RKIN RO systems (Flash, U1, Zero Installation Purifier) filter PFAS and microplastics down to 0.0001 microns — far smaller than both PFAS molecules and microplastic particles. Our carbon-based systems (OnliSoft) reduce but do not fully remove PFAS. Filter life is unchanged by PFAS or microplastic presence.
ZIP Indicator Light
Green light = filter is working. Red light = time to replace. The indicator is usage-based (water volume), not time-based — it resets automatically when you install a new filter.
Apr 7, 2026