Description
Coldstream CA653 Under-Sink Water Purifier
The Coldstream water purifier is an under-sink filtration system designed to deliver high-quality drinking water directly from the tap. Fitted to your cold water supply, it uses an advanced combination of ceramic and carbon filtration to significantly reduce contaminants while retaining essential minerals for a natural taste.
Key benefits
- Advanced filtration : significantly reduces chemical pollutants, heavy metals, bacteria, PFAS, viruses and microplastics, while preserving essential salts and electrolytes. Performance varies by contaminant — see detailed test results.
- Easy to install : plug-and-play system compatible with 15 mm pipes (Europe) or ½″ (USA) and a 7/16″ BSP threaded tap.
- Long-lasting quality : replaceable ceramic cartridge designed to filter up to 10,000 L — approximately 5 to 6 months of household use.
- Simple maintenance : external self-cleaning that extends cartridge life and maintains optimal flow rate.
- Eco-friendly and cost-effective : no electricity required, zero water waste, manufactured in the United Kingdom.
- Complete kit : housing, cartridge, wall bracket, service key and plumbing accessories.
Technical specifications
| Feature | Detail |
|---|---|
| Recommended cartridge | CF521W Max (ceramic + carbon) |
| Filtration capacity | Up to 10,000 L (~5–6 months) |
| Maximum flow rate | ~2.5 L/min |
| Pipe connections | 15 mm pipe (EU) or ½″ (US), 7/16″ BSP tap |
| Installation required | Under sink, by a qualified installer |
| Maintenance | Cartridge replacement, cleaning recommended every 5 days of inactivity |


