When your sinks, tubs, and toilets are marred by stubborn black spots that no cleaner can erase, you're facing more than just an eyesore. Black manganese stains don't just discolor your fixtures—they signal high manganese levels that can degrade pipes, ruin appliances, and leave your family exposed to unpleasant tastes and potential health concerns. Over time, these stains embed deeper, causing costly damage and constant frustration in your daily water use.

The system that fixes it

The heart of the system is an air-injection oxidizing tank designed to maximize contact between water, air, and the powerful Katalox Light manganese-dioxide media inside. This media transforms dissolved manganese into solid particles that get trapped within the tank bed and are thoroughly flushed out during backwash, leaving your water crystal clear and stain-free.

• Robust oxidizing tank construction designed for consistent, efficient air contact.
• Katalox Light manganese-dioxide media specifically formulated to trap manganese solids.
• Fully automatic regeneration cycles ensure continuous protection without manual intervention.
• Durable, serviceable Fleck valve with widely available parts for easy upkeep.

Pick your size

Select the size that matches your household’s bathroom count for effective, uninterrupted manganese stain removal tailored to your needs.

What it does for your home

• Eradicates black manganese stains from toilets, sinks, tubs, and plumbing fixtures.
• Prevents manganese buildup that can clog and corrode pipes and appliances.
• Restores water clarity and taste, removing the metallic aftertaste manganese often causes.
• Protects laundry and dishes from unsightly black spotting and discoloration.
• Reduces costly repairs by minimizing manganese-related scaling within your plumbing system.
• Improves overall home water quality, enhancing comfort and peace of mind for your family.

With this system, your home is shielded from the persistent damage and inconvenience of manganese contamination.

How the media works

The secret lies in the Katalox Light manganese-dioxide media, a specially engineered mineral that acts like a magnet for manganese dissolved in your water. As water passes through the media bed, manganese particles are oxidized—chemically transformed from dissolved ions into solid particulate matter. These solids are then trapped inside the tank’s media bed, effectively removing manganese before it can stain your surfaces. During backwash cycles, the system flushes out these trapped solids, resetting the media to continue capturing more manganese. This natural, chemical-free process ensures your water remains free of manganese without harmful additives.

Why buy this system from us

• Free sizing consultation to ensure you get the perfect system tailored to your black manganese stain problem.
• Complimentary shipping within the United States for a hassle-free buying experience.
• Complete one-brand build means all parts are perfectly matched for maximum reliability and performance.

Common questions

Q? How quickly will I see black manganese stains disappear after installing this system?
A The Fleck Black Manganese Stains System begins oxidizing and removing manganese immediately. Most homeowners notice a significant reduction in stains within a few days as accumulated manganese residues rinse away.

Q? Can this system handle water with high manganese levels without frequent maintenance?
A Yes. The air-injection valve and Katalox Light media are designed for high-capacity manganese removal, and the automatic backwash cycles keep the media clean and effective, minimizing upkeep.

Shop the Fleck Black Manganese Stains System →

Prefer another valve brand? The same fix comes in Fleck, Autotrol, C-Series, Pentek and Pentair.