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Hydrofast W100 is a desktop water purifier with 6-stage filtration, UV, mineralization, and instant water heating. We tested it

August 20, 2026 4 min read 0 comments
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Modern households and offices are increasingly turning to smart water purification solutions. Hydrofast W100 is a top-of-the-line desktop water purifier that combines advanced reverse osmosis technology, instant water heating, and UV sterilization in one compact device. Thanks to its versatility, it will fit perfectly in your kitchen, office, or bedroom—without the need for complicated installation.

Better price under €300

Hydrofast W100 water purifier you can find with a trusted seller Geekbuying. It’s stocked directly in the European warehouse, which means very fast delivery—already within a week—and with no extra fees. Don’t forget to use the coupon from the price box.

There are also variations of the device with a coffee maker or the standalone filter HF03 (4-in-1 composite filter). Geekbuying currently doesn’t have the HF02 filter (reverse osmosis filter) in stock, but you can find it on the seller’s official website.

Important: Orders from Geekbuying come with our VIP support, which you get after downloading our extension for the Chrome browser on desktop only (for this store, never shop through the app). Right after payment, send us your order number so we can check that VIP support is valid!
ChinaPlanet deal

Hydrofast W100

Hydrofast W100
349,00 €You save 60,00 €
289,00 €
CouponNNNHYW100

Price history

20,83 €cheaper than the average price
Cheapest 289,00 €Most expensive 329,00 €
Is it your first time shopping on Geekbuying? See the guide!
Updated 29. 7. 2026 at 10:44
TIPExpress delivery from the Polish warehouse with no customs duty and VAT.

This product will be delivered to you express from a local Polish warehouse. Delivery from Poland usually takes 7–10 days and is handled by a courier. When it’s delivered, you won’t pay any additional fees—no customs duty and no VAT.

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Read our review

We tested this device and we’re using it ourselves at home right now. We have to say it’s a great water purifier, especially for those who don’t have space under the sink for a reverse osmosis filter. This device replaces it perfectly, but of course it requires a larger worktop. We didn’t find any bigger downsides, since it can completely replace the kettle with instant water heating.

Water heating in 3 seconds and precise temperature thanks to the smart display

Hydrofast W100 offers up to 8 water temperature options and can heat water in literally 3 seconds. Whether you want to prepare delicate green tea, instant porridge, or coffee, you can set the ideal temperature easily via the colorful touch display. There are also 3 preset modes and up to 15 water volume settings, so you can choose exactly how much water you need. Practical night lighting ensures comfort even during evening use.

Touch control is complemented by a child lock that prevents accidental starting of hot water. The purifier is therefore safe for the whole family, including kids.

Premium 6-stage filtration with mineral enrichment

At the heart of the system is advanced reverse osmosis with a 0.0001 μm membrane, which removes up to 95% TDS and more than 1000 types of harmful substances. The filter handles heavy metals, chlorine, bacteria, and fluoride. While standard RO filters “drain” the water, Hydrofast W100 goes the other way—it remineralizes the water and balances its pH, creating naturally great-tasting and healthier water.

The filtration system consists of 6 layers: PP / CTO / PCF / MIN / RO / UV. In addition to standard filtration, it also offers UV sterilization that eliminates up to 99.99% of bacteria and viruses continuously, 24 hours a day.

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Eco-friendly and low-waste

Hydrofast W100 boasts an efficient clean-to-waste water ratio of 3:1, meaning that compared to other RO systems it produces very little waste water. It can filter up to 2000 liters of water with a single set of filters, replacing up to 6000 plastic bottles.

RO membrane lasts up to 12 months, and the composite filter lasts approximately 9 months. Regular automatic filter regeneration and a simple replacement mechanism by turning ensure smooth maintenance. There’s also a smart reminder for when it’s time to replace the filters.

No installation required and ideal for any room

A big advantage is the “plug & play” installation. Just plug it in and you can use it anywhere—kitchen, bedroom, or office. It’s ideal for households of 2–3 people, as it features a 4-litre water tank and a daily output of up to 100 GPD (about 380 litres).

A 700 ml cup fills in about 60 seconds. The body is made from BPA-free safe materials and comes with certified components according to the highest food standards.

Hydrofast W100 water purifier specifications

Below you’ll find the basic specifications of the water purifier in a clear table:

Product name Hydrofast W100
Filtration type6-stage RO with UV and mineralization
Filtration performance2000 L / replacement
Water heatinginstant / 3 seconds
Temperatures8 levels
Water volume15 optional modes
Water tank4 L
Daily water output100 GPD (approx. 380 L)
Ratio of clean water / waste water3:1
Sterilization24-hour UV disinfection
MaterialBPA-free / food-grade plastic
Displayyes / colored
Safetychild lock
Dimensions / placementcompact / freestanding
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