Are you considering the Water Filter World Twin 20 Big Blue Whole Home Water Filter System for your household? This guide will provide you with a comprehensive overview of its features, benefits, and why it could be the ideal choice for ensuring clean and safe water throughout your home.
The Twin 20 Big Blue Whole Home Water Filter System offers high-performance filtration for a variety of contaminants, ensuring clean and safe water throughout the household.
Equipped with a two-stage filtration process and made from UV stabilized, BPA-free plastics, the system is designed for durability, efficiency, and health safety.
Professional installation and regular maintenance by licensed plumbers are essential for optimal performance and compliance with plumbing standards.

The Twin 20 Big Blue Whole Home Water Filter System stands as a paragon of household water filtration. Designed for high performance and efficiency, this system ensures that every drop of water entering your home is meticulously filtered for safety and cleanliness. Offering robust filtration capabilities, the Twin 20 Big Blue system is ideal for households looking to guarantee the purity of their water supply.
This 20 x 4.5 whole house water filter system is engineered to tackle a variety of contaminants, ensuring that your drinking and bathing water is free from harmful substances. Integrating this system into your home offers comprehensive protection for appliances and plumbing, along with cleaner, better-tasting water and effective water filters.
The Twin 20 x 4.5 Big Blue system is built with precise bigblue unit measurements dimensions that ensure it fits comfortably within your home’s infrastructure. Measuring at a height of 700mm, width of 400mm, and depth of 200mm, it’s designed to be both unobtrusive and efficient in its twin big blue configuration.
These dimensions allow it to accommodate a high volume of water, making it suitable for larger households or those with high water usage needs.
When you choose the Twin 20 Big Blue system, you’re investing in a comprehensive package designed to meet all your water filtration needs. The system includes a sturdy housing unit, a mounting bracket, two pressure gauges, and brass ports, all of which contribute to its durability and ease of installation. These components are specifically selected to ensure the system’s longevity and reliability under continuous use.
The core of the Twin 20 Big Blue system lies in its filters. It comes equipped with a 5 Micron Sediment Filter and a 10 Micron Carbon Filter, which work in unison to remove impurities from your water. This two-stage filtration process ensures that sediments, chlorine, and other contaminants are effectively eliminated, providing you with clean, safe drinking water.
The Twin 20 Big Blue system is packed with features that make it a top choice for whole-house water filtration. One of its standout capabilities is its ability to filter up to 50 liters of water per minute, making it suitable for various types of water sources. This high flow rate, combined with its robust filtration process, ensures that your household water is not only clean but also safe for all uses, from drinking to bathing.
Moreover, the system’s design includes features that enhance the quality and taste of your water significantly. By removing harmful contaminants such as bacteria, heavy metals, and chlorine, the Twin 20 Big Blue system ensures that every drop of water is as pure as possible. This comprehensive filtration not only protects your health but also preserves the longevity of your household appliances and plumbing by preventing sediment build-up.
The Twin 20 Big Blue system employs a two-stage filtration process to ensure optimal water purity. The first stage involves a polyspun sediment pre-filter, designed without a central core to maximize filtration capacity and flow. This pre-filter effectively removes larger particles and sediments from the water, protecting the subsequent stages of filtration and ensuring a longer lifespan for the entire system.
In the second stage, a high-grade carbon block filter cartridge takes over, removing chemicals, chlorine, taste, odour, pesticides, heavy metals, and cysts. This combination of a sediment filter and a carbon filter ensures that a wide range of contaminants are eliminated, resulting in cleaner, better-tasting water that enhances the taste colour odour of the water.
Customers have frequently reported a noticeable improvement in the quality and taste of their water post-installation.
The quality of materials used in the Twin 20 Big Blue system is paramount to its performance and safety. The plastics used are guaranteed to be 100% BPA free, ensuring that no harmful chemicals leach into your water. Additionally, the system is UV stabilized, which enhances its durability and reliability under various environmental conditions.
This combination of BPA-free materials and UV stabilization guarantees a safe and long-lasting water filtration solution.
One of the critical features of the Twin 20 Big Blue system is its high burst pressure capacity. Designed to withstand pressures up to 90 PSI, this system can handle demanding conditions without the risk of failure. This high burst pressure not only ensures the system’s durability but also minimizes the risk of leaks, providing peace of mind and consistent performance.
