The Salt-Free Water Conditioner Replacement Tank (replaces the WH-SFWC-S) protects your home's pipes, plumbing, and appliances from scale buildup without the use of harsh chemicals or salt. This system pairs with the Rhino® Rhino® 600,000 Gallons, and the Optim H2O® systems and lasts for up to 10 years. The Salt-Free Water Conditioner gives you whole home protection from the adverse effects of scale buildup. Extend the life of your plumbing, water heater, washing machine, dishwasher, and other appliances without adding excess salt waste, phosphates, or chemicals into the environment. With our Salt-Free Water Conditioner, water stains and spots are easier to wipe off. Aquasana's Scale Control Media technology prevents hard water minerals from binding and forming scale - all without the use of salt. Unlike salt-based water softeners, Aquasana's Salt-Free Water Conditioner won't demineralize your water. Experience delicious, salt-free drinking water and no soap lather change in the shower or while doing dishes. Aquasana's Salt-Free Water Conditioner is low maintenance and does not require electricity, drainage for wastewater, or heavy bags of salt to lug around. This tank's newly-improved divider valve enables a flow rate of up to 15.3 gallons per minute with no noticeable change in water pressure.Salt-Free Water Conditioner replacement tank to protect from scale buildup. Pairs with the Rhino®, Rhino® 600,000 Gallons, and the Optim H2O®.