Pure Alkaline Filter

Reverse osmosis is great at removing the things you don't want — but it also strips out the calcium and magnesium that give water its taste and balance. The Pure Alkaline Filter adds those healthy minerals back in after RO, so your drinking water tastes rounder and fuller instead of flat.

It's a simple inline stage that installs alongside your RO system, and it pairs with either of our reverse osmosis setups. If you've been drinking RO water and something about the taste feels thin or empty, this is the upgrade that brings it back to life.