RephiDuo U Pack RR600Q201, RR600Q301, RR600Q2KT, RR600Q3KT is designed for removing ionic and organic contaminants below trace level to match the water quality required for your application. Purification Technologies:  Ion-exchange resins for removing trace level ionic contaminants Activated carbon for trace level of organic contaminants Suitable for Direct-Pure water systems: Direct-Pure Genie Direct-Pure UP Direct-Pure adept PURIST Pro Order Information: