Omnipure OMNIPURE-E5720-P Scale Inhibitor Cyst Water Filter Provides premium quality filtration for a fraction of the price of compatible Everpure filters Phosphate scale inhibitor protects your valuable beverage equipment from the harmful effects of hard water for up to 3000 gallons of use Every E-Series filter is independently tested to ensure quality and performance Designed with a durable polypropylene body for use in commercial beverage and food service applications