees. Oops. Measure twice, buy once.
