Doulton Ecofast & Biotect Ultra Undercounter Water Filter System review
Households wanting permanent under-sink filtration on its own dedicated tap, rather than a countertop jug or a filter cartridge to swap every few weeks.
By Tom Calder · Price last checked 20 Sep 2026, 12:29 BST · price-tracked
A well-built under-sink system from a 200-year-old British filtration brand, built around a WRAS-approved ceramic cartridge, with solid contaminant reduction and a straightforward DIY fit. The flow rate is modest and you'll need a dedicated tap, so it costs and takes more effort to install than a jug filter — but it's low-maintenance once in.
as of 20 Sep 2026, 12:29 BST · Details
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- Biotect Ultra cartridge is WRAS-approved and independently tested to NSF/ANSI protocols, reducing more than 99.99% of bacteria and cysts, plus 99.5% of lead and 95.5% of free chlorine
- Long filter life — roughly 2,300 litres or 6 months — means far fewer cartridge changes than a jug filter
- Fits out of sight under the sink and retains beneficial minerals, unlike reverse osmosis
- Flow rate of around 1.9 litres/minute is modest — filling a large jug or pan takes noticeably longer than mains pressure
- Needs a dedicated tap (sold separately) plus a spare tap-hole or hole conversion, so total cost and install effort is higher than plug-and-play options
Who shouldn't buy this
Skip this if you rent and can't drill a tap hole, or if you just want quick, better-tasting water with no plumbing — a jug or tap-mounted filter does that for a fraction of the cost and effort.
Key specs
| Filter technology | Biotect Ultra ceramic + activated carbon block |
| Filter life | ~2,300 litres or 6 months, whichever comes first |
| Flow rate | ~1.9 litres/minute (approx. 114L/hour) |
| Installation | Under-sink DIY fit, typically under 1 hour |
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Alternatives to consider
as of 20 Sep 2026, 12:29 BST · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.co.uk at the time of purchase will apply to the purchase of this product.as of 20 Sep 2026, 12:29 BST · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.co.uk at the time of purchase will apply to the purchase of this product.Want this cheaper?
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