A.O. Smith AO-WH-DSCLR Whole House Salt-Free Descaler 600K Gal 6-Year Warranty
Includes descaler unit, shut-off valve, hose adapter, and nipple – new and unopened. Effective for water hardness under 15 grains per gallon and pH under 8.3. Rated for up to 600,000 gallons or 6 years of use, it works effectively on both city and well water supplies.