This is the gold standard for home water nerds. It uses a semi-permeable membrane and pressure to shove water through, leaving dissolved solids behind like a bouncer at an exclusive club.
You’ll get water that’s almost as pure as distilled. Downside? It wastes a bit of water (about 3-4 gallons for every gallon of clean stuff). Ouch, but your taste buds will forgive you.
If you’re serious about removing everything—salts, fluoride, heavy metals—this is the boss fight you want. Just be ready to install it under your sink and replace filters every six months. It’s a commitment.
Dissolved Solids In Water