Under-the-sink water ionizer machines are installed beneath the sink, in order that they don’t have to have any Place on your countertop. They are really harder to put in, even so, and also you may need a plumber to take care of The task. There are 2 filters A part https://allhealthmarket.com/product/home-care-2/oxygen-and-hydrogen-generator/hydrogen-inhalation-machine-150ml-h2-hydrogen-gas-generator-hydrogen-purification-device-spe-pem-water-ionizer-for-home-gift/