10 Best Instant Hot Water Heater Under Sink in The UK

Last updated on 20/07/2025

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Fudeer 220V 5.5Kw Stainless Steel Instant Electric Water Heater, Mini Tankless Water Heater with Digital Display for Kitchen/Bathroom Sink, Under/Above Counter, Adjustable Temperature 30-45℃(Silver

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Why We Love It

Instant hot water delivery.
Easy temperature control options.
Durable stainless steel design.

Main Highlights

【Instant Hot Water at Your Fingertips】Get hot water within 20 seconds of turning on the heater, with a temperature range of 30-45℃. The water temperature adjusts automatically based on the inlet water temperature and flow rate, providing instant hot water for your daily needs.
【Digital Display & Temperature Control】 Equipped with a clear digital display, this water heater shows real-time water temperature. Use the "+" and "-" buttons to easily adjust the output temperature to your desired level, perfect for washing dishes, hands, or face.
【Durable Stainless Steel Construction】Made with high-quality stainless steel housing and heating elements, this water heater is resistant to high temperatures, corrosion, and rust. The stainless steel design ensures long-lasting durability and prevents scale buildup.
【Compact Tankless Design, Saves Space】 The mini tankless design eliminates the need for a bulky storage tank, making it ideal for small spaces. It can be installed under or above the sink, saving valuable space in your kitchen or bathroom while avoiding scale accumulation.
【Energy Efficient & Safe to Use】 This on-demand water heater heats water only when needed, reducing energy consumption and saving on electricity bills. It features multiple safety protections, including overheating and dry-fire protection, ensuring safe and reliable operation for your home.
【Note】When using hot water, if the water flow rate is very low, the actual water temperature will be very high. (2) Although the faucet temperature is displayed on the screen, the actual outlet water temperature may be slightly different. (3) If you have any questions about the electric faucet, please contact us immediately.

Briwellna Electric Instantaneous Tankless Water Heater 5.5kW 220V, Instant Hot Water Heater with Digital Display for Kitchen Bathroom Sink Counter Under/Above Home Indoor (White)

5% OffFree Shipping

Why We Love It

Unlimited hot water on-demand.
Efficient, space-saving design.
Ensures multiple security protections.

Main Highlights

[On-demand, Umlimited Hot Water] Briwellna Non-Thermostatic Tankless Electric Water Heater is ideal for a single sensor faucet or a single metering faucet for handwashing and other fixed-flow applications.
[Compact Size Fits Almost Anywhere] This water heater is designed specifically with replacements in mind. The smaller dimensions (210mm×172mm×73mm)makes it easier to swap out your existing less-efficient water heater.
[Flexible Installation in Any Orientation] The product can be installed at any angle and the display will be automatically adjusted when the product is installed upside down.
[Save Energy and Time] Equipped with the latest integral cast aluminum heating technology, this water heater produces instant hot water without storing water, preheating devices or an attemperator, saving power consumption, water, time and space. It can be shut off by turning off water or power supply
[Multiple Security Protection] Smart protection functions protect the product from leakage, over-temperature, dry heating and over-pressure. We offer one-year warranty.
[Easy Installation] Coming with multi-language user's manual, it's easy to install the faucet without plumbers. Video of installation guadiance is available. It can be installed above or under the sink. Please make sure the water pressure required(0.04-0.8MPa) and your breaker panel to dedicate 25A(5500W) double pole breakers solely to the unit. The water connector size is 1/2". Fits both old style 1/2" hose connector and 3/8" water supply system(with adapters).

Electric on Demand 220-240V 2-3KW Hot Water Heaters 10L Safty Plug Point of Use Boiler Wash Under Sink on with Digital Temperature Control Smart Control

14% OffFree Shipping

Why We Love It

Compact design saves space.
Adjustable high-temperature limit.
Simple and easy installation.

