Frequently Asked Questions
The main questions about choosing and ordering your system.
Choosing your system
Which system do I need?
Start with our system selector. Answer three quick questions about your water source, what you'll use it for and how much water you need.
You'll see suitable systems and prices to compare, with no email required.
Can I use it for drinking and cooking?
For canal, river and collected rainwater setups, we recommend FinalStage RO after suitable pre-filtration for drinking, cooking and food preparation. Use the RO tap for your kettle, pasta, rice and soup, as well as a glass of water.
The right treatment depends on your source and installation. Test your treated water to check that it's suitable for drinking and cooking, and keep up with filter changes and tank hygiene. See our water testing results.
Can't I just boil the water for cooking?
Boiling kills germs, but it does not remove heavy metals or nitrates. As water evaporates, these can become more concentrated. Water for cooking needs to be safe to drink before it goes into the pan.
Reverse osmosis can reduce dissolved contaminants, including nitrates and metals such as lead, which boiling leaves behind. That's why we recommend FinalStage RO for cooking as well as drinking. The reduction achieved depends on the contaminant, membrane, water conditions and maintenance.
Why do your systems cost less than some alternatives?
We sell direct and keep our overheads low. Installation is optional, so you only pay for it if you need it.
Stage One, Stage Two and Rain use standard cartridge formats, giving you a choice of replacement suppliers. We put the money into the equipment and keep the price fair.
Installation and upkeep
Can I install it myself?
Yes, our systems are designed for straightforward installation. Most customers fit Stage One in around one to two hours using basic tools, though the time depends on your setup.
Read the instructions before starting. If you'd like someone to do it for you, we can point you towards independent installers in the areas they cover.
How often do I change the filters, and what does that cost?
It depends on how much water you use and how dirty it is. As a rough guide, annual consumables have typically cost £60–£170 for canal setups and £40–£80 for rainwater. Heavy use or dirtier water can cost more.
Follow the replacement guidance for your system and change filters sooner if needed. We sell replacement filters and parts, and can help you choose the right ones.
Ordering and support
When will my system arrive?
The current estimated dispatch date is shown on each product page, including any pre-order timing. Delivery time is additional to dispatch time.
If you need your system by a particular date, or your delivery location changes after ordering, get in touch and we'll help you plan.
What support and warranty are included?
Get in touch if something goes wrong. We'll help identify the issue. Our parts warranty means we supply a covered replacement part and help you fit it. Callouts aren't included.
Can I cancel or return my order?
If you need to cancel or return an order, contact us with your order number and we'll explain the next steps.
Our terms set out the cancellation periods, return conditions and any exceptions for genuinely personalised or custom-made products.
Something else? Use our contact form.