🌊 Product Overview
The LiquaGen 4.5” x 20” GAC/UDF + Phosphate Crystals Filter Cartridge is our largest dual-stage Big Blue cartridge, combining Granular Activated Carbon (GAC/UDF) with phosphate crystals for superior water treatment. The GAC/UDF layer reduces chlorine, taste, odor, and organic contaminants, while the phosphate crystals prevent scale buildup and protect plumbing and appliances from corrosion.
With its 4.5” diameter and 20” length, this cartridge delivers maximum media volume, longer service life, and higher flow capacity, making it the ideal choice for whole-house water systems, high-demand households, and light commercial setups.
✨ Key Benefits & Features
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💧 Two-in-One Filtration – GAC/UDF improves taste and clarity while phosphate crystals prevent scaling and corrosion.
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🛡️ Scale Protection – Forms a thin protective film inside pipes and heaters to combat mineral buildup.
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🚿 Big Blue Whole-House Ready – Designed for 4.5" x 20” housings to provide high-capacity treatment.
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🔧 Universal Compatibility – Fits all standard 4.5” x 20” Big Blue filter housings.
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🏠 Extended Lifespan – Treats more water and requires fewer replacements than shorter cartridges.
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♻️ Easy Maintenance – Drop-in replacement; recommended change every 4–6 months depending on water quality.
📋 Technical Specifications
| Parameter | Details |
|---|---|
| Model | LiquaGen 4.5” x 20” GAC/UDF + Phosphate Filter |
| Size | 4.5” x 20” (Big Blue Cartridge) |
| Media Type | Granular Activated Carbon (GAC/UDF) + Phosphate Crystals |
| Micron Rating | 5 nominal |
| Primary Functions | Chlorine, taste, odor reduction + scale prevention |
| Capacity | ~12,000–15,000 gallons (varies by water quality) |
| Recommended Lifespan | 4–6 months |
| Max Pressure | 90 PSI (6.2 bar) |
| Operating Temp. | 40–100°F (4.4–37°C) |
| Housing Compatibility | Fits all standard 4.5" x 20” Big Blue housings |
🏠 Applications
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🚰 Whole-House Filtration – Supplies cleaner, chlorine-free, and scale-protected water across the home.
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🧊 Kitchen & Drinking Water – Improves taste and odor for cooking and beverages.
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🚿 Bathroom & Laundry – Reduces staining, odor, and scale buildup in showers, sinks, and washing machines.
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🏠 Appliance Protection – Extends the lifespan of dishwashers, coffee machines, and water heaters.
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🏢 Light Commercial Use – Suitable for cafés, restaurants, and offices with higher water demands.
💙 Why Choose LiquaGen?
The LiquaGen 4.5” x 20” GAC/UDF + Phosphate Crystals Filter Cartridge delivers maximum performance and capacity, combining advanced carbon filtration with phosphate protection in a high-flow Big Blue format. Perfect for households and businesses needing long-lasting chlorine, taste, and odor removal with scale prevention, this cartridge ensures reliable, fresh, and protected water.