This is where the magic happens. Your control valve has a tiny computer. You need to set three things: hardness level (in grains per gallon), capacity (how much water your system can treat before regenerating), and regeneration time. The hardness level is usually on your city water report or from a test kit. If you guess, guess high—it’s better to oversoften than undersoften.
How to install a water softener whirlpool – Artofit
Set regeneration to happen at 2 AM. Nobody showers at 2 AM, and you won’t hear the whoosh of water being flushed. My first setup, I set it for 6 PM. Strong mistake. I took a shower mid-regeneration and got a blast of salty, iron-tasting water. I smelled like a pretzel.