If you’re picturing a massive machine with tubes and a degree in plumbing, relax. Modern RO systems are designed for DIY-friendly installation. Most come with a simple faucet that fits into your sink’s existing hole, and the tanks are compact enough to hide in the cabinet.
Pro tip: Measure your under-sink space before you buy. Some units are taller than others, and you don’t want to play Tetris with your trash bags and cleaning supplies. Also, look for a system with a quick-change filter—trust me, your future self will thank you when you don’t have to wrestle with sticky o-rings.
There’s even a growing trend of countertop RO units—no installation needed. They’re perfect for renters or anyone who wants to bring a touch of lab equipment chic to their kitchen island. The water comes out cold and crisp, ready for your afternoon seltzer experiment.
