{"product_id":"led-uv-treatment-filter","title":"LED UV Treatment Filter — Twin Housing + Flow-Activated LED UV","description":"\u003cp style=\"text-align: center;\"\u003eBig Water Tanks supplies complete rainwater filtration and sterilisation systems for Kiwi homes, lifestyle blocks and tiny homes. This LED UV treatment filter combines twin-stage cartridge housings with a flow-activated LED UV purifier — sterilising your water only when the tap is running, so it saves power and lasts for years.\u003c\/p\u003e\n\u003cp\u003e\u003c!-- split --\u003e\u003c\/p\u003e\n\u003cdiv class=\"product-description\"\u003e\n\u003ch2\u003eLED UV Treatment Filter: Twin Filtration + Flow-Activated Sterilisation\u003c\/h2\u003e\n\u003cp\u003eProtect your rainwater, bore or well supply with our new Premium Black LED UV treatment filter — a wall-mounted twin filter housing paired with a stainless steel LED UV water purifier (AGLED-12G). Water first passes through two Big Blue cartridge housings, then through the LED UV chamber. An independent SGS laboratory challenge test on the AGLED-12G reduced total coliforms (\u003cem\u003eE. coli\u003c\/em\u003e ATCC 25922) from 1.1×10\u003csup\u003e6\u003c\/sup\u003e CFU\/100 mL to \u0026lt;1 CFU\/100 mL at 50 L\/min — a removal rate of \u0026gt;99.999%. Unlike traditional mercury UV lamps that must stay on 24\/7, this LED unit turns on only when water is flowing, reaches full intensity instantly, uses just 16 W while running, and is rated for around 5,000 hours of service life — about 10 years at typical household flow of 1–1.5 hours a day. Ideal for tiny homes, off-grid solar setups, lifestyle blocks and any rainwater system where power and bulb life matter. Ships as the empty twin-housing + LED UV unit; add cartridges at checkout if you want them fitted.\u003c\/p\u003e\n\u003cdiv class=\"col-section\"\u003e\n\u003cdiv class=\"col\"\u003e\n\u003cdiv class=\"btile\"\u003e\n\u003ch3 class=\"btile-header\"\u003e\n\u003ci class=\"bicon bicon-list\"\u003e\u003c\/i\u003eKey Features \u0026amp; Benefits\u003c\/h3\u003e\n\u003cdiv class=\"btile-content\"\u003e\n\u003cp\u003eThis is a complete twin-stage filter housing plus LED UV package on a painted 304 stainless steel wall bracket to minimise rusting — ready to plumb after your pump. Choose 10\" or 20\" housings, and whether to add starter cartridges.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlow-Activated LED UV:\u003c\/strong\u003e Turns on only when water is flowing — no warm-up, full intensity instantly, and no power wasted while you sleep\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSerious Power Saving:\u003c\/strong\u003e Draws just 16 W while running. A typical mercury UV lamp can sit at around 55 W continuously (~1,320 Wh per day); this LED unit only uses power when the tap is on\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e~10-Year LED Life:\u003c\/strong\u003e Around 5,000 hours of service life. At about 1–1.5 hours of flow a day, that equates to roughly 10 years before a LED module change\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo Mercury:\u003c\/strong\u003e LED UV — no fragile mercury lamps to handle or dispose of\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwin Filtration + UV:\u003c\/strong\u003e Two premium black Big Blue housings in series, then a stainless steel LED UV purifier — sediment first, sterilisation last\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSGS-Tested Disinfection:\u003c\/strong\u003e \u0026gt;99.999% removal of total coliforms (\u003cem\u003eE. coli\u003c\/em\u003e ATCC 25922) at 50 L\/min (SGS report NBF25-0021833-01)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWall-Mount Ready:\u003c\/strong\u003e Painted 304 stainless steel wall bracket to minimise rusting, with BWT branding, stainless flex hose between filters and UV, and a standard NZ plug\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo Hot Water from Treatment:\u003c\/strong\u003e Because the LED only runs while water is flowing, it doesn't heat water sitting in the chamber — unlike older mercury UV systems that run 24\/7 and warm the standing water\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1-Year Warranty:\u003c\/strong\u003e Covered by our 1-year manufacturer's warranty on the unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"btile\"\u003e\n\u003ch3 class=\"btile-header\"\u003e\n\u003ci class=\"bicon bicon-table\"\u003e\u003c\/i\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv class=\"btile-content\"\u003e\n\u003ctable class=\"product-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"min-width: 