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Aquarius Direct

~ NO.1 SELLING WATER FILTER IN MALTA ~

~ 30-DAY MONEY-BACK GUARANTEE ~

AD300S

THE ULTIMATE FILTRATION SYSTEM

AD300S - Image 2
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AD300S

0.1 Micron Under-Sink Water Filter

Price range: €184.00 through €404.00

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30-Day Money Back
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Free Delivery within Malta:

2-3 working days from the date of your order (if ordered Mon-Fri)

We hope you are happy with your purchase. However, if you are not completely satisfied with your purchase for any reason, you may return it to us for a full refund, or an exchange. Please contact us at support@aqua.direct for further information.

Our promise
All our products come with a 30-Day Money Back Guarantee if you are not entirely satisfied with the quality of your mains water, once connected.

Enjoy complete peace of mind with your purchase, supported by our 1-year warranty and lifetime technical assistance.

If you receive a damaged or incorrect item, please contact support@aqua.direct with your order details and a photo of the issue — our team is ready to help.

Should your product develop a fault within the warranty period due to a manufacturing defect (excluding damage from misuse, accidental breakage or direct water supply), we will be happy to arrange a free return, provide a complimentary repair, or send a replacement at no extra cost.

SAVE UP TO 60%

WITH THE GOVERNMENT GRANT

We will email you the link to claim your grant upon purchase of your filter system.
Eligible applicants will get a one-time grant of 60% OFF the purchase price to purify water at home.
Aquarius Direct filters fall under the ‘2025 Tap Water Scheme’, issued by the government.

(Subject to a maximum grant of €100 and does not apply to replacement filter purchases)

0.1 micron water filters

Some of the most effective filters for drinking water

Capacity

60,600 litres per year 166 litres per day

PFAS Reduced

From non-stick/fire-resistant products

For Cold Water

For use with any cold water tap in your home

Our best-selling four-stage water filter

The Aquarius AD300S is a four-stage filter system that, like the AD300, removes more than 99% of the most dangerous contaminants in water, significantly improving the taste. The AD300S also reduces the build up of limescale in hard water areas.

What’s Inside the AD300S:

Advanced UF (Ultrafiltration) Membrane, Active Carbon Block, Felt & Sediment technology for ultra-fine particle removal.

1

4-Stage Filtration

2

Better Taste

attachment

Odour-Free Water

4

Removes Chlorine

5

Removes Microplastics

1

4-Stage Filtration

2

Better Taste

attachment

Odour-Free Water

4

Removes Chlorine

5

Removes Microplastics

Aquarius Direct 4-in-1 filter system

For clean, fresh and safe mains drinking water.

Benefits of the AD300S:

  • Easy to replace by just unscrewing the old filter.
  • Easy to install filter can be attached under the sink or on the cupboard floor under the sink.
  • Easy attached to mains water and your sink tap.
  • Save money from water jug filters.
  • Takes up a lot less space compared to other filter systems.

What the AD300S removes:

Chlorine, Taste & Odour, Microplastics, Limescale, Heavy Metals, Sand, Silt, Scale, Clay, Organic Material, THM, Herbicides, Pesticides, Cyst, Bacteria, Sediment, Hormones… and many more.

“Installed the ADS300S water filter and we are more than satisfied. Easy to install, no taste or smell of clohrine and we are also happy with the taste. Highly recommended.“

Jason Cordina | April 2025

What's Included in our Starter Kit

Aquarius Filter & Head
Filter Tubing
Filter Attachments
Filter Install Guides

See the Specification (‘Specs’) tab for tubing and attachment sizing

Filters Tested in the USA, UK and Malta

Aquarius Direct filters are independently tested and certified to meet the highest safety and performance standards – including NSF in the United States, WRAS in the United Kingdom, and full approval in Malta.

Money Back Guarantee

Our promise
All our products come with a 30 Day Money Back Guarantee
if you are not entirely satisfied with the quality of your mains water, once connected.

Filter Dimensions

Width 92mm
Depth 102mm
Height 390mm

tubing and attachment sizing

What’s included:

  • 3/8 x 1/2 female adapter
  • 3/8 x 1/2 male adapter
  • 2x 3/8 x 3×8 stem elbows
  • 2x 30cm length of 3/8 LDPE tube

Our filters are tested in Malta, USA & UK.

Technical information

AD300S – 0.1 micron carbon filter

Operational conditions

Flow rate: 25 GPM (9.46 LPM) at 60 psi

Pressure: 30–125 psi (2.1–8.8 kgf/cm²)

Temperature: 4–38°C

Capacity: 60,600 litres / 166 litres per day

Inlet/Outlet size: 3/8 inch

Filtration: 0.1 micron

Function: Chem/Mechanical Reduction

Flushing: 15 minutes

Notice
  1. Systems certified for cyst reduction may be used on disinfected water that may contain filterable cyst.
  2. Do not use with water that is microbiologically unsafe or of unknown adequate disinfection before or after the system.
  3. For cold water only.
  4. The term ‘bacteriostatic’ indicates that the system limits the passage or growth of bacteria that may already exist in the incoming water. It does not mean that water leaving the system is safer to drink than water entering the system.
  5. Replace cartridge when the flow rate becomes too slow and contact your local dealer or place where you purchase.
  6. The disposable filter cartridge must be replaced every year, at the rated capacity or if noticeable reduction in flow occurs.
  7. Test was performed under standard laboratory conditions, actual performance may vary.
  8. This warranty shall not apply to any failures damaged by abuse, misuse, alteration, or failure to follow operating.
  9. In high pressure areas, PLV (Pressure Limiting Valve) be adjusted at 4 kgf/cm² should be fitted at all times.

Reviews

Frequently Asked Questions

How does the Aquarius Direct water filter work?

The Aquarius Direct filter is connected directly to the main cold-water supply, usually under the kitchen sink. It removes impurities to provide clean and great-tasting water straight from your tap.

No, Aquarius Direct filters do not require electricity to operate.

No, our filters do not produce any water waste. They are directly connected to the main cold water supply, ensuring that all filtered water goes straight to your tap.

Yes, Aquarius Direct filters improve the taste of tap water by removing chlorine, chemicals, and heavy metals. If you are not satisfied with the taste, we offer a 30-day money-back guarantee.

No, a separate tap is not necessary. Our filters are designed to work with your existing tap, allowing you to use filtered water for drinking, cooking, and washing dishes. However, if you prefer a separate tap, we can provide one upon request.

We do not offer water tasting because water quality varies by location due to different mineral content. However, we provide a 30-day money-back guarantee, so if you are not satisfied, you can return the filter.

The filter replacement schedule depends on the model:

  • AD18 – every 12 months
  • AD200 – every 18 months
  • AD300 – every 18 to 24 months
  • AD300S – every 18 to 24 months

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