How do instant boiling water taps work?
Most work by having a thermally-insulated tank or boiler which stores the boiling water, so it is ready on-demand. When you press the handle or pull the lever, cool water rushes into the water, displacing the boiling water through the tap and into your mug or pan.
Upon releasing the lever, the hot water stops. The boiler then reheats the contents, ready for next time.
Because of this, there is usually a limit as to how much hot water is available at any one time, but there is a good chance you won’t have to wait long for it to all reheat.
Things to consider
There is often more to an instant boiling water tap than an ordinary tap, and they are much more complicated appliances:
These store and heat the boiled water. The size of these differs but are commonly around 3 litres.
The boiler is designed to fit under your sink, so ensure you have the space for this before you start.
They also commonly use electricity supply to heat up the water, so a plug socket is needed. If there isn’t one readily available under your sink, or if something like a washing machine or dishwasher is already plugged into it, then you may need the help of an electrician.
Some boiling water taps are 4-in-1, so can also filter cold drinking water and act as your ordinary household tap as opposed to being used additionally.
There are also some which produce fizzy carbonated water too, but these are rarer. You pay a price for these features, but if you think you’d get the use out of them then it could be a good investment.
Do you have a busy household which you can’t keep an eye on constantly? If you have children who are at an age where they can help themselves to water, there is an obvious risk associated with boiling water being readily available from the tap.
A lot of instant boiling taps now have additional safety features, such as splashback prevention or having to do more than simply pull a lever to gain access to the hot water. You don’t necessarily have to pay through the roof for these features, so it is definitely worth looking into.
Many taps allow you to adjust the boiler temperature. This is good if you like to be able to drink your tea and coffee almost immediately after pouring rather than having to wait for it to cool naturally if it is at 100°.
Instant boiling water taps can range from about £400 to well over £1000. The high-end products are usually more technical but could be worth the extra money according to the specifications