{"product_id":"twin-undersink-bacteria-rain-tank-water-filter-system-gt1-46wmaf","title":"Twin Undersink Water Filter System for Rain \u0026 Tank Water | Bacteria Protection with 0.1 Micron + Silver Carbon (GT1-46WMAF)","description":"\u003ch1\u003eTwin Undersink Water Filter System for Rain \u0026amp; Tank Water (GT1-46WMAF)\u003c\/h1\u003e\n\u003cp data-end=\"1164\" data-start=\"941\"\u003eThis \u003cstrong data-end=\"984\" data-start=\"946\"\u003eTwin Undersink Water Filter System\u003c\/strong\u003e is specifically configured to provide enhanced protection for homes using \u003cstrong data-end=\"1086\" data-start=\"1059\"\u003erainwater or tank water\u003c\/strong\u003e, targeting bacteria, cysts, sediment, and odour from harvested water sources.\u003c\/p\u003e\n\u003cp data-end=\"1649\" data-start=\"1166\"\u003eThe first stage features a \u003cstrong data-end=\"1244\" data-start=\"1193\"\u003e0.1 micron absolute-rated multi-stage cartridge\u003c\/strong\u003e, incorporating pleated prefiltration (10µm and 5µm), a 0.5µm carbon block, and a final \u003cstrong data-end=\"1357\" data-start=\"1332\"\u003ehollow fibre membrane\u003c\/strong\u003e designed for ultrafine bacterial and cyst reduction. Independently tested to \u003cstrong data-end=\"1451\" data-start=\"1435\"\u003eASTM F838-15\u003c\/strong\u003e, this filter achieved \u003cstrong data-end=\"1505\" data-start=\"1474\"\u003eLog8 reduction (99.999999%)\u003c\/strong\u003e of \u003cstrong data-end=\"1520\" data-start=\"1509\"\u003eE. coli\u003c\/strong\u003e and \u003cstrong data-end=\"1551\" data-start=\"1525\"\u003ePseudomonas aeruginosa\u003c\/strong\u003e, while also being compliant to \u003cstrong data-end=\"1614\" data-start=\"1585\"\u003eNSF\/ANSI 42 and 53 (Cyst)\u003c\/strong\u003e, FDA, and EU food-grade standards.\u003c\/p\u003e\n\u003cp data-end=\"1935\" data-start=\"1651\"\u003eThe second stage is a \u003cstrong data-end=\"1725\" data-start=\"1673\"\u003e5 micron silver-impregnated coconut carbon block\u003c\/strong\u003e, manufactured by \u003cstrong data-end=\"1780\" data-start=\"1743\"\u003eHigh Performance Filtration (HPF)\u003c\/strong\u003e. This cartridge improves taste, removes odours and organic residues, and incorporates silver to help discourage microbial growth within the filter itself.\u003c\/p\u003e\n\u003cp data-end=\"2224\" data-start=\"1937\"\u003eDesigned for easy installation under the sink, this system is compact, professionally assembled, and supplied with WaterMark certified components — making it an ideal, safe, and high-performance option for households seeking reassurance when drinking or cooking with harvested rainwater.\u003c\/p\u003e\n\u003chr data-end=\"2229\" data-start=\"2226\"\u003e\n\u003ch4 data-end=\"2304\" data-start=\"2231\"\u003e\u003cstrong data-end=\"2302\" data-start=\"2236\"\u003eFilter 1: 0.1 Micron Multi-Layer Bacteria Protection Cartridge\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp data-end=\"2593\" data-start=\"2305\"\u003eThis advanced filter combines multiple stages in a single compact cartridge: two outer pleated filtration layers (10µm and 5µm), an internal 0.5µm carbon block for chemical and taste reduction, and a final \u003cstrong data-end=\"2542\" data-start=\"2511\"\u003e0.1µm hollow fibre membrane\u003c\/strong\u003e for ultrafine particulate and microbial retention.\u003c\/p\u003e\n\u003cp data-end=\"2936\" data-start=\"2595\"\u003eTested to \u003cstrong data-end=\"2621\" data-start=\"2605\"\u003eASTM F838-15\u003c\/strong\u003e, it achieved \u003cstrong data-end=\"2667\" data-start=\"2635\"\u003e\u0026gt;99.999999% (Log8) reduction\u003c\/strong\u003e of \u003cem data-end=\"2680\" data-start=\"2671\"\u003eE. coli\u003c\/em\u003e and \u003cem data-end=\"2700\" data-start=\"2685\"\u003eP. aeruginosa\u003c\/em\u003e — far exceeding typical filtration performance for household water filters. Its absolute-rated hollow fibre structure allows for dependable protection against bacteria and cysts, without compromising flow under normal kitchen pressure.