Offgrid Water

Offgrid StageOne V3.0 + StageTwo Bundle

£1,450.00 GBP

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Available to order now. Current estimated dispatch: mid to late September.

At a glance

Best for: canal, river, lake and similar off-grid source water
Provides: source filtration plus post-tank polishing for general domestic use
Includes: StageOne V3.0 and StageTwo
Warranty: 2 years

StageOne V3.0 has a more compact frame (5 cm lower and 5 cm shorter), a new brushless pump with additional protection, and more robust components. An auxiliary priming pump is available for installations more than 1.5 metres above the waterline, although it is not necessary for most users.

The StageOne V3.0 + StageTwo bundle is designed to transform water from canals, rivers, lakes or storage tanks into clean, domestic-use water, and then further refine it towards drinking-water quality. This combination is ideal for narrowboats, barges, river boats, cabins, RVs and off-grid homes.

If you require full drinking-water capability, we also offer the StageOne + StageTwo + FinalStage RO bundle separately.

StageOne V3.0 – Primary Filtration with Integrated Pump

The Offgrid StageOne is engineered for demanding off-grid environments. Using a seven-stage filtration process combined with LED UV-C sterilisation, it effectively removes sediments, contaminants, microorganisms and odours from canal, river, lake or rainwater sources.

The unit is plug-and-play and includes an integrated pump, meaning you can begin filtering within minutes of opening the box. The output water is suitable for washing, showering, cleaning and general domestic use, or it can be fed into the StageTwo unit for further purification.

Note: StageOne does not filter salt or brackish water.

StageOne Specification

Source water: Canal, river, lake, rainwater
Power: 160W (12V or 230V adapters supplied)
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
Filter life: approx. 1,500–2,000 litres, depending on source-water quality and use
Running costs: £50–£90 per year (depending on source water)
Included: Hoses, clips, primary strainer, filters and fittings
Warranty: 2 years
Version: V3.0 has a new pump, additional protection and upgraded plumbing over previous versions. Option to attach auxiliary priming pump for use over 1.5 metres above waterline.

StageTwo – Secondary Purification

The StageTwo unit is installed after your onboard pump or accumulator and is designed to refine pre-filtered water even further. It uses ultrafiltration, de-ionisation and carbon filtering to remove remaining contaminants, tastes, odours and microorganisms.

This results in exceptionally clean water that is suitable for cooking, brushing teeth, food preparation. For full drinking-water capability, StageTwo can feed the FinalStage RO unit.

StageTwo Specification

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)
Filter life: 4–8 months
Running costs: £30–£40 per year
Warranty: 2 years

Please note that with the Stage2, your standard water flow will slow slightly depending on the pump that you have available as filters create resistance in water flow. A 25psi pump may not be enough - ideally you should have a 40psi or 3bar pump.