Filters water before and after tank storage for washing, showering and everyday use. Drinking-water treatment can be added separately.
Includes: StageOne V3.1 and StageTwo Water Filter.
Available to pre-order now. Delivery by the end of October.
Available to pre-order now. Delivery by the end of October.
Filter canal, river, lake or rainwater for everyday domestic use. StageOne fills your tank; StageTwo polishes the water after your onboard pump or accumulator.
Cooking water needs drinking-water treatment too. Boiling kills germs but does not remove heavy metals or nitrates. For canal, river and collected rainwater setups, use FinalStage RO after suitable pre-filtration for drinking and cooking.
LED UV-C is designed to inactivate bacteria, viruses and other microorganisms as water passes through.
Installation: An auxiliary priming pump is required if StageOne is installed more than 1 metre above the waterline. Freshwater only.
Warranty: 2 years for the system; 1 year for pumps. If something goes wrong, get in touch. We supply covered replacement parts and help you fit them. Callouts aren't included.
| StageOne V3.1 | Integrated brushless pump, six 10-inch cartridges and LED UV-C. Hoses, clips, primary strainer, filters and fittings included. |
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| StageTwo | Post-tank filtration for use after your onboard pump or accumulator. |
Read the individual StageOne V3.1, StageTwo Water Filter listings for more detail.
StageOne’s seven-stage process treats source water before tank storage. StageTwo then uses ultrafiltration or ceramic and carbon filtration to further reduce remaining contaminants, tastes and odours. Filter configuration depends on your water source.
StageTwo adds post-tank polishing for everyday domestic use. For drinking, cooking, brushing teeth and food preparation from canal, river or collected rainwater, we recommend adding FinalStage RO after suitable pre-filtration.
| Source water | Canal, river, lake, rainwater |
|---|---|
| Frame | Powder-coated stainless steel |
| Power | 160W; both 12V DC and 230V mains power options included |
| Dimensions | W56.5cm × D32cm × H36.5cm |
| Weight | 14kg (dry) / 19kg (wet) |
| Weatherproofing | Rain and cold resistant (protect from frost) |
| Flow rate | 10–12 L/min (depending on setup) |
| Pump | 50psi brushless motor, overheat protection with bypass valve |
| Filters | 6 × 10" × 2.5" cartridges (varies by configuration) |
| LED UV-C | 101.5mJ/cm² |
| Included | Hoses, clips, primary strainer, filters and fittings |
| Warranty | 2 years for the system; 1 year for pumps |
| Version | V3.1 features a powder-coated stainless steel frame, a brushless pump, additional protection and upgraded plumbing over previous versions. Auxiliary priming pump required for installations more than 1 metre above the waterline. |
| Source water | StageOne-purified water, stagnant tank water or mains |
|---|---|
| Power use | None - plumbs into existing system |
| Dimensions | W35cm × D15cm × H35cm |
| Weight | 4kg (dry) / 7kg (wet) |
| Weatherproofing | Indoor or outdoor (avoid direct sunlight) |
| Flow rate | Up to 16 L/min |
| Filters | 3 × 10" × 2.5" cartridges (comes with optional ceramic or ultrafiltration filters depending on flow and filtration requirements) |
| Warranty | 2 years |
StageOne is designed for tank filling. StageTwo is installed after your onboard pump or accumulator; FinalStage RO, where included, is fed from the filtered-water supply.
An auxiliary priming pump is required where StageOne is installed more than 1 metre above the waterline. Keep StageOne protected from frost. It does not filter saltwater or brackish water.
Please note that StageTwo can reduce standard water flow because conventional cartridges create resistance. A 25psi pump may not be enough; we recommend at least 35psi (approximately 2.4 bar). If you use the high-flow Argonide NanoCeram® Filter Cartridge, this flow-restriction issue is eliminated and the 35psi recommendation does not apply.
Includes filter configurations optimised for high-sediment canal and river water and long-term liveaboard use.
Includes filters tailored for varied water sources and greater flexibility for overland or mobile use.
StageOne V3.1 has a compact powder-coated stainless steel frame, 5cm lower and 5cm shorter, with a new brushless pump, additional protection, upgraded plumbing and more robust components.
Allow around £60–£220 a year for consumables across the setup. The amount depends on your source water, use and which filters need replacing. This excludes electricity and paid installation or servicing; heavy use or dirtier water can cost more.
| Filter life | As a rough guide, expect to change one cartridge every 1,500–2,000 litres, depending on your water source and use. You don't need to replace all six at once. Different cartridges last different lengths of time; follow the guidance for each one. |
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| Filter life | 4–8 months |
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The UV-C LED treatment stage is specified to deliver a UV dose of 101.5 mJ/cm² at rated flow and is designed to inactivate bacteria, viruses and other microorganisms as water passes through the system. The UV-C hardware is supported by supplier technical and compliance documentation, with certificates available on request.
Warranty: 2 years for the system; 1 year for pumps.
If something breaks, let us know. We'll help identify the issue, send you a replacement part where needed and get it resolved as quickly as possible.
At Offgrid Water, we want every customer to have a working system. Happy customers are the best recommendation we can hope for.
Inside the system
Hover over a numbered point or select a feature. On a phone, tap to explore.
Hover, tap or use the feature buttons. Where labelled, concealed components are marked on their casing; they are not exposed in this view.
StageOne
StageOne V3.1
StageOne provides the source-water filtration, integrated pump and LED UV-C treatment before tank storage.
For canal, river, lake or rainwater. Protect from frost and use an auxiliary priming pump above 1 metre from the waterline.
StageTwo
StageTwo
Install StageTwo after your onboard pump or accumulator. Its three cartridges polish the stored water.
Your existing tank, onboard pump and accumulator are separate from these supplied components.
Water route
Source → tank → outlets
StageOne fills the tank; StageTwo sits on the pressurised outlet side. Add or use FinalStage RO for a dedicated drinking-water tap.
The source, tank condition, installation and maintenance all affect the final water quality.
