FIL-GPS-103
$995.00 NZD
All prices include GST
Big 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.
Protect 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 (E. coli ATCC 25922) from 1.1×106 CFU/100 mL to <1 CFU/100 mL at 50 L/min — a removal rate of >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.
This 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.
| Specification | |
|---|---|
| System | Twin Big Blue filter housings + LED UV water purifier (AGLED-12G) |
| Variants | 10" × 4.5" housings (FIL-GPS-103) or 20" × 4.5" housings (FIL-GPS-203), with optional cartridges |
| UV Type | LED UV, flow-activated (instant on/off) |
| Rated Power | 16 W (only while water is flowing) |
| Recommended Max Flow Rate | 45 L/min (12 GPM) recommended; SGS challenge tested at 50 L/min |
| Min Flow Rate | 4 L/min (1 GPM) flow trigger |
| Inlet / Outlet | 1" Female (G1") |
| Max Inlet Pressure | 0.8 MPa (8 bar / 116 psi) |
| Power Supply | 240 V NZ plug-in power supply to 24 V DC (900 mm cable) |
| LED Lifespan | Approx. 5,000 hours (~10 years at 1–1.5 hrs flow/day) |
| Water Temperature | 0–45 °C |
| Disinfection Performance | SGS challenge test (GB/T 5750.12-2023): total coliforms (E. coli ATCC 25922) >99.999% removal at 50 L/min (influent 1.1×106 CFU/100 mL → effluent <1 CFU/100 mL). Report NBF25-0021833-01, 20 Oct 2025. No mJ/cm² lamp-dose figure is quoted for this LED unit. |
| Product Dimensions | 10" (FIL-GPS-103): approx 39 × 20 × 44 cm (W × D × H) 20" (FIL-GPS-203): approx 39 × 20 × 70 cm (W × D × H) |
| Package Dimensions | 10": 41 × 22 × 46 cm 20": 41 × 22 × 72 cm |
| Mounting | Painted 304 stainless steel wall bracket to minimise rusting, with BWT logo; stainless flex link hose included |
| Filter Cartridges | Ships empty by default. Optional at checkout: Pleated & 1 Micron, or 1 Micron & CTO (same options as our Jumbo housings) |
| Warranty | 1 year |
| Best For | Tiny homes, off-grid / solar, lifestyle blocks, rainwater and bore supplies where low power and long service life matter |
| Details | |
|---|---|
| Delivery | Courier nationwide. Timing confirmed at checkout / with sales. |
| Shipping Cost | Calculated at checkout based on your location. |
| Collections | Available from 21 Akatea Road, Glendene, Auckland (and by arrangement from Taupo). |
| Installation | Must 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. |
| What's Included | Twin 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). |
| Warranty | 1 year on the unit. |
The 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.
Designed 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.
For standard roof-collected rainwater we recommend the same approach as our tiny home guide:
If you top up from chlorinated town supply or have taste/odour issues, choose the 1 Micron & CTO option. High-silt bores may need a 5 micron polyspun cartridge instead — ask us if unsure.
Download our installation manual above for plumbing, setup and maintenance details.
Traditional 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.
SGS-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 E. coli ATCC 25922 under GB/T 5750.12-2023. At 50 L/min, influent was 1.1×106 CFU/100 mL and effluent was <1 CFU/100 mL — a removal rate of >99.999%. The report does not quote an mJ/cm² dose figure.
The 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).
By default the unit ships empty (housings + LED UV only). At checkout you can add Pleated & 1 Micron cartridges for standard rainwater, or 1 Micron & CTO if you want carbon for taste/odour. You can also buy cartridges separately later — UV still needs clear water upstream to work well.
Both 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.
Yes — 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 tiny home water guide for the full layout.
Yes — 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.