2.5" x 20" BIRM / KDF 85 Filter Cartridge (Iron, Manganese, Sulfur & Rotten Egg Smell Reduction) - LiquaGen Water
2.5" x 20" BIRM / KDF 85 Filter Cartridge (Iron, Manganese, Sulfur & Rotten Egg Smell Reduction) - LiquaGen Water
2.5" x 20" BIRM / KDF 85 Filter Cartridge (Iron, Manganese, Sulfur & Rotten Egg Smell Reduction) - LiquaGen Water
2.5" x 20" BIRM / KDF 85 Filter Cartridge (Iron, Manganese, Sulfur & Rotten Egg Smell Reduction) - LiquaGen Water
2.5" x 20" BIRM / KDF 85 Filter Cartridge (Iron, Manganese, Sulfur & Rotten Egg Smell Reduction) - LiquaGen Water
2.5" x 20" BIRM / KDF 85 Filter Cartridge (Iron, Manganese, Sulfur & Rotten Egg Smell Reduction) - LiquaGen Water
2.5" x 20" BIRM / KDF 85 Filter Cartridge (Iron, Manganese, Sulfur & Rotten Egg Smell Reduction) - LiquaGen Water
2.5" x 20" BIRM / KDF 85 Filter Cartridge (Iron, Manganese, Sulfur & Rotten Egg Smell Reduction) - LiquaGen Water
LiquaGen Water

2.5" x 20" BIRM / KDF 85 Filter Cartridge (Iron, Manganese, Sulfur & Rotten Egg Smell Reduction)

Regular price $105.00 Sale price $77.99

🌊 Product Overview

The LiquaGen 2.5” x 20” Birm / KDF85 Filter Cartridge is a refillable slimline cartridge designed to reduce iron, manganese, and hydrogen sulfide (rotten egg smell) from your water supply. Using a proven blend of Birm media and KDF85 granules, it provides dual-stage protection against staining, odors, and metallic taste while keeping your plumbing and appliances cleaner and longer-lasting.

Built for standard 2.5” x 20” filter housings, this cartridge offers extended capacity and longer service life than 10” models, making it ideal for whole-house slimline systems, RO pre-filtration, and residential well water treatment where low to moderate iron and sulfur levels (<5 ppm) are present.


✨ Key Benefits & Features

  • 🛡️ Iron & Manganese Reduction – Removes metallic taste, discoloration, and staining from fixtures and laundry.

  • 💧 Rotten Egg Smell Control – Eliminates foul odors caused by hydrogen sulfide.

  • 🌱 Dual Media Blend – Birm enhances iron/manganese removal, while KDF85 reduces sulfur, scale, and bacteria.

  • 🔧 Slim 20” Compatibility – Fits all standard 2.5” x 20” slim filter housings.

  • 🚿 Cleaner, Fresher Water – Improves water clarity and makes it safer for household use.

  • ♻️ Easy Maintenance – Drop-in replacement with no backwashing or regeneration required.

  • 🦠 Bacteriostatic Protection – KDF85 helps inhibit bacteria and algae growth inside the cartridge.

  • ⏱️ Extended Service Life – Provides up to 4,000–6,000 gallons, depending on water quality.


📋 Technical Specifications

Parameter Details
Model LiquaGen 2.5” x 20” Birm / KDF85 Filter Cartridge
Size 2.5” x 20” (Slim Cartridge)
Media Type Birm + KDF85
Primary Functions Reduces iron, manganese, and hydrogen sulfide
Capacity ~4,000–6,000 gallons (varies by water quality)
Recommended Lifespan 6–12 months (residential use)
Max Flow Rate 1.0–2.0 GPM
Max Pressure 90 PSI (6.2 bar)
Operating Temp. 40–100°F (4.4–37°C)
Required pH Range 6.5 – 8.5
Recommended DO Level Iron level (ppm) × 0.6
Max Iron Level ≤ 5 ppm
Housing Compatibility Fits all standard 2.5" x 20” slim housings

🏠 Applications

  • 🚰 Drinking Water Systems – Reduces metallic taste and odor for better tap water.

  • 🧊 Reverse Osmosis Pre-Filtration – Protects RO membranes from iron and sulfur fouling.

  • 🏠 Whole-House Slimline Filtration – Provides iron- and odor-free water across sinks, showers, and appliances.

  • 🌾 Well Water Filtration – Perfect for homes with low to moderate iron and H₂S issues.

  • 🛁 Plumbing & Fixture Protection – Prevents staining and buildup in toilets, tubs, sinks, and laundry.


💙 Why Choose LiquaGen?

The LiquaGen 2.5” x 20” Birm / KDF85 Filter Cartridge delivers dual-media contaminant reduction in an extended slimline format. With longer service life, universal housing compatibility, and proven performance against iron, manganese, and sulfur odors, it ensures your water is clearer, fresher, and safer for your family.