If you are looking to buy distilled water in the UK, choosing the right size can make a considerable difference to both convenience and cost.
Distilled water is used across UK homes, workshops and businesses for everything from CPAP machines and humidifiers to steam irons, automotive applications, cleaning and technical use. But with single bottles, multipacks, 25 litre containers and bulk quantities available, how much should you actually buy?
This guide explains the different options, where to buy genuine distilled water in the UK, and how to choose the most suitable size for the way you use it.
Already know what you need? Shop our full distilled water range here →
Where Can You Buy Distilled Water in the UK?
Unlike bottled drinking water, genuine distilled water is not routinely stocked by many UK supermarkets. This can make finding it locally more difficult than people expect.
Many customers therefore choose to buy distilled water online from a specialist supplier, particularly when they need a specific quantity or use it regularly.
At The Somerset Clear Water Company, we supply UK-manufactured, lab-tested distilled water in sizes ranging from individual 5 litre bottles through to 25 litre containers and bulk supply.
View distilled water available for UK delivery →
Does Tesco Sell Distilled Water?
This is one of the most common questions people ask when trying to find distilled water locally.
Tesco may stock products such as bottled drinking water and, depending on the store, deionised water for certain household or automotive uses. However, genuine distilled water is not consistently available as a standard Tesco supermarket product.
It is also important not to assume that deionised water and distilled water are the same product. They are produced using different purification processes and can be suited to different applications.
We've covered this question in much more detail in our dedicated guide:
Does Tesco Sell Distilled Water? Read our UK buying guide →
If you are unsure whether you actually need distilled or deionised water, you may also find our comparison useful:
Distilled vs Deionised Water: What's the Difference? →
What Size Distilled Water Should You Buy?
The most economical option is not necessarily the biggest container. The best choice depends on how frequently you use distilled water, how much storage space you have and what you are using it for.
5 Litre Distilled Water
A single 5 litre bottle of distilled water is a useful starting point if you only need a modest amount or want to try distilled water before moving to a larger quantity.
It is particularly convenient for:
- Steam irons and garment steamers
- Occasional humidifier use
- CPAP humidifier chambers
- Steam mops and household appliances
- Car batteries and automotive maintenance
- Small cleaning or technical jobs
10 Litres – 2 × 5L Bottles
If you use distilled water regularly, buying a multipack can provide better value while keeping the water in convenient, easy-to-handle 5 litre containers.
Our 2 × 5 litre pack gives you 10 litres in total and is popular for regular household and appliance use.
Buy 10L Distilled Water – 2 × 5L →
20 Litres – 4 × 5L Bottles
For frequent users, buying four 5 litre bottles is often a practical way to reduce the cost per litre without having to store or lift a much larger container.
The 20 litre multipack is particularly useful for households running humidifiers or CPAP equipment regularly, people with several steam appliances, and businesses needing a regular supply.
Buy 20L Distilled Water – 4 × 5L →
25 Litre Distilled Water
A 25 litre container generally makes more sense when distilled water is being used frequently or in larger quantities.
Typical users include:
- Workshops
- Laboratories and education settings
- Engineering and technical users
- Automotive businesses
- Cleaning and detailing businesses
- Commercial users
Buying Distilled Water in Bulk
For businesses using distilled water continuously, repeatedly ordering individual bottles is rarely the most efficient approach.
Bulk distilled water may be more suitable for industrial, laboratory, manufacturing, automotive and other high-volume applications.
The Somerset Clear Water Company supplies distilled water in retail, trade and bulk quantities, including larger-volume options for commercial customers.
If your requirement is substantial or recurring, it can be worth discussing a trade supply arrangement rather than purchasing smaller packs individually.
Contact us for trade and bulk distilled water enquiries →
View Distilled Water Sizes & Bulk Options →
Is Buying More Distilled Water Cheaper?
In general, the cost per litre tends to fall when you buy larger quantities or multipacks. However, the cheapest option is only good value if you can comfortably store and use the water.
For occasional household use, a single 5L bottle may therefore make more sense. For regular users, 10L or 20L multipacks can offer a better balance of value and convenience, while 25L and bulk quantities are better suited to higher-volume users.
Compare all available sizes: Shop Distilled Water →
What Is Distilled Water Used For?
Distilled water has had dissolved minerals removed through a process of evaporation and condensation. This makes it useful where minerals in ordinary tap water could cause limescale, residue or deposits.
Distilled Water for Steam Irons
Minerals in tap water can contribute to limescale inside steam irons and garment steamers. Using suitable purified water can help reduce mineral deposits, although you should always check the manufacturer's instructions for your appliance.
