Aquasana Salt-Free Water Conditioner Replacement Tank for 6-Year, 600,000 Gallon Whole House Water Filter System, EQ-AST-WH

Replacements made easy - no plumber required. Replace tank every 6-years or 600,000 gallons.
No demineralization & no waste – does not chemically remove minerals from your water or put excess salt waste into our environment
Salt-Free Softener - natural salt-free softening to reduce scale build-up on internal pipes and plumbing without the use of chemicals