Blue-green stains creeping around your sinks, bathtubs, or even on your drinking glasses are more than just unsightly—they signal copper leaching from your home’s pipes into your water. This corrosion not only tarnishes your fixtures with stubborn discoloration but also risks costly plumbing damage and potential health concerns. Ignoring these vivid stains means watching your home’s value and comfort slowly erode.

The system that fixes it

The Pentek Blue-Green Copper Stains System is engineered precisely to tackle the root cause of blue-green discoloration—acidic water leaching copper from your piping. At its core is the Pentek-series backwashing control valve, a robust, serviceable valve that intelligently manages system regeneration, ensuring your water treatment operates flawlessly over time. This valve’s genuine brand quality means easier maintenance and unmatched reliability, avoiding the common pitfalls of generic, hard-to-service alternatives.

Built upon an upflow calcite tank, the system employs premium calcite neutralizing media to naturally raise the water’s pH. By neutralizing acidity, it halts copper corrosion at its source, preventing the telltale stains before they start. Every element of this system is designed to work in harmony, offering you a clean, protected water supply and safeguarding your home’s plumbing infrastructure.

• Durable Pentek-series backwashing control valve for consistent, easy regeneration cycles.
• Upflow calcite tank design that optimizes media contact and system longevity.
• Calcite neutralizing media that raises pH to prevent copper leaching and staining.
• Genuine, serviceable components simplifying upkeep and extending system life.
• Engineered specifically for blue-green copper stain elimination, not just generic water treatment.

Pick your size

Choosing the right size depends on your home's bathroom count and water usage to ensure optimal stain control and lasting protection.

What it does for your home

• Eradicates blue-green copper stains from sinks, tubs, and fixtures, restoring spotless surfaces.
• Prevents further copper corrosion, protecting your plumbing and extending its lifespan.
• Delivers clean, clear water free from discoloration and unpleasant metallic tastes.
• Reduces costly repairs by stopping acidic water from damaging pipes and appliances.
• Enhances the aesthetic appeal and value of your home by eliminating visible stain damage.
• Improves your family’s health and comfort by reducing copper exposure and related contaminants.

With the Pentek Blue-Green Copper Stains System, your home’s water and plumbing stay cleaner, safer, and more reliable.

How the media works

The heart of this system is the calcite neutralizing media, a naturally occurring mineral that gently raises the pH level of your water. Acidic water is the culprit that dissolves copper from your pipes, leading to those stubborn blue-green stains. When water passes through the calcite media, it becomes less acidic—effectively neutralizing the corrosive effect. This simple chemical adjustment stops copper from leaching into your water supply, preventing stains and protecting your entire plumbing system from further damage. The media continuously works to balance your water’s chemistry, creating a safer, cleaner water environment throughout your home.

Why buy this system from us

We provide the complete Pentek Blue-Green Copper Stains System using only genuine, serviceable brand hardware—so you can count on easy maintenance and dependable repairs down the line. Our team offers free sizing consultation across the US, ensuring you select the perfect system tailored to your home’s needs. Plus, enjoy free shipping anywhere in the US with every purchase, making your path to stain-free water seamless and affordable. This matched, one-brand build guarantees compatibility and performance, delivering a worry-free solution you can trust for years to come.

Common questions

Q? How quickly will I see the blue-green stains disappear after installing the system?
A The system stops new copper stains immediately by neutralizing acidic water, but existing stains on fixtures may take cleaning to fully remove. You'll notice no new discoloration forming within days of use.

Q? Can this system handle water with varying acidity levels?
A Yes, the calcite neutralizing media adjusts to different acidity levels by raising pH as needed, effectively protecting your pipes regardless of fluctuations in water chemistry.

Q? Why is the Pentek-series backwashing control valve important?
A This valve automates the cleaning (backwashing) of the media tank, maintaining optimal performance and lifespan. Being a genuine and serviceable Pentek valve ensures reliable operation and easy maintenance whenever needed.

Shop the Pentek Blue-Green Copper Stains System →

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