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 and remineralised water for drinking and cooking at a separate tap. StageOne fills your tank; StageTwo polishes the water after your onboard pump or accumulator.
Use the RO tap for drinking and cooking: filling the kettle, cooking pasta or rice, making soup and preparing food.
Boiling is not enough. It kills germs but does not remove heavy metals or nitrates. Reverse osmosis can reduce these and other dissolved contaminants that boiling leaves behind. The reduction achieved depends on the contaminant, membrane, water conditions and maintenance.
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. If something breaks, let us know. We’ll send a replacement part where needed and get it resolved as quickly as possible.
| StageOne V3.1 | Integrated brushless pump, six 10-inch cartridges and LED UV-C. Hoses, clips, primary strainer, filters and fittings included. |
|---|---|
| StageTwo | Post-tank filtration for use after your onboard pump or accumulator. |
| FinalStage RO | Reverse osmosis with remineralisation and a dedicated drinking-water tap. Both 12V DC and mains power options included. |
Read the individual StageOne V3.1, StageTwo and FinalStage RO 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.
FinalStage RO adds reverse osmosis for drinking and cooking. Reverse osmosis can reduce dissolved contaminants, including nitrates, fluoride and metals such as lead; performance depends on the membrane and water conditions. An alkaline post-filter remineralises the water for a clean, fresh taste; a separate remineralisation cartridge is not needed.
| 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 / 15lpm |
| Included | Hoses, clips, primary strainer, filters and fittings |
| Warranty | 2 years |
| 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 | 0W (passive filtration) |
| Dimensions | W35cm × D15cm × H35cm |
| Weight | 4kg (dry) / 7kg (wet) |
| Flow rate | Up to 16 L/min |
| Warranty | 2 years |
| Source water | Water purified by StageOne + StageTwo, stagnant tank water or mains |
|---|---|
| Power | 75W operating / 1.4W standby; both 12V DC and 230V mains power options included |
| Dimensions | W14cm × D45cm × H40cm |
| Weight | 10kg |
| Flow rate | 1.6 L/min |
| 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 UDPAC Argonide NanoCeram filter, this flow-restriction issue is eliminated and the 35psi recommendation does not apply.
Install FinalStage RO indoors. The included drinking-water tap requires a 23mm hole.
Configured specifically for heavy-use boaters (narrowboats, widebeams, river cruisers). Includes filters optimised for high-sediment canal and river water.
Designed for overlanders and mobile users requiring more flexibility in filter choice and water sources. There is the option to get an additional booster pump that helps prime and improve flow (for use if you're parked up several metres from a water source, for instance)
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.
| 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) |
| Filter life | 4–8 months |
|---|---|
| Running costs | £30–£40 per year |
| Filter life | 12–24 months |
|---|---|
| Running costs | £70–£90 per year |
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.
The FinalStage RO uses drinking-water treatment components from manufacturers with products certified to NSF/ANSI 42 and 58. Certification applies to the relevant listed components, not the complete Offgrid Water system.
Warranty: 2 years.
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.
FinalStage RO
FinalStage RO included
The RO unit is fed from the filtered-water supply and provides approximately 1.6 L/min.
Indoor installation. Allow space for plumbing, filter changes and the dedicated tap.
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.
One of the best decisions we’ve made since getting our narrowboat 3 years ago, no more chasing water points only to find them broken/inaccessible. No plumbing experience here but I managed installation start to finish in about 4 hours, all really simple, just about as close to “plug & play” as you can get!
Fellow boater friend has just seen our installation and has immediately bought one! Can’t say better than that…
We met the guys at the Crick Boat Show and we're very impressed by their approach to a solution for off grid water supply. It may not have the 'toys' of some other systems but it does exactly what you need at a much more acceptable cost. We chose the modular version which suited our needs and available space really well. We have been using the system whenever we were away from a shore supply and it has worked exactly as hoped and has taken away any anxiety of running out. Highly recommend.
I couldn't be happier with my water unit. Damien was great from start to finish. He told me about himself, how he got started, all about the system and answered all my questions. I had the unit shipped as I'm not in the London area. A few teething issues but Damien was always available on the phone to talk me through the set up. Now I can easily fill up between trips to the pump out, I don't worry about how long showers are anymore and I have great confidence in the quality of the water having tested it against our bottled water. In the months after my purchase Damien had kept in touch, asked how we have found the unit, provided updates on filters, add ons etc. I would definitely recommend getting in touch and having a chat. The new units are looking great too!
I purchased 'StageOne V2 + StageTwo bundle + RO Combo' in January 2025. 8 months in, it's an absolute game changer. It gives such peace of mind not having to worry about running out of water and being no where near a tap, especially in central London. The water quality is perfect - we barely use the RO unit, stage 1 and stage 2 produces perfectly clean water for drinking. In terms of customer support, Damien has been amazingly incredibly patient with me, a total novice. Plumbing in stage 2 was really awkward, mainly because the only place it could go was at ground level behind a built in cupboard. I had to do install lying down, contorting myself to loosen/tighten various pipes (in image). I made a lot of mistakes, like not using gas PTFE tape/liquid on brass fittings causing leaks. Installing RO unit was more straightforward, partly as lessons were learnt from cock ups made installing stage 2. Despite the stress of installation at times, which wouldn't have been possible without Damien's ongoing support, it's been completely worth it. Running out of water, for me, is the biggest stress factor living on a boat - that's now gone. Would 100% recommend.
