Deliver clean, chlorine-free water throughout your entire home with the NU Aqua 4.5" x 20" Whole House Granular Activated Carbon (GAC) Filter. Engineered with advanced HydraCoil technology, this premium 5-micron replacement filter provides superior chlorine removal and contaminant reduction for whole home water filtration systems.
Advanced HydraCoil Technology
Unlike standard carbon filters, this NU Aqua GAC filter is manufactured using proprietary HydraCoil technology that restructures the molecular pores of the activated carbon. This innovative process creates a more permeable structure with dramatically increased surface area, allowing the filter to capture even the smallest particles while delivering up to 10 times the chlorine absorption capacity of conventional carbon filters.
Superior Chlorine Removal
Chlorine is the most common chemical added to municipal water supplies, and while it disinfects water, it also creates unpleasant taste, odor, and can dry out skin and hair. This premium GAC filter excels at chlorine removal, protecting your entire home from chlorine's harsh effects. Enjoy softer-feeling water for bathing, better-tasting water for drinking and cooking, and protection for your appliances and plumbing.
5 Micron Filtration
The 5-micron rating means this filter captures particles as small as 5 micrometers, effectively removing sediment, rust, sand, silt, and other particulates that can cloud your water and damage appliances. This fine filtration level provides excellent protection while maintaining strong water flow throughout your home.
Key Features & Benefits
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HydraCoil Technology - Advanced molecular structure for superior absorption and filtration
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10x Chlorine Capacity - Removes up to 10 times more chlorine than standard carbon filters
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5 Micron Filtration - Captures fine sediment, rust, and particulates
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Standard 4.5" x 20" Size - Universal fit for most whole house filter housings
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Granular Activated Carbon - High-capacity media for extended service life
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Whole Home Protection - Filters water at point of entry for complete coverage
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Premium Quality - Genuine NU Aqua replacement ensures optimal performance
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Easy Replacement - Standard size fits most 20" filter housings
What It Removes
This granular activated carbon filter effectively reduces:
- Chlorine and chlorine taste/odor (up to 10x capacity)
- Sediment and particulates (down to 5 microns)
- Rust and oxidized iron
- Sand and silt
- Volatile Organic Compounds (VOCs)
- Industrial solvents and chemicals
- Pesticides and herbicides
- Unpleasant taste and odor
- Turbidity and cloudiness
Benefits Throughout Your Home
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Kitchen - Better-tasting water for drinking, cooking, and ice making
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Bathroom - Softer water for bathing, gentler on skin and hair
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Laundry - Cleaner clothes without chlorine residue or chemical odors
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Appliances - Extended life for water heaters, dishwashers, and washing machines
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Plumbing - Reduced sediment buildup in pipes and fixtures
Universal Compatibility
The standard 4.5" x 20" dimensions make this filter compatible with most whole house water filtration systems, including NU Aqua systems and other major brands. It's designed as a direct replacement for existing GAC filters in standard 20-inch filter housings.
When to Replace Your Filter
Replace your GAC filter when you notice:
- Return of chlorine taste or odor in your water
- Reduced water flow or pressure
- Visible sediment or discoloration in filtered water
- 6-12 months have passed since last replacement (depending on water quality and usage)
- Increased sediment buildup in fixtures or appliances
Technical Specifications
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Filter Type: Granular Activated Carbon (GAC)
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Dimensions: 4.5" diameter x 20" length
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Micron Rating: 5 micron
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Technology: HydraCoil advanced molecular structure
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Chlorine Capacity: 10x standard carbon filters
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Application: Whole house water filtration (point of entry)
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Compatibility: Standard 20" filter housings
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Service Life: 6-12 months (varies by water quality and usage)
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Weight: 5.5 lbs
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Country of Origin: Taiwan
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SKU: WU-GAC20
Why Choose NU Aqua GAC Filters
NU Aqua's granular activated carbon filters represent the premium tier of whole house filtration. The proprietary HydraCoil technology sets these filters apart from commodity carbon filters, delivering superior performance, longer service life, and better value. When you choose genuine NU Aqua replacement filters, you're ensuring your whole house system operates at peak efficiency.
Perfect For
Ideal for homes with municipal water supplies that contain chlorine, homes with sediment issues, well water applications requiring carbon filtration, and anyone seeking whole-home water quality improvement. Compatible with NU Aqua whole house systems and most standard 20" filter housings from major brands.
Installation Tip: Always shut off water supply before replacing filters. After installing a new GAC filter, run water for 3-5 minutes to flush carbon fines and activate the filter media. This ensures optimal performance and clear water from the start.
Maintenance Recommendation: For best results, replace sediment pre-filters every 3-6 months and GAC filters every 6-12 months. Regular filter changes ensure consistent water quality and protect your plumbing and appliances from damage.