Main Highlights

Compact and Versatile Design: The VINABUKS Electric Water Heater features a smart 3.3-gallon (15L) tank, perfect for point-of-use applications. Its compact size fits effortlessly under sinks, making it ideal for kitchens, bathrooms, utility rooms, offices, and RVs. This space-saving design ensures hot water is always within reach.
Instant Hot Water: Experience the convenience of immediate hot water at your fingertips. This water heater offers a fast recovery rate, providing instant hot water whenever you need it. The efficient 220V US safety plug ensures safe and reliable performance.
Complete Installation Kit Included: This water heater comes with all necessary accessories for a seamless installation, including 2 PCs compression stainless steel water hoses, 1 pressure relief valve, and 1 tee fitting. The user-friendly design ensures a quick and easy setup process.
High Energy Efficiency: Equipped with advanced insulation materials and a high-efficiency design, the VINABUKS water heater minimizes heat loss and maximizes energy savings. Its rapid heating capability ensures you get hot water on demand, reducing energy consumption and saving on your utility bills.
Durable and Safe Construction: Built to last, the VINABUKS water heater features a high-quality stainless steel tank and a leak-proof design. It includes multiple safety features such as overheat protection and a pressure relief valve. With reliable customer support, you can trust in its long-term safety and performance.

ThermoMate ELEX5.5 Instantaneous Electric Water Heater with LED Display, 5.5kW Hand Wash Water Heater for Basins Sinks, Over/Under Sink Water Heaters, ‎Hard Wire 220V

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Why We Love It

Instant heating, endless hot water.
Advanced flow control feature.
Convenient temperature control display.

Main Highlights

【2S INSTANT HEATING & ENDLESS HOT WATER】- Turn on the water tap and endless hot water will come out within 2 seconds on demands when require, hence you will never run out of hot water and only pay for what you really use. Savings of up to 50% on water heating costs.
【EXCLUSIVE ADVANCED FLOW CONTROL & WATER LEAKAGE PREVENTION】- Unique technology is applied to improve water flow and prevent any water from splashing or dripping. You can adjust the flow rate you want to meet your needs in any time. Maximum hot water flow rate: 3L/min
【FLEXIBLE INSTALLATION】- When inverting the installation, the numbers automatically flip over. When the electric washbasin is in operation, the LED displays the current water temperature in real time, so you can easily get hot water at the desired temperature. The temperature range of 35 to 55°C can be selected by touch control.
【EXCEPTIONALLY DURATION】- Built in high quality alloy bare heating element, it is corrosion-resistant and acid-resistant; flowing water prevents limescale from building up, which prolongs its service lifespan.
【TWO INSTALLATION APPLICATIONS OPTIONAL】- Functional for both over sink and under sink installation, display will reverse automatically. Act as primary heater, with water being injected from cold mains directly; Act as booster heater, with hot water being injected from a storage tank. It is free to connect to a mixer tap.Water Inlet and outlet sizes G1/2‘’

2.5L 1500W Instant Hot Water Tap Boiling Tank 3 in 1 Boiling Water Tap Boiler 4 in 1 Hot Tap Boiling Unit Temperature Adjustable from 75°C to 98°C

Why We Love It

Adjustable temperatures for versatility.
User-friendly large touch screen.
Auto-Reheat for energy saving.

Main Highlights

Supply 98°C near boiling water to your instant boiling taps with temperature adjustable preset temperatures between 75°C and 98°C,to meet your different daily needs of beverages: 75°C for fruit tea, 80°C for scented tea, 90°C for coffee, 98°C for red tea.
The boiler should work with a anti-scale water filter (not included). The boiler inlet supports fast plug 1/4" connection, as well as G3/8 connection (a 1/4" to G3/8 male adaptor is included) to most of water filters in UK market. The boiler outlet connects to a boiling tap by silicone hose inner diameter 5mm or or G3/8 connection ( adaptor included).
User-friendly inteface with large touch screen display. Preset your boiler simply with a finger tip. The large circle boiling status led indicator. Easy to ready and operate.
Auto-Reheat when boiling water drop down 5°C lower than preset temperature. Save electricity on energy saving mode, the boiler will auto reheat when temperature is 10°C lower.
Operating pressure: 1.5 to 5 bar. 2 Year Warranty. Important tips: a anti-scale water filter is a must for boiling unit. Please change the water filter every 6 month to keep boiler guarantee valid. ****Improper installation may caused leaking, please contact us for professional assistance. **** Boiler is not suitable for Qettle, Franke, Quooker taps.

