About Softener Sleuth
Softener Sleuth is an independent independent reference site for homeowners planning water treatment projects water softener sizing, whole-house filtration, and reverse osmosis costs. We build calculators and estimators and guides that answer the questions that matter: what size softener do you need, and what will it roughly cost?
How our numbers work
Every calculator runs on standard water hardness data and softener sizing standards, the same figures used by water quality labs and equipment manufacturers. Each formula is checked by hand against worked examples before it ships. Prices on this site are always shown as ranges with an "as of" date, because equipment and installation costs vary by region and job complexity. We never publish a made-up statistic.
What we are not
We are not a water treatment company, a contractor, or a plumber. Our numbers are planning estimates, not professional recommendations. For anything safety-related or permanently installed, confirm with a qualified water treatment specialist or a licensed plumber before you buy or install. Building codes, water quality regulations, and manufacturer requirements always take priority.
Corrections
If a number on this site looks wrong, we want to know. Email hello@water-treatment.pages.dev and we will check it against our sources and fix it quickly. Getting the math right is the whole point of this site.