Reviews
Water filter product reviews
Compare the fit, upfront price and replacement costs of six water filter systems. Each review gives a verdict, practical drawbacks and alternatives. To see all six side by side, use the under-sink comparison.
Research-based reviews. Manufacturer documents, published testing and product feedback where available. Tap Sorted has not tested these products. Some reviews contain affiliate links, disclosed on the relevant pages.
The six reviews
Photo: Doulton
Dedicated tap, evidence you can check
Doulton Kingfisher with Biotect Ultra
£299.90 with pillar tap
Five years: £564.95, before fitting
The Kingfisher’s main strength is independently listed filtration, with a single cartridge to maintain.
Photo: Doulton
Second stage, higher running cost
Doulton HIP DUO with Biotect Ultra
£349.90 with pillar tap
Five years: £1,307.50, before fitting
The HIP DUO pairs a Biotect Ultra cartridge with one pre-filter you choose from five, in a different housing from the Kingfisher.
Photo: Aquaphor
Cheapest complete kit with a tap
Aquaphor Crystal Solo
£79.99 tap included
Five years: £217.93, before fitting
At £79.99 the Crystal Solo is the cheapest complete kit on our list that comes with its own tap, and its £22.99 K2 makes it the cheapest dedicated-tap system to run: £217.93 over five years.
Photo: Aquaphor
Budget three-stage kit
Aquaphor Crystal three-stage
£129.99 tap included
Five years: £477.93, before fitting
The three-stage Crystal is £129.99 with a standard drinking tap and three cartridges, K3, K2 and K7.
Photo: Waterdrop
Lowest price, uses your existing tap
Waterdrop WD-10UA
£70.00 uses your existing tap
Five years: £201.96, before fitting
At £70.00 the WD-10UA is the lowest hardware price on our list and, at £201.96 over five years, the cheapest to run.
Photo: UK Water Filters
Sold for limescale
UK Water Filters Anti-Scale kit
£97.00 tap included
Five years: £366.73 to £666.43, before fitting
This is a budget kit aimed specifically at limescale at one drinking-water tap.
Choosing between them
- The under-sink comparison puts all six side by side, with picks by need and matched totals.
- The filter taps page covers the taps, and the cartridge page covers what each system takes.
- Not sure an under-sink system suits your kitchen? Start with the under-sink guide or countertop and gravity filters.