\u003c\/p\u003e\n\u003chr data-end=\"2941\" data-start=\"2938\"\u003e\n\u003ch4 data-end=\"3018\" data-start=\"2943\"\u003e\u003cstrong data-end=\"3016\" data-start=\"2948\"\u003eFilter 2: 5 Micron Silver-Impregnated Coconut Carbon Block (HPF)\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp data-end=\"3373\" data-start=\"3019\"\u003eThe second stage is a high-capacity carbon block made from \u003cstrong data-end=\"3107\" data-start=\"3078\"\u003e100% coconut shell carbon\u003c\/strong\u003e, enhanced with silver to support internal cleanliness and help reduce odour-causing microbial activity. It effectively adsorbs residual organic compounds and improves taste — ideal for water that has been stored in tanks or passed through organic roofing materials.\u003c\/p\u003e\n\u003cp data-end=\"3503\" data-start=\"3375\"\u003eThis cartridge provides the final polishing stage in a rainwater system, supporting cleaner and more palatable water at the tap.\u003c\/p\u003e\n\u003chr data-end=\"3508\" data-start=\"3505\"\u003e\n\u003ch4 data-end=\"3593\" data-start=\"3510\"\u003e\u003cspan style=\"color: rgb(52, 73, 94);\"\u003e\u003cstrong data-end=\"3591\" data-start=\"3515\"\u003eWhat is Silver-Impregnated (Bacteriostatic) Carbon and How Does It Work?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp data-end=\"3941\" data-start=\"3594\"\u003eSilver-impregnated carbon, often referred to as \"bacteriostatic\", is a specially treated form of activated carbon designed to help \u003cstrong data-end=\"3760\" data-start=\"3725\"\u003esuppress the growth of bacteria\u003c\/strong\u003e within the filter cartridge itself. While it does not kill bacteria, the presence of silver helps to maintain a cleaner internal environment by discouraging microbial colonisation.\u003c\/p\u003e\n\u003cp data-end=\"4102\" data-start=\"3943\"\u003eThis is particularly useful in low-chlorine or chlorine-free systems such as \u003cstrong data-end=\"4034\" data-start=\"4020\"\u003etank water\u003c\/strong\u003e, where untreated filters can be prone to biofilm buildup over time.\u003c\/p\u003e\n\u003chr data-end=\"4107\" data-start=\"4104\"\u003e\n\u003ch4 data-end=\"4175\" data-start=\"4109\"\u003e\u003cspan style=\"color: rgb(132, 63, 161);\"\u003e\u003cstrong data-end=\"4173\" data-start=\"4114\"\u003eWhy Choose This System Instead of UV for Undersink Use?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp data-end=\"660\" data-start=\"303\"\u003eWhile \u003cstrong data-end=\"328\" data-start=\"309\"\u003eUV disinfection\u003c\/strong\u003e is highly effective and remains the best whole-house solution for microbiological safety, it’s not always ideal for undersink installations. UV systems require power, consistent flow, and regular maintenance, and when installed at a single tap with \u003cstrong data-end=\"591\" data-start=\"578\"\u003elow usage\u003c\/strong\u003e, they can cause issues with \u003cstrong data-end=\"659\" data-start=\"620\"\u003eheat build-up inside the UV chamber\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-end=\"875\" data-start=\"662\"\u003eIn small UV systems, stagnant water in the chamber can become \u003cstrong data-end=\"758\" data-start=\"724\"\u003euncomfortably warm or even hot\u003c\/strong\u003e, particularly after periods of no flow — which is not ideal for drinking water and may impact taste or user comfort.\u003c\/p\u003e\n\u003cp data-end=\"1249\" data-start=\"877\"\u003eThis twin filter system offers a \u003cstrong data-end=\"945\" data-start=\"910\"\u003epassive, power-free alternative\u003c\/strong\u003e that physically blocks bacteria and cysts at the point of use using \u003cstrong data-end=\"1050\" data-start=\"1014\"\u003ehollow fibre membrane technology\u003c\/strong\u003e, without the risk of heating or complexity. It's an ideal option for off-grid homes, weekenders, or any household using \u003cstrong data-end=\"1208\" data-start=\"1171\"\u003erainwater or untreated tank water\u003c\/strong\u003e who want targeted protection at the tap.\u003c\/p\u003e\n\u003cblockquote data-end=\"5197\" data-start=\"4811\"\u003e\n\u003cp data-end=\"5197\" data-start=\"4813\"\u003e⚠️ \u003cstrong data-end=\"4831\" data-start=\"4816\"\u003eDisclaimer:\u003c\/strong\u003e Do not use this system to filter microbiologically unsafe water or water of unknown quality without adequate disinfection. We recommend \u003cstrong data-end=\"5047\" data-start=\"4968\"\u003edosing your tank with a product such as Hydrosil Ultra 7.5% Water Sanitiser\u003c\/strong\u003e to ensure full protection against microbiological contamination in your pipework and filter system, and to help prevent biofouling within the filter.