Compliance with local plumbing standards is a vital aspect of any whole-house water filtration system. The Twin 20 Big Blue system is designed to meet and exceed these standards, ensuring both safety and performance. It’s essential to have a licensed plumber handle the installation to comply with these regulations and guarantee optimal system operation.
Hiring certified experts for installation not only ensures compliance but also maximizes the system’s efficiency and longevity. Certified professionals ensure your system is set up correctly, adhering to all necessary codes and standards.
The Twin 20 Big Blue system proudly holds the Australian Water Mark Standard certification, a testament to its quality and reliability. This certification indicates that the product has been thoroughly tested and verified for its intended purpose, ensuring that it meets all safety and performance criteria. Consumers can trust that the system is capable of handling Australian mains water pressure and providing safe, clean water for domestic use.
Achieving the Australian Water Mark Standard means that the Twin 20 Big Blue system is not only compliant with local regulations but also recognized for its superior performance and safety. This certification provides peace of mind to homeowners, knowing that their water filtration system is among the best tested and certified products available.
Independent test reports play a crucial role in verifying the effectiveness of water filtration systems. The Twin 20 Big Blue system has undergone rigorous testing by certified laboratories, confirming its ability to remove various contaminants from tap water.
These reports provide an unbiased assessment of the system’s performance, ensuring that it meets the highest standards of water purification.
Proper installation and maintenance are crucial for the long-term success of any water filtration system. The Twin 20 Big Blue system should be installed by a licensed professional to ensure compliance with local plumbing codes and optimal performance. JR Gas & Water, a trusted supplier and installer, offers expert installation services to guarantee that your system is set up correctly.
Regular maintenance keeps the system functioning at its best. This includes timely filter replacements and routine checks to prevent any issues that could compromise water quality. By following recommended maintenance schedules, homeowners can ensure that their water remains clean and safe year-round.
Hiring a licensed plumber for the installation of the Twin 20 Big Blue system is essential. Australian plumbing codes require water mark approval before installation, and only a licensed plumber can ensure that all regulations are met.
Professional installation ensures the system is set up correctly, providing optimal performance and safety.
Maintaining the Twin 20 Big Blue system involves regular filter replacements and periodic system checks. Sediment filters typically need to be replaced every 3 to 12 months, while carbon filters should be replaced every 6 to 12 months to ensure optimal performance.
Consistent maintenance prevents issues like reduced water pressure and helps maintain water quality.

Customer reviews and testimonials provide valuable insights into the performance and reliability of the Twin 20 Big Blue system. Many users have expressed high levels of satisfaction with the system’s ability to improve water quality and taste. The consistent positive feedback highlights the system’s effectiveness and durability.
However, some users have reported suffering varying degrees of issues related to installation and maintenance. These concerns are typically resolved with a better understanding of the system’s requirements and professional install guidance.
Overall, the feedback underscores the importance of following proper installation and maintenance procedures to achieve the best results.
Customers frequently praise the Twin 20 Big Blue system for its robust design and long-lasting filter cartridges. Many have reported significant improvements in water taste, color, and odor after installation. The system’s ability to effectively remove chlorine and other contaminants has garnered positive reviews, making it a popular choice for households seeking reliable water filtration.
While the majority of feedback is positive, some users have faced challenges with the installation and maintenance of the Twin 20 Big Blue system. These issues are often related to the complexity of the system and the need for professional installation.
Detailed installation guidelines and professional services can mitigate these issues, ensuring flawless operation once properly set up.
The Twin 20 Big Blue system stands out when compared to other whole-house water filtration systems. Its high flow rate and robust filtration capabilities make it more efficient and effective than many standard systems. Additionally, its ability to handle larger volumes of water makes it suitable for households with high water usage.
In terms of cost, the Twin 20 Big Blue system represents a significant investment, but its long-term benefits outweigh the initial expense. Compared to cheaper alternatives, it offers superior filtration and durability, leading to long-term savings on bottled water and reduced health risks.
Twin filtration systems, like the Twin 20 Big Blue, provide increased capacity and longer filter life compared to single filter systems. They offer enhanced filtration efficiency by managing higher flow rates and tackling different contaminants simultaneously.
This makes them ideal for family households looking for comprehensive water purification.