150px;\"\u003e\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSystem\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTwin Big Blue filter housings + LED UV water purifier (AGLED-12G)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVariants\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10\" × 4.5\" housings (FIL-GPS-103) or 20\" × 4.5\" housings (FIL-GPS-203), with optional cartridges\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eUV Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLED UV, flow-activated (instant on\/off)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRated Power\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e16 W (only while water is flowing)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRecommended Max Flow Rate\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e45 L\/min (12 GPM) recommended; SGS challenge tested at 50 L\/min\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMin Flow Rate\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4 L\/min (1 GPM) flow trigger\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInlet \/ Outlet\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1\" Female (G1\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Inlet Pressure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.8 MPa (8 bar \/ 116 psi)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Supply\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e240 V NZ plug-in power supply to 24 V DC (900 mm cable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLED Lifespan\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApprox. 5,000 hours (~10 years at 1–1.5 hrs flow\/day)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWater Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0–45 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDisinfection Performance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSGS challenge test (GB\/T 5750.12-2023): total coliforms (\u003cem\u003eE. coli\u003c\/em\u003e ATCC 25922) \u0026gt;99.999% removal at 50 L\/min (influent 1.1×10\u003csup\u003e6\u003c\/sup\u003e CFU\/100 mL → effluent \u0026lt;1 CFU\/100 mL). Report NBF25-0021833-01, 20 Oct 2025. No mJ\/cm² lamp-dose figure is quoted for this LED unit.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Dimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10\" (FIL-GPS-103): approx 39 × 20 × 44 cm (W × D × H)\u003cbr\u003e20\" (FIL-GPS-203): approx 39 × 20 × 70 cm (W × D × H)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10\": 41 × 22 × 46 cm\u003cbr\u003e20\": 41 × 22 × 72 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMounting\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePainted 304 stainless steel wall bracket to minimise rusting, with BWT logo; stainless flex link hose included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFilter Cartridges\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eShips empty by default. Optional at checkout: Pleated \u0026amp; 1 Micron, or 1 Micron \u0026amp; CTO (same options as our Jumbo housings)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 year\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBest For\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTiny homes, off-grid \/ solar, lifestyle blocks, rainwater and bore supplies where low power and long service life matter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"full-width-section light\"\u003e\n\u003ch3\u003eWhy Choose LED UV Over Traditional Mercury Lamps\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOnly On When Flowing:\u003c\/strong\u003e Traditional UV lamps usually run 24\/7 to stay warm; LED UV starts at full strength the moment water moves\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLower Power Bill \/ Battery Drain:\u003c\/strong\u003e 16 W while the tap runs, versus tens of watts all day and night on a typical mercury system — a game-changer on solar\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLong Service Intervals:\u003c\/strong\u003e Around 5,000 hours of LED life instead of yearly mercury bulb changes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCleaner \u0026amp; Safer Handling:\u003c\/strong\u003e No mercury lamps to replace or dispose of\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo Warm Standing Water:\u003c\/strong\u003e Mercury lamps left on 24\/7 warm the water sitting in the chamber; LED UV only runs on flow, so you don't get unwanted hot water from treatment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProven by Challenge