Well Water Defense, Restored Maintain peak filtration performance with this dual-cartridge refill set for the Santé Ultimate Dual KDF Shower Filter (Well Water version). Formulated specifically for private wells, this refill set contains two powerful KDF-55 cartridges designed to target iron, sulfur odors, heavy metals, and bacteria—without sacrificing water pressure*. ✔ Reduces hydrogen sulfide (rotten egg smell), iron, manganese, and scale ✔ Dual-chamber design for longer contact time and deeper filtration ✔ Refill every 9–12 months for optimal performance ✔ Quick and tool-free installation Clean water isn’t just for drinking—give your skin and hair the protection they deserve with every shower.