Hi I set the off grid water up my self found it pretty straightforward we have the full set up We have been running it now for about 3 months with no problems excellent product it does what it says would highly recommend it 👍
This is an absolutely wonderful piece of equipment providing clean filtered water straight out of the canal. It passes through 14 filters to ensure that the water is clean and safe to drink. The whole system us reasonably priced and is one of the most useful piece of equipment that I have ever bought for my boat.
Thank you Stephen!!
Excellent, it’s the best purchase I’ve made for a few years.
No more having to worry about where the next water point is and being able to shower without having to travel way down the canal to wind.
I bought it earlier this year and I will be able to get water during winter without having to break ice.
It takes up very little space on my well deck and I’m very happy with the service I’ve received.
Does a great job right from the start. Top piece ok kit, can’t praise it enough, would 100% recommend
I'm renovating a completely off-grid former lock keepers cottage which takes all its water from the canal. But, all good so far. The kit looks well assembled, and extremely good after sales support and advice so far. Some minor pipe connection leaks which were sorted out very quickly. Just delivered everything up to the cottage via tow path and narrowboat and will start installation and commissioning in the next few weeks. I'll post again once up and running, but so far a happy customer...
I was slightly sceptical at first because canal water is filthy, but after seeing lab tests and other results that Damian carried out I got the unit. It's better than expected with really good flow rates - better if it's closer to the water and there's a shorter hose to the tank. Doesn't use much power and means I don't need to fill my tank up at a watering point, something I found really annoying
One of the best decisions we’ve made since getting our narrowboat 3 years ago, no more chasing water points only to find them broken/inaccessible. No plumbing experience here but I managed installation start to finish in about 4 hours, all really simple, just about as close to “plug & play” as you can get!
Fellow boater friend has just seen our installation and has immediately bought one! Can’t say better than that…
We met the guys at the Crick Boat Show and we're very impressed by their approach to a solution for off grid water supply. It may not have the 'toys' of some other systems but it does exactly what you need at a much more acceptable cost. We chose the modular version which suited our needs and available space really well. We have been using the system whenever we were away from a shore supply and it has worked exactly as hoped and has taken away any anxiety of running out. Highly recommend.
I couldn't be happier with my water unit. Damien was great from start to finish. He told me about himself, how he got started, all about the system and answered all my questions. I had the unit shipped as I'm not in the London area. A few teething issues but Damien was always available on the phone to talk me through the set up. Now I can easily fill up between trips to the pump out, I don't worry about how long showers are anymore and I have great confidence in the quality of the water having tested it against our bottled water. In the months after my purchase Damien had kept in touch, asked how we have found the unit, provided updates on filters, add ons etc. I would definitely recommend getting in touch and having a chat. The new units are looking great too!
I purchased 'StageOne V2 + StageTwo bundle + RO Combo' in January 2025. 8 months in, it's an absolute game changer. It gives such peace of mind not having to worry about running out of water and being no where near a tap, especially in central London. The water quality is perfect - we barely use the RO unit, stage 1 and stage 2 produces perfectly clean water for drinking. In terms of customer support, Damien has been amazingly incredibly patient with me, a total novice. Plumbing in stage 2 was really awkward, mainly because the only place it could go was at ground level behind a built in cupboard. I had to do install lying down, contorting myself to loosen/tighten various pipes (in image). I made a lot of mistakes, like not using gas PTFE tape/liquid on brass fittings causing leaks. Installing RO unit was more straightforward, partly as lessons were learnt from cock ups made installing stage 2. Despite the stress of installation at times, which wouldn't have been possible without Damien's ongoing support, it's been completely worth it. Running out of water, for me, is the biggest stress factor living on a boat - that's now gone. Would 100% recommend.
Hi I set the off grid water up my self found it pretty straightforward we have the full set up We have been running it now for about 3 months with no problems excellent product it does what it says would highly recommend it 👍
This is an absolutely wonderful piece of equipment providing clean filtered water straight out of the canal. It passes through 14 filters to ensure that the water is clean and safe to drink. The whole system us reasonably priced and is one of the most useful piece of equipment that I have ever bought for my boat.
Thank you Stephen!!
Excellent, it’s the best purchase I’ve made for a few years.
No more having to worry about where the next water point is and being able to shower without having to travel way down the canal to wind.
I bought it earlier this year and I will be able to get water during winter without having to break ice.
It takes up very little space on my well deck and I’m very happy with the service I’ve received.
Does a great job right from the start. Top piece ok kit, can’t praise it enough, would 100% recommend
I'm renovating a completely off-grid former lock keepers cottage which takes all its water from the canal. But, all good so far. The kit looks well assembled, and extremely good after sales support and advice so far. Some minor pipe connection leaks which were sorted out very quickly. Just delivered everything up to the cottage via tow path and narrowboat and will start installation and commissioning in the next few weeks. I'll post again once up and running, but so far a happy customer...
I was slightly sceptical at first because canal water is filthy, but after seeing lab tests and other results that Damian carried out I got the unit. It's better than expected with really good flow rates - better if it's closer to the water and there's a shorter hose to the tank. Doesn't use much power and means I don't need to fill my tank up at a watering point, something I found really annoying
