Three questions. A sensible starting point.
Not a medical recommendation or a claim that you need RO. This quick tool helps narrow a shortlist based on your practical requirements.
Step 1 of 3
Can you connect a system beneath the sink?
Is instant hot filtered water important?
What is the main reason you're shopping?
Suggested next step
Reality check: If you have an issue with tap-water colour, smell or a supply warning, check your water supplier or a relevant professional before choosing a filter. For most UK mains-water users, a drinking-water filter isn't required for health protection.
Sources & verification
Facts below are taken from the linked sources; product information may change. Last editorial check: 13 November 2026. No hands-on product testing was performed.