The product is brand NEW, but the retail box is open and has cosmetic damage.

Rinnai 103000039 Scale Cutter Water Conditioning System Replacement Filter

• Keeping scale-causing minerals in solution inhibiting lime scale formation
• Changes the shape of precipitated lime scale preventing accumulation
• Coats wetted surfaces with a micro-thin layer that provides corrosion control
• Helps soften and remove existing lime scale over time