Twin 20″ Big Blue Whole House Rainwater & Mains Water Filtration System
The Twin 20″ Big Blue Whole House Water Filtration System is a high-flow, two-stage water filtration solution designed for Australian homes, farms, rural properties and businesses using rainwater tanks or mains water supplies.
Featuring a 20″ × 4.5″ washable sediment filter and a 20″ × 4.5″ silver-impregnated carbon block filter, this system helps reduce sediment, chlorine, unpleasant tastes and odours while providing bacteriostatic protection within the carbon filter media.
Designed for whole-house installation, the twin Big Blue filtration system helps improve water quality throughout your property while protecting household plumbing, appliances and downstream water treatment equipment.
Two-Stage Water Filtration Process
Stage 1 – 5-Micron Washable Sediment Filter
The first stage features a 20″ × 4.5″ 5-micron pleated washable sediment cartridge.
This filter helps capture:
- Dirt, sand and silt
- Rust and suspended particles
- Sediment commonly found in rainwater tanks
- Particulate matter entering household plumbing
Removing sediment at the first stage helps improve water clarity and protects the second-stage carbon cartridge from premature sediment build-up.
The pleated cartridge can be washed and reused according to the manufacturer’s instructions, providing a practical and economical filtration solution.
Stage 2 – 5-Micron Silver-Impregnated Carbon Block Filter
The second stage features a 20″ × 4.5″ 5-micron silver-impregnated carbon block cartridge.
The activated carbon helps reduce chlorine, unpleasant tastes, odours and certain organic contaminants, depending on water quality and cartridge performance.
The silver impregnation provides bacteriostatic protection, helping inhibit bacterial growth within the filter media.
This makes the system a practical filtration option for rainwater and tank water supplies where additional sediment and carbon filtration is required.
Key Features & Benefits
- Twin 20″ Big Blue Filter Housings: Large-capacity filtration housings designed for whole-house applications.
- Two-Stage Filtration: Combines sediment removal with activated carbon filtration.
- 5-Micron Washable Sediment Cartridge: Helps capture dirt, rust, sand and suspended particles.
- 5-Micron Silver Carbon Block: Helps reduce chlorine, unpleasant tastes and odours while inhibiting bacterial growth within the filter media.
- Whole House Rainwater Filtration: Suitable for filtering stored rainwater before distribution throughout the property.
- Mains Water Filtration: Helps improve the taste and clarity of mains water.
- High-Flow Design: Suitable for applications requiring filtration throughout the household, subject to cartridge and installation specifications.
- Stainless Steel Mounting Bracket: Provides secure support for the filtration system.
- Two Pressure Gauges: Allow convenient monitoring of water pressure across the filtration system.
- Filter Spanner Included: Assists with filter housing maintenance and cartridge replacement.
Ideal for Rainwater Tank Filtration
Rainwater collected from roofs and stored in tanks can contain sediment, organic matter and other impurities.
The Twin 20″ Big Blue rainwater filtration system combines sediment and carbon filtration to help improve water clarity, taste and odour.
Its larger 20-inch cartridges provide increased filtration surface area compared with equivalent 10-inch cartridges, making the system suitable for properties with higher water demands.
The system can also be installed before UV disinfection equipment as part of a more comprehensive rainwater treatment setup.
Recommended Applications
- Whole house rainwater filtration
- Rainwater tank filtration
- Mains water filtration
- Rural homes and farms
- Off-grid properties
- Household sediment and carbon filtration
- Pre-filtration before UV disinfection
- Properties requiring larger-capacity filter cartridges
Rainwater & Mains Water Filtration
Whether your property relies on stored rainwater or mains water, the Twin 20″ Big Blue system provides two complementary filtration stages.
For rainwater supplies, the washable sediment cartridge helps capture suspended particles, while the silver-impregnated carbon cartridge provides additional filtration and bacteriostatic protection within the filter media.
For mains water supplies, the system helps reduce sediment, chlorine, unpleasant tastes and odours.
Important: Silver-impregnated carbon filtration is not a substitute for UV disinfection. This system does not include a UV steriliser and should not be relied upon to disinfect untreated rainwater intended for drinking.
Why Buy From Aus Water Tanks?
Over 30 Years of Rainwater Industry Experience
With over 30 years of experience in the Australian rainwater industry, Aus Water Tanks supplies practical water filtration solutions for homes, farms and businesses throughout Australia.
Our product range includes whole house water filtration systems, rainwater tank filtration, reverse osmosis drinking water systems and replacement filter cartridges.
Quality Water Filtration at Competitive Prices
As a family-run Australian business, we focus on quality filtration products, competitive pricing and helpful product advice.
Our experienced team can assist with selecting filtration equipment suitable for your water supply and household requirements.
Complete Rainwater Solutions
Aus Water Tanks also supplies rainwater tanks, water pumps, filtration accessories and replacement filter cartridges.
We understand how rainwater storage, pumping and filtration equipment work together.
Australia-Wide Delivery
Aus Water Tanks supplies whole house rainwater filtration systems, mains water filters and replacement cartridges Australia-wide.
Contact our experienced team for product advice, availability and freight options.
Experience You Can Rely On
With over 30 years of water industry experience, Aus Water Tanks combines quality products with practical filtration knowledge.
Shop Online and Save – Australia-Wide Delivery
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