Why filter tap water?
Tap water in the UK is among the most rigorously tested in Europe. Yet chlorine treatment, ageing pipes and trace contaminants can leave water tasting or smelling unpleasant. The result: many households buy bottled water, at a significant financial and environmental cost.
A tap filter delivers great-tasting water while retaining essential minerals. It is also far cheaper than bottled water and more convenient than a filter jug that must be filled and left to drain.
How to choose a tap water filter
1. Filtration quality
The number of filtration stages is a key indicator. A single-layer filter (typical of a jug) retains fewer contaminants than a multi-stage system. Activated carbon remains the benchmark technology for removing chlorine, bad tastes and certain organic pollutants. Adding UV provides an extra layer of disinfection.
2. Cartridge lifespan and cost per litre
A longer-lasting cartridge means fewer replacements and a lower cost per litre. A 600-litre cartridge needs changing roughly every month, whereas a 2,000-litre cartridge lasts 3 to 4 months for a typical family (around 15 to 20 litres per day).
3. Ease of installation
A good filter should install without tools and fit most standard taps. Check the compatible diameter range and how many adaptors are included.
4. Energy independence
Some filters need batteries or mains power for their display or UV system. A filter powered by hydraulic energy (water pressure) is more practical and eco-friendly.
Comparison: Puramane vs standard filter vs filter jug
| Criterion | Puramane | Standard filter | Filter jug |
|---|---|---|---|
| Filtration stages | 8 stages (activated carbon + UV) | 1 stage | 1 stage |
| Cartridge lifespan | 2,000 L (3-4 months) | 600 L (~1 month) | 150 L (~1 month) |
| Cost per litre | €0.02 | ~€0.05 | ~€0.07 |
| Filter price | €44.90 | ~€30 | ~€15 |
| Replacement cartridges | €24.90 (pack of 2) | ~€15 (single) | ~€20 (pack of 3) |
| LED display | Yes (temperature + filter status) | Basic indicator | No |
| Power source | Hydraulic (no battery) | No battery | No battery |
| Installation | 2 min, no tools, 6 adaptors | ~5 min, no tools | None |
| Compatibility | Taps 16-24 mm | Standard taps | N/A |
| Warranty | 2 years | 2 years | Varies |
Our verdict: why Puramane stands out
The Puramane filter offers the best value for money on the market in 2026. With 8 filtration stages (versus one for most alternatives), a cartridge lasting 2,000 litres (3 to 4 months) and a cost of just €0.02 per litre, it is the most economical choice in the long run.
The LED display showing water temperature and filter status is a genuine daily convenience: you know exactly when to change the cartridge. Battery-free operation via hydraulic energy eliminates the hassle of replacing cells.
Installation takes 2 minutes with no tools, and 6 adaptors are included for taps from 16 to 24 mm. Puramane is a French brand based in Fontenay-aux-Roses (92260), with a 2-year warranty.
Key takeaway:For a family of four using 15 litres per day, the Puramane filter costs around €9 per month (cartridge), compared with €30 to €50 for bottled water.
Frequently asked questions
What is the best tap water filter in 2026?
The best filter depends on your priorities. In terms of value for money, the Puramane filter stands out with 8 filtration stages, a cost of 0.02 euros per litre and a cartridge that lasts 2,000 litres (3 to 4 months). It runs without batteries thanks to hydraulic energy and features an LED display.
How much does a tap water filter cost per month?
Monthly costs vary by model. With the Puramane filter, a pack of 2 cartridges costs 24.90 euros, roughly 6 to 8 euros per month for a family. That is significantly cheaper than bottled water (around 30 to 50 euros per month for a family of four).
Is a tap filter as effective as a filter jug?
Tap filters are generally more effective. The Puramane uses 8 filtration stages including activated carbon and UV sterilisation, whereas a standard filter jug has only a single stage. A tap filter also delivers filtered water on demand, with no waiting.