COST GUIDES
Boiling water tap: Cost breakdown 2026
Updated 06/26
Tired of waiting for the kettle to boil? An instant boiling water tap could be the life hack you're after.
Find out the average boiling water tap cost, including installation, in this handy guide.
Fast Facts
The average cost of a boiling water tap is around £450
Prices increase dramatically if you splash out on high-end models
You'll also need to budget for the installation, which is around £50 (includes fitting both the tap and under-sink boiler unit)
You may also need to factor in a call-out charge, which is usually around £110
An instant boiling water tap should be installed by a qualified plumber to ensure safety and maintain warranties
How much does a boiling water tap cost?
| Cost provided item | Low cost | High cost | Average cost |
|---|---|---|---|
| Cost of boiling water tap | £250 | £1,000+ | £450 |
| Boiling water tap installation | £41 | £58 | £50 |
| Last updated: June 2026 Our costs are ballpark averages - get a local tradesperson to quote now | |||
Wondering why an instant boiling water tap costs so much more than an ordinary kitchen sink tap? Simply put, boiling water taps are:
Sophisticated heating appliances
Feature built-in safety mechanisms
Include an under-sink boiler unit to keep water at the right temperature
Let's look at the price difference between an entry-level boiling tap versus anda premium 4-in-1 boiling water tap.
1. Boiling water tap cost: Entry-level
Entry-level boiling water taps typically start at around £250, excluding installation. Here's what to expect:
Instant boiling water only, or at a push, a two-in-one tap (delivering boiling and regular cold water)
Basic stainless-steel finish
Small under-sink tank (approximately two to three litres)
Standard safety features, such as child-lock mechanisms
Built-in filters (most boiling water taps have this add-on feature nowadays)
2. Boiling water tap cost: Premium
Top-of-the-range boiling water taps typically start at around £1,000+ , excluding installation.
Splash out on a premium model, and you can expect:
Multi-functions in one tap (boiling, hot, cold, filtered and sometimes sparkling water)
Extra features, such as flexible, pull-out hoses
High-end designs and finishes, such as copper and chrome
Smart controls
Larger tank capacities for busy homes (up to seven litres)
Precise temperature settings (100°C water every time)
Longer warranties (expect around two years)
Added safety features (such as aerated spray to prevent scalding and cool-touch insulated spout)
A word on average boiling water tap costs: The prices above are based on models from leading boiling water tap brands, like Quooker and Franke. While cheaper alternatives are available, they may offer lower build quality and shorter warranties.
Boiling water tap installation cost
Most prices for boiling water taps don’t include installation.
But the good news is, boiling water tap installation generally takes an hour, keeping labour costs down.
As a general steer, here are the installation costs involved:
The average plumber cost is £50 per hour
You may also need to factor in a call-out charge, which is usually around £110
The rates above assume the existing kitchen tap hole is standard size (35mm) and a 13A power socket is close to the sink.
Costs might be higher if additional plumbing or electrical work is needed. That's why we recommend getting multiple quotes from plumbers in your local area.
Connect with checked tradespeople for an exact quote
Find plumbers we've checked and approved in your area using our free mobile app below to request an exact quote.
Boiling water tap cost calculator
Not quite ready to contact a tradesperson? Why not try our free cost calculator tool for an instant estimate for your instant boiling water tap?
Job Estimate Calculator
What should your boiling water tap installation quote include?
Hire right, and your installation quote should typically include:
Removal of the old tap (if needed)
Installation of the boiling water tap and under-sink boiler unit
Connection to existing water and electrics
Safety testing
That said, it's always worth checking exactly what's included before work begins. Contact a local plumber to get an exact quote.
Or read on to learn about the main cost factors to know about.
Find a plumber near me
What affects the cost of a boiling water tap?
Homeowners are often surprised by how much the cost of a boiling water tap can vary. Here's what affects the cost:
Design – Premium finishes such as brushed brass or copper come with a higher price tag
Brand – Quooker is widely regarded as one of the best if you're after 100°C water every time, but you'll pay a premium
Tank size and capacity – Larger tanks that can deliver more boiling water at once cost more
Functions and features – A 4-in-1 boiling water tap will be more expensive
Extra plumbing and electric works – Creating a new power supply under the sink (if needed) adds to your cost
A qualified plumber can give you a precise quote for the job based on your kitchen's current set-up.
Hidden boiling water tap costs to watch out for
There are also some maintenance costs involved with a boiling water tap for a kitchen, such as:
Water filtration cartridges – Some models require replacement filters every 6-12 months
Maintenance and servicing – Manufacturers recommend servicing to maintain performance and warranty cover
Replacement parts – Tanks and other components may need replacing over time
Energy use – Boiling water taps do have ongoing running costs (more on that in our FAQs below)
Looking for more ideas for your kitchen décor? Checkatrade is here to help with your latest kitchen improvements, from planning guides to expert advice about tips for refits.
Are instant boiling water taps worth it?
For many homeowners, once they've upgraded to an instant boiling water tap, there's no going back to a traditional kettle.
Pros:
Saves time
Quieter and easier to use than a kettle
Can we used for filtering water
Saves space
Multi-purpose (for hot drinks and cooking)
Cons:
Upfront costs can be expensive
Requires a professional installation, so DIY isn't an option
Needs ongoing maintenance to prevent limescale buildup
Occasional replacement of parts, such as filters
Find reviewed plumbers covering your local area
Ready to start your search? Simply enter your postcode below to see the checked tradespeople covering your local area.
Boiling water tap: Cost checklist
FAQs
Are boiling water taps safe?
Yes, boiling water taps are safe when used correctly and professionally installed. They are well insulated and have extra safety features such as child locks. This means that they can’t be turned on accidentally. However, you should take the same care and precautions as you would around any source of boiling water.
Does a boiling water tap use less energy than a kettle?
It costs approximately 3p per day in electricity to keep a boiling water tap on standby. When you draw boiling water, it costs under 1p per litre to heat. Meanwhile, it costs around 3p per boil for a full kettle, depending on current electricity prices.
Do boiling water taps require any maintenance?
Yes, boiling water taps do require regular maintenance. You will need to replace the filter occasionally, which will require an engineer or plumber. You can also get your tap regularly serviced to keep it in good working order.
What is the best boiling water tap to buy?
The best boiling water tap depends on your household's needs and budget. Compare factors such as water output, tank size, energy efficiency, running costs, warranty cover, and any additional features you want.
Do you need a plumber to fit a boiling water tap?
Yes, it's best to hire a qualified plumber to install a boiling water tap. Professional installation makes sure the system is fitted safely, works correctly, and complies with the manufacturer's warranty requirements.
Can I install a boiling water tap myself?
We don't recommend installing a boiling water tap yourself. For starters, you're installing an expensive piece of kit. Secondly, you'll be working with boiling water, so there's a danger of scalding yourself if it's not fitted correctly.
For a quality installation and to maintain your instant boiling water tap warranty, always hire a professional.
See the tradespeople we've checked for your job