Blue-green stains creeping around your sinks, bathtubs, and faucets aren’t just an eyesore—they’re a glaring warning that copper is leaching from your pipes into your water. Over time, these corrosive stains can damage your plumbing connections, dull your fixtures, and even affect your family’s comfort and health. Ignoring these vibrant discolorations risks costly corrosion repairs and persistent water quality issues that undermine your home’s safety and value.

The system that fixes it

Introducing the C-Series Blue-Green Copper Stains System, expertly engineered to tackle the root cause of these stubborn stains: acidic water that dissolves copper from your pipes. At the heart of this system lies the robust C-Series backwashing control valve—a precision-engineered head valve that automates the cleaning of your media bed, ensuring peak performance without manual intervention. This genuinely serviceable brand valve isn’t just a component; it’s a cornerstone of reliability, designed for easy maintenance and long-term durability, setting it apart from generic or disposable alternatives.

The system is built upon a tough upflow calcite tank that houses the calcite neutralizing media. This media gradually raises your water’s pH, neutralizing acidity so it no longer eats away at copper plumbing. This thoughtful combination restores the water balance, halting the leaching process and stopping blue-green stains at their source.

• Automatic backwashing control valve for self-cleaning and consistent media performance
• Upflow calcite tank design that prevents channeling and maximizes media contact
• Calcite neutralizing media that raises pH to protect copper pipes from corrosion
• Genuine, serviceable branded valve ensuring easy future servicing and parts availability
• Durable construction tailored to long-lasting water conditioning and stain prevention

Pick your size

Select the size that matches your home’s bathroom count to ensure enough capacity to treat all your water consistently, keeping copper stains under control without compromise.

What it does for your home

• Eliminates blue-green copper stains on sinks, tubs, and fixtures by stopping acidic water corrosion
• Protects copper plumbing from ongoing leaching, extending pipe lifespan and reducing repairs
• Restores clear, stain-free water, enhancing your home’s appearance and comfort
• Prevents buildup that can clog faucets and damage appliances connected to your water supply
• Improves water taste and odor by stabilizing pH balance
• Delivers peace of mind with a reliable, low-maintenance system designed specifically for copper stain issues

With the C-Series Blue-Green Copper Stains System, you’re investing in long-term cleanliness, comfort, and savings.

How the media works

At the core of this system's stain-fighting power is the calcite neutralizing media—a naturally occurring mineral that gently raises the pH level of your water. Acidic water is the culprit behind copper pipes dissolving and leaving those unsightly blue-green stains. When water flows through the calcite media inside the upflow tank, it becomes less acidic, effectively stopping the chemical reaction that causes copper to leach. This process not only protects your plumbing but also helps maintain healthier, more balanced water throughout your home.

Why buy this system from us

Choosing the C-Series Blue-Green Copper Stains System means you’re getting more than a water treatment device—it’s a commitment to quality and service. Our system features a genuine, fully serviceable branded control valve, a rare find in today’s market where many valves are non-repairable and disposable. We also offer free sizing support for US homes, ensuring the perfect fit for your needs, along with free shipping across the US. Every part of this system is matched for compatibility and performance from a trusted single brand, giving you confidence in your investment.

Common questions

Q? How does this system prevent blue-green stains from coming back over time?
A The system continuously raises your water’s pH with calcite media, stopping acidity that causes copper to leach. The backwashing control valve keeps media clean and effective, ensuring ongoing protection without manual upkeep.

Q? Will this system affect my water’s taste or other qualities?
A By neutralizing acidity, the system improves water balance, which often results in better taste and reduced metallic odors or aftertastes caused by copper contamination.

Q? What sets your control valve apart from others on the market?
A Our C-Series backwashing control valve is a genuine, fully serviceable brand valve—designed for reliability and repairability. Unlike generic valves, it offers easy access to replacement parts and professional servicing options, extending the life of your system.

Shop the C-Series Blue-Green Copper Stains System →

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