Testing:\u003c\/strong\u003e Performance is shown by biological kill of coliforms under flow, rather than a mercury-lamp mJ\/cm² calculation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col\"\u003e\n\u003cdiv class=\"btile\"\u003e\n\u003ch3 class=\"btile-header\"\u003e\n\u003ci class=\"bicon bicon-truck\"\u003e\u003c\/i\u003eDelivery or Collection\u003c\/h3\u003e\n\u003cdiv class=\"btile-content\"\u003e\n\u003ctable class=\"product-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"min-width: 150px;\"\u003e\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDelivery\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCourier nationwide. Timing confirmed at checkout \/ with sales.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShipping Cost\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCalculated at checkout based on your location.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCollections\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAvailable from 21 Akatea Road, Glendene, Auckland (and by arrangement from Taupo).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInstallation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMust be installed by a registered plumber. Fit after the pump on the pressurised line; flush housings before fitting cartridges. Please see the service note below about the flow arrow on the UV chamber.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWhat's Included\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTwin black Big Blue housings on a painted 304 stainless steel wall bracket to minimise rusting, stainless LED UV purifier with flex link hose, and a standard NZ plug. Filter cartridges only if you select them at checkout (default is empty \/ None).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 year on the unit.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"full-width-section light\"\u003e\n\u003ch3\u003eService Note: UV Chamber Flow Arrow\u003c\/h3\u003e\n\u003cp\u003eThe flow direction arrow printed on the LED UV chamber is drawn the wrong way round. Water enters the UV chamber at the end with the cable. The unit comes mounted the correct way on its bracket, so please don't turn the UV chamber around to follow the arrow.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"btile\"\u003e\n\u003ch3 class=\"btile-header\"\u003e\n\u003ci class=\"bicon bicon-drop\"\u003e\u003c\/i\u003eIdeal Uses\u003c\/h3\u003e\n\u003cdiv class=\"btile-content\"\u003e\n\u003cp\u003eDesigned as Stage 1–2 sediment filtration plus Stage 3 UV sterilisation on a pressurised line after your pump — the same layout we recommend in our tiny home water guide.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTiny Homes \u0026amp; Off-Grid:\u003c\/strong\u003e Flow-activated 16 W draw protects small inverters and battery banks that cannot afford a UV lamp left on overnight\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRainwater Harvesting:\u003c\/strong\u003e Twin housings strip sediment so UV light can work at full strength; LED UV then disinfects the clarified water\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLifestyle Blocks \u0026amp; Baches:\u003c\/strong\u003e Compact wall-mount unit for the pump shed; choose 10\" for light use or 20\" for higher daily demand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeader-Tank Layouts:\u003c\/strong\u003e Place sediment filters on the way up to the high tank, and UV on the gravity line into the house so you keep hard-earned pressure\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"full-width-section light\"\u003e\n\u003ch3\u003eWhich Size \u0026amp; Filters?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e10\" housings:\u003c\/strong\u003e Tiny homes, baches, 1-bathroom setups and conservative water use\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20\" housings:\u003c\/strong\u003e Larger households, higher daily flow, less frequent cartridge changes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNone (empty):\u003c\/strong\u003e Unit only — fit your own cartridges later\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePleated \u0026amp; 1 Micron:\u003c\/strong\u003e Standard rainwater setup (20-micron pleated + 1-micron polyspun)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 Micron \u0026amp; CTO:\u003c\/strong\u003e Fine sediment plus carbon block for taste\/odour or chlorinated top-up\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"btile\"\u003e\n\u003ch3 class=\"btile-header\"\u003e\n\u003ci class=\"bicon bicon-list\"\u003e\u003c\/i\u003eSuggested Cartridge