2KW 220/240V UK Plug 8L Small Under Sink Tank, Thermal Storage Water Heater, Mini Tankless, Under Sink, Electric RV TR Trailer Kitchen Compact Point of Use

23% OffFree Shipping

Why We Love It

Powerful and efficient performance.
Saves energy and money.
Easy installation process.

Main Highlights

💧 Point of Use Design The FVSTR 2.16 GALLON Electric Water Heater is designed to provide immediate hot water at various points of use, making it ideal for homes, offices, and small commercial settings.
👌 Adjustable Thermostat Equipped with a precise adjustable thermostat, this water heater allows you to set and maintain the perfect water temperature for your needs, ensuring comfort and energy efficiency.
🔌 Standard 240-volt electrical connection , this water heater is easy to install without the need for specialized electrical work, fitting seamlessly into most residential and light commercial environments.
🏠 Compact and Durable Its compact design saves space, making it suitable for installation in tight spots. The stainless steel construction ensures durability and resistance to corrosion, providing a long-lasting hot water solution
💧 Drain Valve Includes a built-in drain valve for easy maintenance and hassle-free water drainage. This feature simplifies the process of cleaning and maintaining the unit, prolonging its operational life.
🔧 Easy Installation The compact and versatile design allows for straightforward installation in various locations. Detailed installation instructions are included, ensuring a hassle-free setup process.
🍃Save Money $:The 2KW power rating ensures low energy consumption, reducing electricity bills without compromising performance.Designed to provide maximum efficiency with minimal energy usage, making it an economical choice for your hot water needs.Unique insulation technology enables your thermal energy to last longer without wasting a penny，We are truly an environmental protection product

VELPAX Mini Electric Water Heater, 15L Electric Instantaneous Water Heate,1500KW 220V,Waterproof Under Sink Water Heater with Digital Display for RV Kitchen Bathroom

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Why We Love It

Instant hot water availability.
Durable and corrosion-resistant materials.
High efficiency saves energy.

Main Highlights

【Electric Mini Tank Water Heater】-The Electric Mini Tank Water Heater,1500-watt heating system delivers instant hot water in seconds without preheating,with more safety protection such as anti-freezing protection,over heating protection, 15L hot water can be output per minute. The maximum temperature raise is 158 °F.
【Durable and Long Service】- The internal materials of instant hot water heater electric 110v are made of high-temperature calcined layer and enamel layer, which have corrosion resistance, rust prevention,and anti-corrosion properties.Stainless steel heating tubes and built-in magnesium rods can effectively purify water quality and extend service life.Integrated stainless steel tank body and Polyurethane CFC-free filling layer ensure the stability of the tank body and excellent insulation.
【Super High Efficiency】-Small Hot Water Heater Energy efficient with plenty of hot water,also known as demand-type or instantaneous water heaters, provide hot water only as it is needed,our water heaters with thermal efficiency up to 90%,Instant hot water at the point of use, whenever needed,Also equipped with a high-definition intelligent digital LED display,effortlessly adjust the temperature between 86°F-158°F according to your preferences.
【Easy Assemble and Use】-This Electric Tank Water Heater,for 1/2" NPT water hose connection,with Leakage protection fitting 1/2" NPT, pressure relief valve, two 3FT hoses,15L small tank water heaters,Compact design,The product dimensions are 11 x 11 x 11 inches, can be wall or floor-mounted in a discreet location.
【Satisfaction Guarantee】-We feel confident that you will love our mini tank water heater. If there's something makes you unsatisfied, please don't hesitate to contact us. We would offer you 100% refund or a replacement within 3 months.

Bellanny Mini Electric Water Heater, 1.5KW 220V Electric Instantaneous Water Tap with 10L Water Tank, IP4X Waterproof Under Sink Water Heater with LCD Digital Display & Temperature Knob, UK Plug

13% Off

Why We Love It

Heats water incredibly fast.
Provides hot water instantly.
Durable stainless steel construction.