While the Twin 20 Big Blue system may have a higher upfront cost, its comprehensive filtration capabilities and long-term savings on bottled water and health-related expenses make it a cost-effective choice. Customers have reported significant improvements in water taste and clarity, emphasizing the system’s value and reliability.
The Twin 20 Big Blue Whole Home Water Filter System is available through various retailers, making it accessible for purchase through multiple channels. Specialized water filter retailers, such as JR Gas & Water, offer this system along with expert installation services. These retailers ensure that you receive a high-quality product and professional support for installation.
Given its comprehensive filtration technology, the Twin 20 Big Blue system is priced over $895, reflecting its quality and effectiveness. This price point is justified by the system’s robust performance and the long-term benefits it provides to homeowners.
JR Gas & Water is a trusted supplier and installer for the Twin 20 Big Blue filtration system in Australia. They offer not only the product but also professional installation services to ensure that your system is set up correctly and operates optimally. If you need assistance, you can free call span 1800 217.
This combination of quality products and expert great service makes JR Gas & Water a preferred choice for homeowners looking to improve their water quality.
The retail price for the Twin 20 Big Blue Whole Home Water Filter System typically exceeds $895, reflecting its high filtration capabilities and overall value. Despite the higher upfront cost, the long-term benefits of clean, safe water make this system a worthwhile investment for any household.
The Twin 20 Big Blue Whole Home Water Filter System is an exceptional choice for households seeking reliable and comprehensive water filtration. With its robust design, high burst pressure, and superior filtration capabilities, it ensures that every drop of water in your home is clean and safe. Certified by the Australian Water Mark Standard and verified by independent test reports, this system offers peace of mind and long-term benefits. Investing in this system means investing in your family’s health and the longevity of your plumbing and appliances. Choose the Twin 20 Big Blue system for unmatched water quality and reliability.
The recommended retail price for the product is over $895.
The filter system includes a sediment filter and a basic carbon filter designed to remove impurities such as taste, color, odor, and chlorine. This combination ensures cleaner and more palatable water.
The dimensions of the system are Height: 700mm, Width: 400mm, and Depth: 200mm.
The plastics used in the system meet high quality standards, specifically being guaranteed to be 100% BPA free. This ensures safety and compliance for consumer use.
The highest bursting pressure of the system is 90 PSI.
Brisbane's Latest Water Quality Results: What They Mean for Your Home & Health
Brisbane’s tap water is known for being clean and safe, but periodic water testing helps us understand the quality and potential impacts on health, home appliances, and plumbing systems. Here’s a breakdown of the latest test results and what they mean for you.
The latest water testing results for Brisbane’s mains water supply and rainwater tanks show that most parameters are within safe drinking levels. Below are the key findings, including the average and highest recorded levels:
| Parameter | Average Reading | Highest Recorded | Safe Range | Ideal Range | Recommended? | 
|---|---|---|---|---|---|
| pH | 7.77 | 7.90 | 5.5 - 8.5 | 7.0 - 7.5 (Neutral) | ✅ | 
| Turbidity (Cloudiness) | 0.02 NTU | 0.02 NTU | 0 - 5 NTU | < 0.5 NTU (Clear water) | ✅ | 