Setup\u003c\/h3\u003e\n\u003cdiv class=\"btile-content\"\u003e\n\u003cp\u003eFor standard roof-collected rainwater we recommend the same approach as our tiny home guide:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage 1:\u003c\/strong\u003e 20-micron pleated cartridge — catches coarse sediment and debris\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage 2:\u003c\/strong\u003e 1-micron polyspun cartridge — polishes fine particles so UV light is not clouded\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage 3:\u003c\/strong\u003e LED UV purifier (built into this unit) — disinfects after the water is clarified\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIf you top up from chlorinated town supply or have taste\/odour issues, choose the 1 Micron \u0026amp; CTO option. High-silt bores may need a 5 micron polyspun cartridge instead — ask us if unsure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"full-width-section light\"\u003e\n\u003ch2\u003eDownloads\u003c\/h2\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0027\/7050\/1730\/files\/Big-Water-Tanks-LED-UV-Treatment-Filter-Installation-Manual.pdf?v=1794264523\" title=\"LED UV Treatment Filter Installation Manual\" class=\"download-button\" target=\"_blank\"\u003e \u003ci class=\"bicon bicon-pdf\"\u003e\u003c\/i\u003e LED UV Treatment Filter Installation Manual \u003c\/a\u003e\n\u003cp\u003eDownload our installation manual above for plumbing, setup and maintenance details.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"full-width-section light\"\u003e\n\u003ch3\u003eRelated Reading\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTiny Home Water Guide:\u003c\/strong\u003e \u003ca href=\"https:\/\/bigwatertanks.co.nz\/blogs\/news\/ultimate-tiny-house-water-guide\" title=\"Ultimate Tiny House Water Guide\"\u003eStorage, pumping and filtration for North Island tiny homes\u003c\/a\u003e — includes why LED UV beats 24\/7 mercury lamps on solar\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eJumbo filter housings:\u003c\/strong\u003e \u003ca href=\"https:\/\/bigwatertanks.co.nz\/products\/jumbo-water-filter-housings\" title=\"Jumbo Water Filter Housings\"\u003eSame cartridge options as this product\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTraditional mercury UV kits:\u003c\/strong\u003e Still available as our \u003ca href=\"https:\/\/bigwatertanks.co.nz\/products\/uv-system\" title=\"UV Filter Systems\"\u003eUV Filter Systems\u003c\/a\u003e (55 W \/ 110 W) if you prefer a classic always-on steriliser\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"btile\"\u003e\n\u003ch3 class=\"btile-header\"\u003e\n\u003ci class=\"bicon bicon-faq\"\u003e\u003c\/i\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-question\"\u003e\n\u003cspan class=\"question-text\"\u003eHow is LED UV different from a traditional UV lamp?\u003c\/span\u003e\n\u003cdiv class=\"question-metadata\"\u003e\n\u003cspan class=\"accordion-icon\"\u003e\u003c\/span\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-answer\"\u003e\n\u003cdiv class=\"faq-answer-content\"\u003e\n\u003cp\u003eTraditional mercury UV lamps usually stay powered 24\/7 so the bulb stays warm and ready. That can draw around 55 W all day — roughly 1,320 Wh every day — which is hard on solar batteries. Our LED UV turns on only when water is flowing, reaches full intensity instantly (no warm-up), uses 16 W while running, contains no mercury, and is rated for about 5,000 hours of service life. Because it only runs while water flows, it also doesn't heat water sitting in the chamber the way a 24\/7 mercury lamp can. Performance is validated by a biological challenge test (how many coliforms are removed under flow), rather than a mercury-lamp style mJ\/cm² dose calculation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-question\"\u003e\n\u003cspan class=\"question-text\"\u003eWhat does the SGS test show?\u003c\/span\u003e\n\u003cdiv class=\"question-metadata\"\u003e\n\u003cspan class=\"accordion-icon\"\u003e\u003c\/span\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-answer\"\u003e\n\u003cdiv class=\"faq-answer-content\"\u003e\n\u003cp\u003eSGS-CSTC (Ningbo) tested the AGLED-12G LED UV unit (report NBF25-0021833-01, 20 Oct 2025) for total-coliform removal at the start of operating life, using \u003cem\u003eE. coli\u003c\/em\u003e ATCC 25922 under GB\/T 5750.12-2023. At 50 L\/min, influent was 1.1×10\u003csup\u003e6\u003c\/sup\u003e CFU\/100 mL and effluent was \u0026lt;1 CFU\/100 mL — a removal rate of \u0026gt;99.999%. The report does not quote an mJ\/cm² dose figure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-question\"\u003e\n\u003cspan class=\"question-text\"\u003eHow long will the LED last?