Main Highlights

【Fast Heating】 This instant water heater adopts advanced instantaneous heating technology, which heats up quickly and greatly saves time waiting for hot water. The single-piece compact insulation design not only reduces energy consumption, but also ensures a continuous supply of hot water. Whether you are washing up in the morning or bathing in the evening, you can turn on the water immediately and enjoy a comfortable living experience.
【On-Demand Water Supply】 This compact water heater eliminates the long wait for hot water at the sink, allowing you to get hot water on demand whenever you need it. Whether you're washing your hands, face or dishes, it's ready to use, providing convenience and comfort. Whether you are a domestic user or a commercial establishment, this water heater is the ideal choice for you.
【Quality Material】This under sink water heater is made of stainless steel tubes with excellent anti-pollution ability, which can adapt to a variety of complex water quality environments. Whether it is hard water or soft water, it can ensure the long-term stable operation of the water heater and extend its service life. High-quality material selection, so you can use it with confidence and peace of mind.
【Safety & Reliability】 This water heater adopts a one-piece moulding design, effectively preventing erosion in bathroom and kitchen environments. Over-pressure protection function: when the pressure in the liner exceeds the safety rated pressure, the safety relief valve will automatically release the pressure. Dry burn prevention function: when the liner dries out, the secondary insulation protection will immediately cut off the power supply and automatically stop working.
【Flexible Installation】 Compact in size, this small electric water heater can be easily placed in the kitchen, lounge, bathroom or anywhere else you need it. The exquisite design not only saves space, but also blends into various home environments and enhances the overall aesthetics. Whether it is wall-mounted or vertical installation, it can meet your personalised needs and make life more convenient.

Sararoom 1500W Electric Water Heater, 220V Mini Under Sink Water Heater with LCD Display and Temperature Knob, Instant Water Tap with 10L Water Tank for Kitchen, Lounge, Bathroom, UK Plug

13% Off

Why We Love It

Instant hot water, always.
Energy-efficient and consistent heating.
Compact, space-saving design.

Main Highlights

【On-Demand Water Supply, Instant Enjoyment】Say goodbye to long waits and embrace hot water instantly! This compact under sink water heater eliminates the wait for hot water at the sink and delivers hot water whenever you need it. Wash your hands, face or dishes at the touch of a button for unprecedented convenience and comfort. Ideal for both domestic and commercial settings, it makes life better. Upgrade your water experience today and start a new chapter of instant hot water!
【Extremely Fast Heating, Time-Saving Magic】Enjoy the convenience and efficiency of instantaneous water heaters! Adopting advanced instantaneous heating technology, no need to wait for hot water, enjoy warm water quickly. The integrated compact adiabatic layer design not only reduces energy consumption, but also ensures a constant flow of hot water. Whether it's washing up in the morning or bathing at night, it's ready to use, embracing a new experience of comfortable living.
【Selected Materials, Adaptable to a Variety of Water Quality】Durable and reliable, adaptable to thousands! The water heater selects stainless steel piping, strong anti-pollution ability, easy to deal with a variety of complex water quality environment. Hard water and soft water can be easily, long-term protection of stable operation of the water heater, to extend the service life. High-quality materials, so you can use worry-free, peace of mind every moment.
【Integrated Moulding, Safety Guardian】The water heater adopts an integrated moulding design, effectively resisting the erosion of the external environment. Overpressure protection: when the pressure in the inner liner exceeds the safety rating, the safety relief valve will automatically release the pressure, guarding the liner and your personal safety. Anti-dry burn protection: when the inner liner is short of water, the secondary insulation protection will immediately cut off the power supply.
【Nimble Installation, Space Artist】Small stature, flexible to fit into every inch of space! The compact design of the mini electric water heater can be easily placed in the kitchen, living room, bathroom or any corner. Exquisite appearance in the space-saving at the same time, perfect integration into various home environments, enhance the overall aesthetic. Wall-mounted or vertically mounted, the mini water heater meets all your individual needs, making your life more convenient.