Read: What's the Best Water for Steam Irons in the UK? →
Distilled Water for CPAP Machines
Distilled water is commonly used in CPAP humidifier chambers because its very low mineral content helps minimise mineral deposits and residue.
Always follow the instructions supplied by your CPAP manufacturer regarding the water suitable for your particular machine.
Read: Best Water for CPAP Machines UK →
Distilled Water for Humidifiers
If an ultrasonic humidifier leaves a fine white dust around a room, dissolved minerals in tap water are often responsible. Distilled water contains very few dissolved minerals and can substantially reduce mineral residue.
Read: Why Is My Humidifier Leaving White Dust? →
Distilled Water for Cleaning
Because distilled water contains very little mineral content, it can also be useful for certain cleaning and rinsing applications where avoiding mineral residue is important.
For larger-scale window and glass cleaning, however, deionised water is often the more practical choice.
Read: Distilled vs Deionised Water for Window Cleaning →
Distilled Water Has More Uses Than You Might Think
Steam irons, humidifiers and CPAP equipment are some of the best-known applications, but distilled water can also be useful in a surprisingly wide range of household, beauty, cleaning and technical situations.
Discover 10 Distilled Water Hacks Everyone Should Know →
How to Tell If You're Buying Genuine Distilled Water
When shopping online, don't assume that every product described as "pure water", "purified water" or "demineralised water" has actually been distilled.
Look for a supplier that clearly states the purification method and provides appropriate product information.
Distilled water is created through distillation: water is heated to produce vapour and the vapour is then condensed back into liquid form. Deionised water, by comparison, is commonly produced using ion-exchange technology to remove charged ions.
Neither term should simply be substituted for the other when your appliance, process or application specifically calls for one type.
Why Buy Direct from The Somerset Clear Water Company?
At The Somerset Clear Water Company, we manufacture and supply distilled water for customers throughout the UK.
- UK-manufactured distilled water
- Lab-tested for quality and consistency
- 5L, multipack and 25L options
- Bulk supply available for higher-volume customers
- Suitable options for household, trade and technical use
- UK delivery direct to your door
Whether you need one bottle for a household appliance or a regular commercial supply, you can choose the quantity that best matches your usage rather than trying to find genuine distilled water on a supermarket shelf.
Frequently Asked Questions
Where can I buy distilled water in the UK?
You can buy distilled water online from specialist UK suppliers including The Somerset Clear Water Company. Specialist suppliers generally offer a wider choice of sizes than supermarkets, including 5L bottles, multipacks, 25L containers and bulk quantities.
Does Tesco sell distilled water?
Tesco does not consistently stock genuine distilled water as a standard supermarket product. Some stores may stock deionised water or other purified-water products, but these should not automatically be considered the same as distilled water.
Read our complete Tesco distilled water guide →
Do UK supermarkets sell distilled water?
Genuine distilled water can be difficult to find consistently in UK supermarkets. Supermarkets predominantly sell spring, mineral and drinking water, while specialist distilled water is more commonly purchased from dedicated suppliers online.
Can I buy 5 litres of distilled water?
Yes. A 5 litre bottle is one of the most convenient sizes for household use, including steam irons, humidifiers, CPAP humidifier chambers and a range of cleaning and technical applications.
Can I buy distilled water in bulk?
Yes. Distilled water is available in larger containers and bulk quantities for businesses, laboratories, workshops, industrial users and customers with recurring high-volume requirements.
Contact us for trade and bulk distilled water enquiries →
View Bulk Distilled Water Options →
Is distilled water the same as deionised water?
No. Distillation and deionisation are different purification processes. Both can produce low-mineral water, but they are not necessarily interchangeable for every application.
Compare Distilled vs Deionised Water →
Is distilled water just boiled water?
No. Simply boiling water does not create distilled water. During distillation, water is converted into vapour and that vapour is collected and condensed back into liquid, separating it from dissolved minerals and many other impurities.
What is the best size of distilled water to buy?
For occasional use, 5 litres is usually convenient. Regular household users may prefer 10L or 20L multipacks, while 25L containers and bulk supply are generally more suitable for frequent commercial or technical use.
What is the cheapest way to buy distilled water?
For regular users, buying multipacks or larger quantities will normally reduce the cost per litre compared with repeatedly buying individual bottles. The best-value option depends on how much water you actually use and how much you can comfortably store.
Ready to Buy Distilled Water?
Choose the quantity that suits the way you use it:
- Buy 5L Distilled Water →
- Buy 10L Distilled Water – 2 × 5L →
- Buy 20L Distilled Water – 4 × 5L →
- Buy 25L Distilled Water →
VIEW THE COMPLETE DISTILLED WATER RANGE →