
Whole House Dual Water Filtration Systems
20" Big Blue Whole House Water Filtration System - this water treatment system treats all of the water entering your home, removing sand, silt, sediment, rust and other particles that can damage your water softener, prematurely foul carbon filters or ruin the plumbing fixtures and valves. AB-SINGLE 20 BIG BLUE Housing System effectively eliminates many impurities from tap water to offer sparkling clean and great tasting water throughout your whole house.

UPC 702338788901
Applications
WHOLE HOUSE OR WATER TANK FILTER SYSTEM
Ideal for various residential, commercial, and industrial applications including:
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Food and beverage processing
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Reverse osmosis pre-filtration
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Oil and gas industries
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Fine chemical filtration
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Electronics manufacturing
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Metal finishing processes
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Pulp and paper production
Kit Includes:
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1 x 20" Big Blue Water Filter Housing
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1 x 20" x 4.5" Water Filter Cartridge (Model: ABGAC-2045)
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1 x Heavy Duty Metal Mounting Bracket
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1 x Housing Wrench
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2 x Bushings (1" to 3/4")
GAC Granular Activated Coconut Carbon Filter Cartridge – 20" x 4.5" Refillable
This high-performance, refillable filter cartridge is compatible with all standard 20″ x 4.5″ Big Blue or Big White filter housings. It is designed to improve water quality by reducing:
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Sediment
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Chlorine
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Chemicals
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Bad taste
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Unpleasant odours
Features:
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Filter Media: Premium quality 12x40 mesh activated coconut carbon
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Design: Refillable canister for cost-effective reuse
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Includes: 5-micron sediment pads and internal screens for improved filtration
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Flow Rate: Up to 20L/min
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Max Pressure: 500 kPa
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Inspection & Cleaning: Canister can be opened for easy inspection and cleaning
This is a reliable solution for residential and commercial water filtration needs, especially in low-pressure systems.
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Compatible Models
Please refer to the product description above for compatible filter numbers, refrigerator models, and system model information.
If you cannot find your model number or are unsure whether this product is suitable for your system, please contact us before purchasing.
Contact Us for Compatibility SupportInstallation Guide
Please use the general guide below to help identify your filter type and follow the correct replacement process. Filter location and replacement steps may vary depending on your refrigerator or water filtration system model. Always refer to your appliance manual for the exact filter location and specific instructions.
Need Help Finding the Correct Filter?
Before ordering, compare your old filter, check the model number or filter code, and confirm the connector type. If you are unsure, please contact Water Filter Distributors for assistance.
Whole House System Installation Manual
For whole house filtration systems, please refer to the detailed installation manual below. Professional installation by a licensed plumber is recommended.
View Whole House Installation ManualTwin Cartridge Under Sink Installation Guide
For twin cartridge under sink systems, please refer to the installation guide below. This guide is suitable for systems supplied with a dedicated faucet, diverter valve, tubing and installation kit.
Important Notes
- Filter location and replacement steps may vary depending on your appliance or system model.
- Flush approximately 5–10 litres or 3–5 minutes of water after installation.
- Use with cold potable water only.
- Check for leaks after installation and reinstall if necessary.
- Always follow your appliance manufacturer's instructions.
Certification & Quality Assurance
Water Filter Distributors is operated by Mexi Trading Pty Ltd, an Australian owned and operated company. Our products are supplied with a strong focus on quality, safety and trusted filtration performance.
Important Certification Notice
- Certification details may vary depending on the specific product model.
- Please refer to the product description, packaging or official documentation for model-specific certification information.
- If you require confirmation for a specific product, please contact Water Filter Distributors before purchasing.