\u003c\/span\u003e\n\u003cdiv class=\"question-metadata\"\u003e\n\u003cspan class=\"accordion-icon\"\u003e\u003c\/span\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-answer\"\u003e\n\u003cdiv class=\"faq-answer-content\"\u003e\n\u003cp\u003eThe LED module is rated for approximately 5,000 hours. Because it only runs when water is flowing, real calendar life depends on daily use. At about 1–1.5 hours of flow a day, that works out to around 10 years (closer to 9 years at 1.5 hrs\/day, or about 14 years at 1 hr\/day).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-question\"\u003e\n\u003cspan class=\"question-text\"\u003eDo filters come with the unit?\u003c\/span\u003e\n\u003cdiv class=\"question-metadata\"\u003e\n\u003cspan class=\"accordion-icon\"\u003e\u003c\/span\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-answer\"\u003e\n\u003cdiv class=\"faq-answer-content\"\u003e\n\u003cp\u003eBy default the unit ships empty (housings + LED UV only). At checkout you can add Pleated \u0026amp; 1 Micron cartridges for standard rainwater, or 1 Micron \u0026amp; CTO if you want carbon for taste\/odour. You can also buy cartridges separately later — UV still needs clear water upstream to work well.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-question\"\u003e\n\u003cspan class=\"question-text\"\u003eShould I choose the 10\" or 20\" housings?\u003c\/span\u003e\n\u003cdiv class=\"question-metadata\"\u003e\n\u003cspan class=\"accordion-icon\"\u003e\u003c\/span\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-answer\"\u003e\n\u003cdiv class=\"faq-answer-content\"\u003e\n\u003cp\u003eBoth sizes use the same 16 W LED UV. Choose 10\" for tiny homes, baches and lighter use; choose 20\" for larger households or higher daily demand so cartridges last longer and pressure drop stays lower as they load up with sediment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-question\"\u003e\n\u003cspan class=\"question-text\"\u003eIs this suitable for a solar \/ off-grid tiny home?\u003c\/span\u003e\n\u003cdiv class=\"question-metadata\"\u003e\n\u003cspan class=\"accordion-icon\"\u003e\u003c\/span\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-answer\"\u003e\n\u003cdiv class=\"faq-answer-content\"\u003e\n\u003cp\u003eYes — that is exactly where LED UV shines. It only draws 16 W while water is flowing, instead of leaving a mercury lamp on overnight. Pair it with a soft-start pump (such as a DAB Esybox Mini 3 or Esybox Pop) after your tank for a solar-friendly pressurised setup. See our \u003ca href=\"https:\/\/bigwatertanks.co.nz\/blogs\/news\/ultimate-tiny-house-water-guide\"\u003etiny home water guide\u003c\/a\u003e for the full layout.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-question\"\u003e\n\u003cspan class=\"question-text\"\u003eDoes it need a registered plumber, and what is the warranty?\u003c\/span\u003e\n\u003cdiv class=\"question-metadata\"\u003e\n\u003cspan class=\"accordion-icon\"\u003e\u003c\/span\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-answer\"\u003e\n\u003cdiv class=\"faq-answer-content\"\u003e\n\u003cp\u003eYes — install by a registered plumber, after the pump, with water entering the UV chamber at the cable end (the flow arrow printed on the chamber is the wrong way round), and do not exceed 0.8 MPa (8 bar \/ 116 psi). The unit carries a 1-year manufacturer's warranty.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n","brand":"Big Water Tanks","offers":[{"title":"10\" \/ None","offer_id":54705074962616,"sku":"FIL-GPS-103","price":995.0,"currency_code":"NZD","in_stock":true},{"title":"10\" \/ Pleated \u0026 1 Micron","offer_id":54705074995384,"sku":"FIL-GPS-103-PLPP","price":1045.0,"currency_code":"NZD","in_stock":true},{"title":"10\" \/ 1 Micron \u0026 CTO","offer_id":54705075028152,"sku":"FIL-GPS-103-CTO","price":1070.0,"currency_code":"NZD","in_stock":true},{"title":"20\" \/ None","offer_id":54705075060920,"sku":"FIL-GPS-203","price":1195.0,"currency_code":"NZD","in_stock":true},{"title":"20\" \/ Pleated \u0026 1 Micron","offer_id":54705075093688,"sku":"FIL-GPS-203-PLPP","price":1295.0,"currency_code":"NZD","in_stock":true},{"title":"20\" \/ 1 Micron \u0026 CTO","offer_id":54705075126456,"sku":"FIL-GPS-203-CTO","price":1345.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0027\/7050\/1730\/files\/GPS10_white_2048.jpg?v=1794261457","url":"https:\/\/bigwatertanks.co.nz\/products\/led-uv-treatment-filter","provider":"Big Water Tanks","version":"1.0","type":"link"}