The LiquaGen 4.5” x 10” Birm + KDF-85 Filter Cartridge is a Big Blue refillable cartridge designed to reduce iron, manganese, and hydrogen sulfide (rotten egg odor) in residential and light commercial water systems.
By combining Birm media for iron and manganese reduction with KDF-85 granules for sulfur, scale, and bacteria control, this dual-media cartridge provides powerful contaminant protection. It helps keep your plumbing, fixtures, and appliances free from staining, foul odors, and metallic taste.
Built for Big Blue 4.5” x 10” housings, this cartridge is ideal for homes experiencing low to moderate iron or H₂S levels (≤5 ppm) while requiring higher flow and capacity than slimline filters can provide.
🛡️ Iron & Manganese Reduction – Eliminates metallic taste and prevents red/brown or black staining.
💧 Rotten Egg Odor Control – Removes hydrogen sulfide smells for fresher, odor-free water.
🌱 Dual Media Protection – Birm boosts iron/manganese removal; KDF-85 targets sulfur, scale & bacteria.
🔧 Big Blue 10” Fit – Compatible with all standard 4.5” x 10” Big Blue housings.
🚿 Cleaner, Fresher Water – Improves taste, clarity & odor throughout the home.
♻️ Easy Maintenance – Drop-in cartridge design, no backwashing or regeneration needed.
🦠 Bacteriostatic Properties – KDF-85 naturally inhibits bacteria, algae & biofilm growth.
⏱️ Reliable Capacity – Treats 4,000–5,000 gallons, depending on water quality.
Model: LiquaGen 4.5” x 10” Birm + KDF-85 Filter Cartridge
Size: 4.5” x 10” (Big Blue Cartridge)
Media Type: Birm + KDF-85
Functions: Reduces iron, manganese & hydrogen sulfide
Capacity: ~4,000–5,000 gallons (varies by water quality)
Lifespan: ~6 months (typical residential use)
Max Flow Rate: 2.0–3.0 GPM
pH Range: 6.5 – 8.5
Dissolved Oxygen Requirement: Iron (ppm) × 0.6
Max Iron Level: ≤ 5 ppm
Max Pressure: 90 PSI (6.2 bar)
Operating Temp: 40–100°F (4.4–37°C)
Housing Compatibility: Fits all standard 4.5” x 10” Big Blue housings
🚰 Whole-House Filtration – Delivers safer, fresher water across every tap.
🌾 Well Water Treatment – Reduces iron, manganese & sulfur in rural groundwater.
🧊 RO Pre-Filtration – Protects membranes from iron and H₂S fouling.
🛁 Bathroom & Kitchen Use – Prevents staining and odors in sinks, tubs & showers.
🧺 Appliance Protection – Extends lifespan of dishwashers, washing machines & water heaters.
The LiquaGen 4.5” x 10” Birm + KDF-85 Filter Cartridge is a compact Big Blue solution for tackling iron, manganese, and hydrogen sulfide contamination.
With its dual-media design, universal Big Blue compatibility, and proven performance, it delivers long-lasting protection against staining, odors, and metallic taste, ensuring fresher, cleaner, and safer water for your home.
✨ Dual-media iron + sulfur reduction
✨ Higher flow Big Blue format
✨ Reliable contaminant protection
✨ Trusted LiquaGen quality