The Pro Products RK41N is a professional-grade liquid resin cleaner specifically formulated to restore the efficiency of water softener resin beds. It removes iron, manganese, silt, and organic fouling that build up on ion-exchange resin over time. Regular use of RK41N helps extend the life of your softener, improves salt efficiency, and ensures consistent soft water output. This concentrated formula is sold as a 1-quart (32 oz) bottle by Pro Products, LLC.

Pro Products recommends using RK41N Liquid Resin Cleaner every 3 to 6 months for typical municipal water, and monthly for well water or water with high iron content (above 2 ppm). Consistent cleaning cycles with RK41N prevent iron fouling, which can permanently damage softener resin if left untreated. For best results, add the solution directly to the brine well or salt tank before a regeneration cycle.

The standard dosage for Pro Products RK41N is 4 ounces per cubic foot of resin for routine maintenance cleaning. For heavily fouled systems, Pro Products suggests 8 ounces per cubic foot. Pour the measured amount into the brine well, then manually initiate a regeneration cycle. A single 32 oz bottle of RK41N typically provides 4 to 8 treatments for a standard residential softener.

Yes, RK41N is formulated to be safe for all standard cation ion-exchange resins used in residential and commercial water softeners. The Pro Products formula is non-damaging to resin beads, plastic components, brass fittings, and stainless steel parts when used as directed. However, RK41N is intended strictly for softener maintenance and should not be used in reverse osmosis systems or drinking water filters.

Pro Products RK41N specifically targets iron (ferric and ferrous), manganese, silt, and organic matter that coat softener resin and reduce its ion-exchange capacity. While RK41N is a resin cleaning solution rather than a drinking water filter—so NSF/ANSI 42 or 53 certifications do not apply—it is manufactured by Pro Products, LLC, a trusted name in water treatment chemicals since 1946. Using RK41N as part of routine maintenance keeps your softener operating at peak efficiency for years.