How do you maintain and regenerate an ion exchange resin system for long-term performance? Proper maintenance extends resin life from 3 to 10 years. Regeneration frequency depends on feed water quality and usage volume; for a hospital water softener, this might be every 2–7 days. A strong brine solution (sodium chloride) is used for cation resins, while sodium hydroxide or hydrochloric acid regenerates anion resins. Key maintenance steps include: monitoring pressure drop across the resin bed (a sudden increase suggests fouling or channeling), checking effluent water quality with conductivity or hardness tests, and backwashing the bed monthly to remove trapped particles. If resin becomes fouled by iron or organic compounds, chemical cleaning with acid or bleach solutions (diluted and carefully timed) can restore capacity. Always replace resin when regeneration chemical consumption rises by more than 20% for the same water output, or when treated water quality no longer meets specifications. Store spare resin in sealed, moist containers — never let resin dry out, as shrinking cracks destroy the beads permanently. https://www.molewater.com/ion-exchange-resin