If you want one tap to replace your kitchen mixer and provide filtered drinking water too, start with the QETTLE Original 4-in-1. The linked QETTLE Original 3-in-1 is a simpler replacement mixer with no separate filtered-cold flow. The QETTLE Mini 2-in-1 is a secondary tap for boiling and filtered water alongside the mixer you already have.
These are three specific 2-litre UK packages, not interchangeable QETTLE configurations. All need an under-sink boiler and filter, a suitable electrical socket, plumbing and enough room for the filter and vent connection. The 2-litre tank provides up to four cups before recovery; check the exact package and installation instructions before ordering. We have compared listings and manufacturer information, not tested the taps ourselves.
Our top pick for a replacement mixer
QETTLE Original 4-in-1, 2-litre
It gives mains hot and cold, filtered cold and true boiling water through one tap. Choose it when you want the extra drinking-water function; the 2-litre boiler is a limitation if you regularly need more than four cups in one go.
Best boiling water taps UK at a glance
This is a focused shortlist of three QETTLE packages, not a comprehensive comparison of every UK brand. We checked other makers, including InSinkErator’s 4N1 Touch, but did not find an additional exact Amazon UK package with the same combination of listing detail, maker installation information and customer-feedback evidence to justify a like-for-like pick. The 4N1 Touch is also described by its maker as near-boiling, so it should not be treated as a direct true-100°C substitute.
| Exact package | Choose it for | Tank and fitting space | Key trade-off |
|---|---|---|---|
|
QETTLE Original 4-in-1 2-litre chrome mixer |
One replacement tap for mains hot/cold, filtered cold and boiling water | 2L tank: 293 H × 170 W × 223 D mm; allow at least 80mm above, plus 344mm-high filter housing | Only up to four cups before tank recovery; needs hot and cold feeds |
|
QETTLE Original 3-in-1 2-litre chrome mixer |
A replacement tap for mains hot/cold and boiling water without a filtered-cold outlet | Linked package lists a 2L tank and filtration system; check the supplied 2L boiler drawing before fitting | Still requires filter changes, but gives no separate filtered-cold drink |
|
QETTLE Mini 2-in-1 2-litre chrome secondary tap |
Keeping your existing mixer and adding boiling plus filtered water | 2L tank: 293 H × 170 W × 223 D mm; a separate 35mm tap hole and filter space are needed | Cannot replace the normal hot/cold mixer |
On a phone, swipe the table sideways to compare every column.
All three linked packages are listed with 2L boilers. The maker’s older 3-in-1 installation PDF illustrates a 4L system, so do not use its 4L layout as proof of the linked 2L package’s fit; check the supplied 2L instructions and measurements before installation.
How we chose these boiling water taps
We retained three exact UK listings with distinguishable purposes and a traceable QETTLE installation and maintenance route. Amazon offers, reviews and seller bundles can change; confirm the linked variation still includes the tap, boiler, filtration and fittings shown before purchasing. A broader cross-brand verdict would require equally strong evidence for the exact competing package, not simply a product-family specification or a similar-looking listing.
Best complete replacement mixer
1. QETTLE Original 4-in-1, 2-litre
Why buy: It replaces the ordinary mixer while adding filtered cold drinking water and QETTLE’s stated 100°C boiling flow. The exact linked variation is the 2-litre chrome package, not a 4- or 7-litre upgrade. QETTLE says its standard package includes the tap, boiler tank, Q08 cartridge, filter housing, plumbing fittings and installation guide; verify the seller’s box contents when ordering.
Space and services: The 2L boiler measures 293 H × 170 W × 223 D mm. Plan at least 80mm clearance above it, room for the roughly 344mm-high filter housing and access to the vent/waste connection. QETTLE specifies 1.5–5 bar for the water feeds, a 35mm tap hole and an accessible 13A socket for the boiler. Replace the Q08 cartridge every six months and deep-clean the tank annually.
Drawback: Up to four cups before recovery may be limiting for bigger households. Check QETTLE’s current warranty terms: the Original chrome tap has one year on its finish and two years on working parts; boiler and filter system are listed at two years.
Simpler replacement mixer
2. QETTLE Original 3-in-1, 2-litre
Why buy: The linked Q9231PV package lists a chrome 3-in-1 mixer, 2-litre boiler and filtration system. It supplies normal hot, normal cold and boiling water without a separate filtered-cold drinking flow. QETTLE’s own UK seller listing confirms the 2L variant and standard fittings.
Space and services: Allow for both tank and filter even though there is no filtered-cold outlet. QETTLE’s 3-in-1 guide requires 1.5–5 bar water pressure, a 35mm tap hole, a suitable 13A socket and a vent connection to the waste. Its guide is for an older 4L package, however; ask for the supplied 2L installation drawing and verify its tank size and hose route before cutting or fitting. The filter still needs six-monthly replacement.
Drawback: It saves an output, not the filtration hardware or maintenance. QETTLE’s own 2L seller listing states a two-year system warranty; confirm the terms applying to the current seller and finish before ordering.
