HomeReplacement Water FilterPre-filter 5µContact Us to PurchaseFeatures For big blue housing use. High flow rate applications. Traps dirt, rust, and other impurities. Specification Model Type Spec. Remark FT-0025-1 commercial grade 20" Note Do not use where the water is microbiologically unsafe or of unknown quality without adequate disinfection before or after the unit. The system is to be supplied only with cold water. The system and installation shall comply with applicable state and local regulations.