The lower the number, the more electrons there are, and the better it is. You can obtain this from the Watershed. The unit is designed to rest on the countertop. The faucet is on the input side, because when the water is pushed into the machine it is split into two components, which exit from two different tubes. One is alkaline, which you drink, and the other is acidic, which you use to brush your teeth and wash your skin with.
Most toothpaste is toxic, and leaves a residue.
The acid water has neither of these problems. Unfortunately, it would take some very creative plumbing to put the machine under the sink. The Watershed also sells a shower filter to remove chlorine, which is important. Chlorine is quite toxic when inhaled. A shower filter should be of the copper-zinc variety because it will not clog up, has a long life, and restricts the water flow little.