Whirlpool Water Softener Cleanser 16 Ounces Whirlpool water softener cleanser maintains your water softeners peak efficiency and performance Helps remove harmful deposits from your water softeners resin bed, valve and system Recommended use of this product will extend the warranty of any new Whirlpool water softener purchase from 1 up to 10 years full parts and labor Recommended use every 4 months