| Total Dissolved Solids (TDS) | 202.26 mg/L | 305 mg/L | 0 - 600 mg/L | 50 - 150 mg/L (Better taste & less scaling) | ✅ (Lower is better) | 
| Total Hardness | 89.33 mg/L | 143 mg/L | 0 - 200 mg/L | 60 - 120 mg/L (Balanced minerals) | ✅ | 
| Iron (Fe) | 0.03 mg/L | 0.03 mg/L | 0 - 0.3 mg/L | < 0.1 mg/L (No metallic taste or staining) | ❌ (Can cause rust stains) | 
| Manganese (Mn) | 0.012 mg/L | 0.018 mg/L | 0 - 0.5 mg/L | < 0.05 mg/L (Prevents staining & neurological effects) | ❌ | 
| Sodium (Na) | 25 mg/L | 38 mg/L | 0 - 180 mg/L | < 50 mg/L (Better taste & kidney-friendly) | ✅ | 
| Chloride (Cl⁻) | 38 mg/L | 61 mg/L | 0 - 250 mg/L | < 50 mg/L (Avoids salty taste) | ❌ (Not needed in excess) | 
| Sulphate (SO₄²⁻) | 24 mg/L | 42 mg/L | 0 - 250 mg/L | < 50 mg/L (Reduces laxative effects) | ❌ (Not necessary) | 
| Alkalinity | 69 mg/L | 95 mg/L | No standard | 60 - 80 mg/L (Balanced acidity) | ✅ | 
| Nitrate (NO₃⁻) | 0.48 mg/L | 0.9 mg/L | 0 - 11.3 mg/L | < 1 mg/L (Better for health) | ❌ (Linked to health risks in high amounts) | 
| Copper (Cu) | 0.41 mg/L | 0.73 mg/L | 0 - 2 mg/L | < 0.5 mg/L (Prevents metallic taste) | ❌ (From pipes, not needed) | 
| Silica (SiO₂) | 4.07 mg/L | 4.3 mg/L | 0 - 80 mg/L | < 10 mg/L (Avoids deposits on fixtures) | ✅ | 
| Fluoride (F⁻) | 0.54 mg/L | 0.74 mg/L | 0 - 1.5 mg/L | 0 mg/L (Linked to lower IQ & thyroid risks) | ❌ (Unnecessary & controversial) | 
| Conductivity | 316 uS/cm | 477 uS/cm | Optimal | < 400 uS/cm (Best for mineral balance) | ✅ | 
| Parameter | Why It’s Unnecessary or Harmful | Ideal Target | 
|---|---|---|
| Fluoride (F⁻) | Added for dental health, but prolonged fluoride exposure has been linked to lower IQ in areas with high fluoridation, as suggested by multiple studies (e.g., 2019 U.S. and Canadian research). Excessive fluoride may also contribute to thyroid dysfunction and bone weakening. | 0 mg/L | 
| Chloride (Cl⁻) | Often present due to chlorine disinfection or natural sources. High levels can cause a salty taste and corrosion in plumbing. | < 50 mg/L | 
| Copper (Cu) | Comes from corroding pipes rather than natural water sources. High levels cause a metallic taste and potential health effects. | < 0.5 mg/L | 
| Manganese (Mn) | Naturally occurring but contributes to staining, metallic taste, and potential neurological effects at high levels. | < 0.05 mg/L | 
| Iron (Fe) | Can come from plumbing or groundwater. Causes staining, bad taste, and appliance buildup. | < 0.1 mg/L | 
| Nitrate (NO₃⁻) | Usually from agricultural runoff. Long-term exposure is linked to potential health risks, including "blue baby syndrome" in infants. | < 1 mg/L | 
| Sulphate (SO₄²⁻) | Naturally occurring but excessive amounts can have a laxative effect and cause water to taste bitter. | < 50 mg/L | 
| Total Dissolved Solids (TDS) | Measures the overall mineral content. Too high can cause taste issues and appliance scaling. | 50 - 150 mg/L | 
| Turbidity (Cloudiness) | Should be as close to 0 as possible for clean, pure water. | < 0.5 NTU | 
| Silica (SiO₂) | Naturally occurring, but excessive levels can lead to scale buildup on appliances. | < 10 mg/L | 
| Parameter | Why It’s Okay | Ideal Range | 
|---|---|---|
| pH | Best when neutral for taste and plumbing safety. | 7.0 - 7.5 | 
| Alkalinity | Helps stabilize pH and prevent pipe corrosion. | 60 - 80 mg/L | 
| Hardness (Calcium & Magnesium) | Essential minerals for health, but excessive hardness causes scaling. | 60 - 120 mg/L | 
| Sodium (Na) | Naturally occurring but should be kept low for health and taste. | < 50 mg/L | 
🔹 Remove fluoride completely to avoid potential cognitive effects and thyroid risks.
🔹 Reduce chlorine and chloride for better taste and less corrosion.
🔹 Minimize heavy metals like copper, iron, and manganese for purity.
🔹 Lower TDS slightly to improve taste and appliance longevity.
