How It Works: Cleaner, Healthier Showers with Koia

Transform your daily shower into a moment of wellness with the Koia Shower Filter. Designed to remove chlorine, heavy metals and impurities. Our advanced filtration system helps support your skin, hair and overall health.

Gentle shower filters designed for sensitive skin types

What Is Hard Water and Why Is It Bad for You?

Hard water contains high levels of minerals like calcium, magnesium, iron, copper and lead. While these minerals may seem harmless, they can:

✔ Dry out your skin by stripping away natural oils.
✔ Cause buildup on your hair, making it look dull and lifeless.
✔ Leave residue on your shower surfaces, leading to limescale and soap scum.
✔ Expose you to harmful metals like lead and copper, which may have long-term health effects.

By filtering out these impurities, Koia helps you enjoy softer skin, shinier hair and a cleaner shower.

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Premium shower filters for Wellington homes

What’s Inside the Koia Shower Filter?

Filtration Layers

  • Sand Layer – Traps large particles like sand and debris.
  • Stainless Steel Mesh – Blocks medium-sized impurities.
  • Micro-Porous PP Cotton – Filters fine particles and dust for cleaner water.

Purification Elements

  • Calcium Sulfite – Removes chlorine in both hot and cold water.
  • KDF 55 – Reduces heavy metals such as lead, chromium, copper, mercury and nickel.
  • Granular Activated Carbon – Eliminates trihalomethanes (THMs) and bad odors.
  • Red Mineral Balls – Enhance oxygen levels for a refreshing shower.
  • Zeolite – Releases essential minerals to revitalize your water.
  • Vitamin C – Neutralizes chlorine while nourishing skin and hair.
  • Tourmaline – Supports filtration and adds beneficial minerals.

Is the Koia Shower Filter Compatible with My Shower?

Yes, the Koia Shower Filter fits standard 1/2-inch connections, making it universally compatible with most showers, including: Handheld showers, Rainfall showers, Fixed showerheads

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How do I install the Koia Shower Filter

No tools required, no fuss.

Step 1: Prep & Flush Your Purifier

Before installing, run water through your Koia Shower Filter to rinse out any loose carbon particles. You may notice dark or grey-tinted water at first—this is completely normal! Continue flushing until the water flows clear. Repeat on both ends.

Step 2: Remove Your Current Shower Head

Carefully unscrew your existing shower head by twisting it counterclockwise. Most can be removed by hand, but if it's too tight, use a wrench.

Step 3: Seal the Connection

Wrap the included Koia sealing tape tightly around the shower arm thread and purifier thread about 5-7 times to create a secure, leak-free seal. (There is no need to use the small, white rubber o-rings that came with the filter. The tape alone is sufficient enough).

Step 4: Attach Your Koia Shower Purifier

Screw your Koia Shower Purifier onto the shower arm by turning it clockwise until snug. Then, attach your shower head the same way, ensuring a firm connection. If additional tightening is needed, use a soft cloth and a wrench to gently secure it.

Think "righty tighty, lefty loosey" when installing or removing parts! Always turn clockwise to secure and counterclockwise to remove

Need help? Our support team is available to assist you.

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Eczema-safe shower filters to soothe sensitive skin

When Should I Replace My Filter?

To maintain optimal filtration, replace your Koia Universal Shower Cartridge:

  • Every 3 months for households of 4 or more people.
  • Every 6 months for households of 2 people.

Regular replacement ensures your filter continues removing chlorine, heavy metals, and other impurities for the freshest, cleanest shower experience.

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How to Replace Your Filter

Installing your Koia Shower Filter is quick and easy. Just flush the filter with water to remove any loose carbon particles. The water may appear dark or grey at first, but this is normal. Continue until the water runs clear. Then, twist open the casing, remove the old cartridge and replace it with the new one, ensuring the stainless steel mesh is at the top. That’s it! Your filter is ready to go.

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Have any other question?

Our support team is here to help! Just send us an email and we’ll provide step-by-step guidance to get you set up smoothly.

hello@koiacollection.co.nz