Phase 2 · proof of scale
Compare domestic water-treatment formats by practical job, installation, upkeep, and the evidence you should ask a supplier to show.
Public tap water in England and Wales is regularly tested and domestic treatment is not generally required as a health-protection measure. Check your water company's quality report and ask for evidence covering the exact product and claim before buying.
Remove a filter or try a broader term. Missing data is kept missing rather than guessed.
A refillable jug with a replaceable carbon-containing cartridge, mainly for people who want to change tap-water taste or odour without plumbing.
A compact tap attachment with a replaceable cartridge. Fitment, flow, cartridge availability, and exact claims vary by model.
A plumbed unit serving one drinking-water tap. Installation, capacity, upkeep, and validated reduction claims are model-specific.
A physical filter for particles above its rated size, considered only after the cause of discolouration or debris has been investigated.
A plumbed system that exchanges hardness minerals for sodium, mainly to reduce scale and improve lathering rather than to make public tap water safer.
A membrane process that removes many dissolved solids but produces wastewater, reduces pressure, and changes the water's mineral content.
Scope and safety
Start with the job you actually need done. The finder compares categories rather than ranking brands, and it does not assume that a filter is necessary for health protection.
Important: Public tap water in England and Wales is regularly tested and domestic treatment is not generally required as a health-protection measure. Check your water company's quality report and ask for evidence covering the exact product and claim before buying.