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003chr data-end=\"5202\" data-start=\"5199\"\u003e\n\u003ch4 data-end=\"5225\" data-start=\"5204\"\u003e\u003cspan style=\"color: rgb(53, 152, 219);\"\u003e\u003cstrong data-end=\"5225\" data-start=\"5209\"\u003eKit Contains\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h4\u003e\n\u003cul data-end=\"5790\" data-start=\"5227\"\u003e\n\u003cli data-end=\"5281\" data-start=\"5227\"\u003e\n\u003cp data-end=\"5281\" data-start=\"5229\"\u003e2 × 10\" x 2.5\" WaterMark Certified Filter Housings (GT8-14)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"5362\" data-start=\"5282\"\u003e\n\u003cp data-end=\"5362\" data-start=\"5284\"\u003e1 × 0.1 Micron Multi-Layer Absolute Bacteria Filter (GT42-0-MAF)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"5425\" data-start=\"5363\"\u003e\n\u003cp data-end=\"5425\" data-start=\"5365\"\u003e1 × 5 Micron Silver-Impregnated Coconut Carbon Block GT4-58BCC05\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"5476\" data-start=\"5426\"\u003e\n\u003cp data-end=\"5476\" data-start=\"5428\"\u003e1 × White Powder-Coated Steel Mounting Bracket\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"5509\" data-start=\"5477\"\u003e\n\u003cp data-end=\"5509\" data-start=\"5479\"\u003e1 × Modern Chrome Faucet Tap\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"5570\" data-start=\"5510\"\u003e\n\u003cp data-end=\"5570\" data-start=\"5512\"\u003e1 × WaterMark Approved Pressure Limiting Valve (350 kPa)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"5598\" data-start=\"5571\"\u003e\n\u003cp data-end=\"5598\" data-start=\"5573\"\u003e1 × Leak Shut-Off Valve\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"5638\" data-start=\"5599\"\u003e\n\u003cp data-end=\"5638\" data-start=\"5601\"\u003e1 × Feed Water Valve\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"5688\" data-start=\"5639\"\u003e\n\u003cp data-end=\"5688\" data-start=\"5641\"\u003eTubing, Push-Fit Connectors \u0026amp; Housing Spanner\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"5732\" data-start=\"5689\"\u003e\n\u003cp data-end=\"5732\" data-start=\"5691\"\u003eComprehensive Installation Instructions\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"5790\" data-start=\"5733\"\u003e\n\u003cp data-end=\"5790\" data-start=\"5735\"\u003eOptional Tap Upgrade: 3-Way Mixer Tap (charges apply)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"5795\" data-start=\"5792\"\u003e\n\u003ch3 data-end=\"5830\" data-start=\"5797\"\u003e\u003cspan style=\"color: rgb(224, 62, 45);\"\u003e\u003cstrong data-end=\"5828\" data-start=\"5801\"\u003eWaterMark Certification\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp data-end=\"6008\" data-start=\"5831\"\u003eThis system is \u003cstrong data-end=\"5916\" data-start=\"5846\"\u003eWaterMark Certified to AS 3497:2021 under Certificate Number 23247\u003c\/strong\u003e — the mandatory certification required for installation by a licensed plumber in Australia.\u003c\/p\u003e\n\u003cp data-end=\"6290\" data-start=\"6010\"\u003eWaterMark certification guarantees the system meets Australian plumbing and safety standards. All components are \u003cstrong data-end=\"6151\" data-start=\"6123\"\u003ecompliant to NSF\/ANSI 42\u003c\/strong\u003e, with the bacteria-rated cartridge also meeting \u003cstrong data-end=\"6222\" data-start=\"6200\"\u003eNSF\/ANSI 53 (Cyst)\u003c\/strong\u003e requirements and tested to international microbiological standards.\u003c\/p\u003e\n\u003cp data-end=\"6441\" data-start=\"6292\"\u003e\u003cstrong data-end=\"6314\" data-start=\"6292\"\u003eInstallation Note:\u003c\/strong\u003e\u003cbr data-end=\"6317\" data-start=\"6314\"\u003eInstallation must be completed by a licensed plumber. Full instructions are included for a straightforward, compliant setup.\u003c\/p\u003e","brand":"Filter Systems Australia","offers":[{"title":"Default Title","offer_id":50161734353153,"sku":"GT1-46WMAF","price":465.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0834\/9764\/8385\/files\/gt1-46wmaf_-_2025.jpg?v=1786080421","url":"https:\/\/www.purewaterfiltersrus.com.au\/products\/twin-undersink-bacteria-rain-tank-water-filter-system-gt1-46wmaf","provider":"Pure Water Filters R Us","version":"1.0","type":"link"}