Best secondary tap
3. QETTLE Mini 2-in-1, 2-litre
Why buy: This is a separate boiling-and-filtered-water spout for a kitchen where the main hot/cold mixer will stay. The exact linked variation is the 2-litre Mini. QETTLE lists the Mini tap, boiler, Q08 cartridge, filter housing, standard plumbing fittings and guide as the system components.
Space and services: The 2L boiler measures 293 H × 170 W × 223 D mm; allow 80mm above it for hoses and space for the filter and vent. The Mini needs a separate 35mm tap hole, a 1.5–5 bar cold-water supply and an accessible 13A socket. Its guide specifies a pressure-limiting valve in the supplied system. QETTLE says to change the filter every six months and clean the boiler annually.
Drawback: It does not dispense everyday mains hot and cold water, so it cannot replace the existing mixer. QETTLE lists two years on the boiler and filter system, two years on tap working parts and one year on the Original chrome finish.
3-in-1 vs 4-in-1 boiling water taps
A 3-in-1 tap commonly provides normal hot water, normal cold water and boiling or near-boiling water. A 4-in-1 tap usually adds filtered cold drinking water. However, names are not perfectly consistent between sellers, so compare the four actual outputs rather than relying on the label.
A 4-in-1 system makes most sense when filtered cold drinking water is useful. The 3-in-1 removes that separate outlet, but its boiler still uses a replaceable filter; do not assume it removes ongoing cartridge costs.
Boiling vs near-boiling water
Not every product described as a boiling-water tap delivers water at 100°C from the spout. Many systems provide water a few degrees below boiling. That is hot enough for many drinks and cooking tasks, but buyers who specifically want genuine boiling water should verify the manufacturer's stated delivered temperature for the exact model.
Tank size and cupboard space
The tank normally shares the sink cabinet with pipework, a trap, cleaning products, bins and sometimes a water-softening system. Measure the usable three-dimensional space and allow access for filter changes and servicing. For the linked 2L QETTLE packages, allow for the 293 H × 170 W × 223 D mm boiler, at least 80mm above it for hoses, and the separate filter and vent assembly. A larger tank can serve more cups before recovery, but it does not help if it prevents the cupboard from working properly.
Installation and safety
Follow the manufacturer's installation requirements and use appropriately qualified tradespeople for plumbing and electrical work. Check water pressure, socket position, ventilation and the route of every hose before cutting the worktop. If children or vulnerable users may operate the tap, examine the actual safety control rather than assuming every model works in the same way.
Filters and ongoing costs
All three linked packages use a filter, including the 3-in-1 without a filtered-cold outlet. QETTLE specifies a new Q08 cartridge every six months and an annual tank deep-clean. Replacement cartridges, servicing and descaling determine the long-term cost. Hard-water households should pay particular attention to the manufacturer's maintenance instructions. Before buying, check that replacement filters are readily available and whether using third-party consumables affects the guarantee.
Are boiling water taps worth it?
A boiling tap is worth considering when it removes an often-used kettle, provides filtered drinking water or makes a busy kitchen easier to operate. It is harder to justify when hot drinks are occasional, cupboard space is already tight or the installation would require significant plumbing and electrical alterations. Convenience is the main benefit; do not assume the energy saving alone will repay the purchase quickly.
Frequently asked questions
What is the best boiling water tap in the UK?
The QETTLE Original 4-in-1 is the strongest all-round choice for most kitchen renovations because it combines normal hot and cold water with filtered cold and true boiling water. The right model still depends on available cupboard space, water pressure and whether filtered cold water is useful.
What is the difference between a 3-in-1 and 4-in-1 boiling water tap?
A 3-in-1 tap commonly provides normal hot, normal cold and boiling or near-boiling water. A 4-in-1 tap usually adds filtered cold drinking water. Terminology varies, so check the listed outputs for the exact model.
Do all boiling water taps deliver water at 100°C?
No. Some taps deliver genuine boiling water, while others provide near-boiling water a few degrees below 100°C. Check the manufacturer's stated delivered temperature for the exact model if true boiling water matters to you.
Can a boiling water tap replace a normal kitchen tap?
Many 3-in-1 and 4-in-1 models replace the normal mixer by providing mains hot and cold water alongside boiling or filtered water. A few instant-hot systems use a separate dedicated spout, so check the design before planning the sink area.
Do boiling water taps need electricity?
The under-sink tank normally needs a suitable electrical supply as well as plumbing connections. Follow the manufacturer's instructions and use appropriately qualified tradespeople for the electrical and plumbing work.
How often do boiling water tap filters need changing?
The interval varies by system, water quality and usage. Follow the manufacturer's schedule and check replacement-filter availability and cost before purchasing the tap, particularly in a hard-water area.
The bottom line
Choose the QETTLE Original 4-in-1 if you want one credible all-round recommendation. The QETTLE 3-in-1 is better when filtered cold water is unnecessary. Choose the QETTLE Mini when you want filtered cold and boiling water from a separate secondary tap while retaining the existing mixer.
Planning the surrounding kitchen matters as much as choosing the tap. Read our guides to planning a kitchen island, choosing kitchen worktops and reducing kitchen renovation costs before finalising the installation.
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