Would you like filtration recommendations to achieve these water quality improvements? 🚰
| Parameter | Recorded Reading | Safe Range | Ideal Range | Recommended? | 
|---|---|---|---|---|
| pH | 6.34 | 5.5 - 8.5 | 6.5 - 7.5 (Neutral for best taste & safety) | ❌ (Slightly acidic) | 
| Turbidity (Cloudiness) | 0.02 NTU | 0 - 5 NTU | < 0.5 NTU (Clear water) | ✅ | 
| Total Dissolved Solids (TDS) | 11.63 mg/L | 0 - 600 mg/L | 10 - 50 mg/L (Balanced minerals, no scaling) | ✅ | 
| Total Hardness | 8 mg/L | 0 - 200 mg/L | < 50 mg/L (Soft water, prevents scaling) | ✅ | 
| Iron (Fe) | 0.03 mg/L | 0 - 0.3 mg/L | < 0.1 mg/L (No staining or metallic taste) | ✅ | 
| Manganese (Mn) | 0.009 mg/L | 0 - 0.5 mg/L | < 0.05 mg/L (Prevents staining & neurological effects) | ✅ | 
| Sodium (Na) | 1 mg/L | 0 - 180 mg/L | < 10 mg/L (Avoids salty taste) | ✅ | 
| Chloride (Cl⁻) | 1 mg/L | 0 - 250 mg/L | < 10 mg/L (Prevents corrosion) | ✅ | 
| Sulphate (SO₄²⁻) | 0 mg/L | 0 - 250 mg/L | < 10 mg/L (Avoids taste & digestive issues) | ✅ | 
| Alkalinity | 13 mg/L | Moderate | 20 - 50 mg/L (Balanced pH stability) | ❌ (A bit low) | 
| Nitrate (NO₃⁻) | 0.72 mg/L | 0 - 11.3 mg/L | < 1 mg/L (Prevents health risks) | ✅ | 
| Copper (Cu) | 2.24 mg/L | 0 - 2 mg/L (Exceeds limit) | < 0.5 mg/L (Prevents metallic taste & toxicity) | ❌ (Too high, likely from pipes) | 
| Silica (SiO₂) | 0.1 mg/L | 0 - 80 mg/L | < 10 mg/L (Avoids deposits on fixtures) | ✅ | 
| Fluoride (F⁻) | 0.59 mg/L | 0 - 1.5 mg/L | 0 mg/L (Not needed; linked to lower IQ & thyroid issues) | ❌ (Should be removed) | 
| Conductivity | 18.17 uS/cm | Optimal | 10 - 100 uS/cm (Indicates low impurities) | ✅ | 
| Contaminant | Why It’s Unnecessary or Harmful? | Ideal Level | 
|---|---|---|
| Fluoride (F⁻) | Not naturally present in rainwater. Studies (Harvard, U.S. EPA) link prolonged fluoride exposure to lower IQ, thyroid dysfunction, and skeletal issues. | 0 mg/L | 
| Copper (Cu) | Exceeds safe limit. Likely from corroding pipes or roofing. High levels can cause metallic taste and health risks. | < 0.5 mg/L | 
| pH (Acidic Water) | Slightly too low. Acidic water can cause pipe corrosion and leach metals like copper into the water. | 6.5 - 7.5 | 
| Alkalinity | Low alkalinity can make water unstable and prone to pH fluctuations. | 20 - 50 mg/L | 
🔹 Total Hardness (8 mg/L in rainwater): Extremely soft water, which can be corrosive to pipes, leading to potential metal leaching from plumbing.
🔹 Iron & Manganese (Rainwater: Iron 0.03 mg/L, Manganese 0.009 mg/L): Low but can cause sediment buildup over time if not filtered.
🔹 Copper (2.24 mg/L in rainwater): High levels may indicate corrosion in metal roofing or pipes, leading to health and plumbing concerns.
For both mains and rainwater users, filtration is essential to ensure clean, safe drinking water. Here’s what we recommend:
✅ For Rainwater Users:
Puretec Hybrid G Series: Great for sediment, bacteria, and chlorine removal (if rainwater is treated).
Puretec Reverse Osmosis (RO) System: Removes copper, fluoride, and dissolved contaminants.
Puretec Filter Wall System: A high-flow system for whole-house filtration.
✅ For Mains Water Users:
Puretec X3 or Z1 Series: Best for drinking water filtration.
Puretec Reverse Osmosis (RO) System: Removes fluoride and heavy metals.
Want to improve your water quality? Check out our Puretec Water Filtration Solutions at JR Gas & Water! 🚰💧