Black manganese stains ruin your home's surfaces with ugly, stubborn black or dark gray streaks, spots, and discoloration. These unsightly marks show up on sinks, tubs, toilets, and fixtures, turning everyday cleaning into a losing battle. Left unchecked, manganese staining damages plumbing, appliances, and can compromise your water’s taste and clarity, costing you time, money, and peace of mind.

The system that fixes it

The C-Series Black Manganese Stains System is engineered precisely to eliminate this problem at its source. At its heart is the C-Series air-injection control valve, a genuine brand valve designed not just to control your system but to actively inject air into the water stream. This air injection oxidizes manganese ions, turning them into solid particles trapped inside the system. The water then flows through an air-injection oxidizing tank filled with Katalox Light manganese-dioxide media. This powerful media works by chemically transforming dissolved manganese into solid deposits that remain trapped in the media bed until they are flushed away during backwash cycles. The system’s integrated design ensures reliable manganese removal, protects your plumbing, and keeps your water crystal clear and stain-free.

• C-Series Air-Injection Control Valve: Injects air for manganese oxidation, optimizes backwash, and is fully serviceable for long-term reliability.
• Air-Injection Oxidizing Tank: Supports consistent oxidative action, maximizing manganese removal efficiency.
• Katalox Light Media: High-performance manganese-dioxide media that traps oxidized manganese solids inside the bed.
• Genuine Brand Valve: Ensures parts availability and easy servicing, avoiding costly downtime.
• Backwash Cycle Functionality: Removes trapped solids regularly to maintain system effectiveness and longevity.

Pick your size

Select the system size that matches your home's bathroom count to ensure effective manganese removal and long-lasting stain protection.

What it does for your home

• Eliminates black manganese stains on sinks, tubs, toilets, and fixtures.
• Prevents manganese buildup that clogs and damages plumbing and appliances.
• Delivers clean, clear water that improves water taste and appearance.
• Reduces ongoing maintenance and costly surface repairs caused by staining.
• Protects your home’s value and enhances the aesthetic appeal of water-contact surfaces.
• Improves comfort and confidence in your household water quality.

With the C-Series Black Manganese Stains System installed, your home stays spotless, your plumbing stays safe, and you save money on stains and damage repairs.

How the media works

The system’s secret weapon is Katalox Light manganese-dioxide media. This media acts like a chemical magnet for manganese in your water. When the water passes through the tank, the air-injection valve adds oxygen, which oxidizes soluble manganese ions, turning them into solid particles. The Katalox media then traps these solids, holding them in the bed until the system periodically flushes them away during the backwash cycle. This process effectively removes manganese before it can cause staining, ensuring the water flowing out is clean and free of the dark deposits that ruin your home surfaces. Simply put, the media transforms and captures manganese, stopping stains before they start.

Why buy this system from us

• Equipped with a genuine, fully serviceable C-Series air-injection valve for easy maintenance and long-lasting performance.
• Free sizing advice tailored to your home's specific bathroom count and manganese levels.
• Free shipping anywhere in the US—delivered hassle-free to your doorstep.
• Complete one-brand system build ensures all parts work seamlessly together, boosting reliability and peace of mind.
• Expert customer support focused on solving black manganese stain problems effectively.

Common questions

Q? Will this system remove all black manganese stains permanently?
A The C-Series Black Manganese Stains System oxidizes and traps manganese before it deposits, preventing further stains. Existing stains on surfaces may require cleaning, but ongoing staining will stop with correct installation and maintenance.

Q? How often does the system need backwashing to flush out manganese solids?
A Backwash frequency depends on your water usage and manganese levels, but the air-injection valve automates this process to maintain optimal media performance and prevent manganese buildup within the tank.

Q? What happens if I have more bathrooms than the recommended size?
A For larger homes or higher water demand, selecting the next size up ensures the system effectively handles manganese removal without premature media exhaustion or reduced capacity.

Shop the C-Series Black Manganese Stains System →

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