Picking a water softener comes down to three numbers: your water hardness, your household size, and your peak water use. Get those right and the system runs efficiently for years; get them wrong and you'll waste salt or run out of soft water.
1. Test your water hardness
Hardness is measured in grains per gallon (gpg). City water is often 3–15 gpg; well water can exceed 25 gpg, sometimes with iron that adds to the load. A simple test strip or your utility's water report gives you the number.
2. Size the system (grain capacity)
Multiply people × gallons/day (~75) × hardness to estimate daily grain removal, then choose a system sized for ~7 days between regenerations. Our water softener sizing chart walks through the math. When in doubt, size up one tier — an oversized softener regenerates less often and uses less salt.
3. Choose the control valve
The valve is the brain of the softener. Fleck and Clack metered valves are the industry standard for reliability and easy servicing — and you can grab the free service manuals for every model. Metered (demand) regeneration beats timer-based for efficiency.
4. Salt-based vs. salt-free
Salt-based ion-exchange softeners actually remove hardness minerals (best for scale and soap performance). Salt-free conditioners reduce scale buildup without removing minerals — a good fit where sodium is a concern.
Browse residential water softeners or talk to us about your test numbers — we'll size it with you.