Here’s waterdrop X12 serves up purer, tastier water in three seconds flat – and it’s cheaper than ever
Here are three kitchen irritations you’ve probably experienced, particularly if you live in a hard water area: your kettle wearing a nasty coat of limescale on its innards; your fridge packed to the gills with pricy bottled water; and your filter jug somehow always being empty when you’re at your thirstiest, because someone couldn’t be bothered to refill it after their cuppa.
Well, what if one smart kitchen product could fix all three at a stroke?
That’s the idea behind Waterdrop’s X12. It’s an under-sink reverse osmosis (RO) system that pipes purified water to its own smart faucet, which sits next to your main tap. It’s a far bigger kitchen upgrade than you might think.
Under pressure
Reverse osmosis might sound like it belongs in a school chemistry lab, but the principle is refreshingly (no pun intended) simple. Mains water gets pumped through a membrane with pores so tiny that only water molecules can pass through (in the X12’s case, it’s just 0.0001 microns). Dissolved solids and contaminants are left behind to be flushed away.
Furthermore, the X12 builds 11 stages of filtration around that membrane, including a UV light stage to blast bacteria. The result is water with reduced levels of lead, fluoride, chlorine, arsenic, PFAS “forever chemicals”, microplastics and more. And you don’t have to take Waterdrop’s word for that: it’s independently tested and certified to NSF/ANSI 42, 58 and 372 standards.

Once everything has been stripped out by RO, water can taste a little flat; the X12 fixes this by adding calcium and magnesium back in, and balancing the pH at around 7.5. The result is a crisp, clean taste you’ll notice in everything from your sunrise coffee to the stew you’re whipping up for supper.
That makes it a great fit for hard water areas, too. The heavy mineral load that can coat kettles and leave an unsightly film on your cup of Earl Grey gets filtered out, and only a light dose of minerals goes back in. So, you can top up your kettle from the X12 without having to factor in the bi-monthly de-scaling session.
No tank, no problem
Traditional RO systems store purified water in a bulky tank under your sink. The X12, however, is tankless, instead filtering on demand – and delivering up to 1,200 gallons per day. Its compact size means installation is DIY-friendly, and all the fittings you need come in the box.

The smart faucet makes daily use effortless. It’s fast, filling a cup in about three seconds. Choose a set volume and it dispenses exactly that, so you can fill a pan or a water bottle without hovering.
Its built-in display shows real-time TDS (total dissolved solids) readings, letting you check your water quality at a glance, and also reminds you when a filter needs replacing – which won’t be as often as a filter jug, because the main RO filter lasts up to two years.
The X12 is water-wise as well. The 3:1 pure-to-drain ratio means just one glass goes down the drain for every three you drink, which is far more efficient than older RO designs. And if your household would otherwise get through around 2 litres of bottled water a day, using the X12 instead could replace roughly 1,460 500ml bottles a year – meaning fewer bottles to buy, carry home and recycle.
Pure and simple
The Waterdrop X12 normally costs £1,299, but right now you can get it for £1,099 by entering the code WDX12 at checkout.The X12 is an investment, and its long-term value comes from reducing reliance on bottled water – helping cut repeat purchases, plastic waste and the hassle of keeping your fridge stocked. And if you’re planning to upgrade, the X12 will drop to £879 from 6–7 October during Waterdrop Filter’s October Prime Days.Free UK delivery, 30-day returns and a two-year warranty are all included.
Crusty kettles, overstuffed fridges and empty filter jugs? Consider these problems washed down the drain. Head to the Waterdrop website and Amazon to give your kitchen the X factor.