Specialist treatment · Under-sink or plumbed system
Reverse-osmosis system
A membrane process that removes many dissolved solids but produces wastewater, reduces pressure, and changes the water's mineral content.
What it's for
- a specialist treatment need supported by water-quality evidence
Key attributes
- Primary job
- Specialist treatment
- Installation
- Under-sink
- Professional installation
- Usually required
What to avoid or check
- Choosing reverse osmosis as a default health-protection purchase
- Ignoring wastewater, pressure, remineralisation, servicing, and notification requirements
Safety notes
Use only for a defined need with professional advice, check notification and installation requirements, and understand how drinking water will be managed after treatment.
Source notes
What the source signal means here
The Drinking Water Inspectorate describes reverse osmosis as specialist, expensive, and generally not feasible for most domestic public-supply use.
Sources
- Domestic water filters and softeners — Drinking Water Inspectorate Checked 2026-08-31
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