Micron Cartridge FiltersPermionics offers corrosion resistant FRP cartridge filter housings for final polishing filtration. In most RO plants, the feed is acidified before the cartridge filter. SS or MSRL filters are required to prevent corrosion. Invariably when HCl is used, corrosion sets in even in stainless steel. But in the case of FRP, there is no chance of corrosion.20 years of experience in using FRP in cartridge filters has enabled us to perfect the design for ease in operation and minimal space consumption per unit cartridge.