Instant Electric Tankless Water Heater 220/240V, FVSTR Small Smart Portable Self-Modulating on Demand Use Under Sink Kitchen Household Shower, Hot Water for House Shower [Energy Class A] (7.5KW)

25% OffFree Shipping

Why We Love It

Instant and sufficient hot water.
Convenient digital display control.
Compact and versatile positioning.

Main Highlights

【Installation Note】that the approval of the relevant distribution network operator (DNO) is required for installation and that the installation of the products may only be carried out by the distribution network operator itself or by an installation company entered in the operator's list of installers.
【REMOTE CONTROL】 The tankless water heater comes with digital display & touch control panel so temp setting is easy job. Now turn on the tap and let the smart unit do the rest, you needn’t go through hard lesson about temp setting by a mixer tap without any hint. The model comes with Remote control, useful for installation under sink.
【SMART SELF ADJUSTMENT】 The hot water heater adjusts power input based on flow rate and temp setting in real time. For example, less power will be applied by the system when waterflow reduced, thus you still get ideal temperature instead of scalding hot water, which means comfortable experience. Optimal energy efficiency of 98% saves considerable electric charge.
【SAFE and DURABLE】 Applied with multiple protection devices, every piece goes through strict tests to ensure 100% safe. Inner water and electricity lines are designed to run separately so as to avoid leakage or harm of scale build up. Approval by ETL and qualifies for UL, you can expect outstanding performance for years to come..POINT of USE The sleek tankless water heater is compact as an oatmeal box, making it possible to install anywhere close to outlet and avoid energy waste
【Simple Installation】1/2-Inch Water heater connector. In order to install whole house tankless water heater electric 7.5KW 240V it requires 240 Voltage, 2 x Double-POLE 30AMP, wire gauge 2 x 8AWG, please check to confirm that your breaker panel meet these specifications. 2-year limite warranty and 24/7 customer support services
【Installation Note】that the approval of the relevant distribution network operator (DNO) is required for installation and that the installation of the products may only be carried out by the distribution network operator itself or by an installation company entered in the operator's list of installers.
【INSTANT HOT WATER HEATER 】- Applied with 7500W/11000W heating system, the electric tankless water heater supplies instant hot water, 3 seconds to get hot water without preheating. Instant consistent and endless hot water of the maximum temperature reach to 55℃/131℉. It is perfect companion for sinks, bringing you perfect experience of comfort and relaxing
【Installation Note】that the approval of the relevant distribution network operator (DNO) is required for installation and that the installation of the products may only be carried out by the distribution network operator itself or by an installation company entered in the operator's list of installers.

8.7

Excellent

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We scanned 1634 products

We reviewed these offers relevant to the Instant Hot Water Heater Under Sink within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like Fudeer, Briwellna, VINABUKS, thermomate, Generic, FVSTR, VELPAX, Bellanny, Sararoom, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Instant Hot Water Heater Under Sink in the market, we considered we took a deep dive into 8171 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis is Fudeer 220V 5.5Kw Stainless Steel Instant Electric Water Heater, Mini Tankless Water Heater with Digital Display for Kitchen/Bathroom Sink, Under/Above Counter, Adjustable Temperature 30-45℃(Silver. We love many things about this product by Fudeer. What sets it apart from the competition is Instant hot water delivery. , Easy temperature control options. , Durable stainless steel design. .
The best value product for most shoppers and where user satisfaction is continuously the highest is Briwellna Electric Instantaneous Tankless Water Heater 5.5kW 220V, Instant Hot Water Heater with Digital Display for Kitchen Bathroom Sink Counter Under/Above Home Indoor (White) by Briwellna based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Instant Hot Water Heater Under Sink and the best cost-to-value ratio is Instant Electric Tankless Water Heater 220/240V, FVSTR Small Smart Portable Self-Modulating on Demand Use Under Sink Kitchen Household Shower, Hot Water for House Shower [Energy Class A] (7.5KW)at FVSTR with a 25% discount.
Our list of the best Instant Hot Water Heater Under Sink is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.

10 Best Instant Hot Water Heater Under Sink in The UK

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We concluded that: