Phox Water Filter

Last updated: 12 October 2026

What the Phox water filter is

Scott Dickson started Phox Water in Glasgow after looking for a way to filter his own tap water. The company launched its refillable cartridge in 2019, and Culligan, the American water treatment group, bought the business in 2023.

A standard filter cartridge goes in the bin when it runs out. With Phox, you keep the cartridge, empty it, and refill it with granules from a sachet. Phox says design, manufacturing, packing and distribution all happen within 50 miles of its Glasgow office.

What it does

• Refillable cartridge: one cartridge stays in the jug, and only the granules change.
• Three refill blends: Clean reduces common impurities, Softener targets hard water and limescale, and Alkaline reduces impurities while adding magnesium and calcium back in.
• Refill life: each sachet lasts 45 days or 200 litres, and a three-month pack holds two sachets.
• Letterbox refills: the packs are sized to fit through a standard UK letterbox.
• Reminders: the Phox app keeps track of when the next refill is due.
• Brita jugs too: a refillable cartridge fits jugs that take Brita Maxtra and Maxtra+ cartridges. Phox currently gives that cartridge away and charges only for the refill pack.

Key facts

• Phox V2: 2.2 litre glass jug with a matte black finish and a non-slip base, £39.99 with a three-month pack or £68.85 with twelve months
• Phox Wave: 2.8 litre plastic jug, £39.99 with a three-month pack or £64.60 with twelve months
• Refill packs: £14.99 for three months or £49.99 for twelve months, in Clean, Softener or Alkaline
• Running cost: a £14.99 pack covers 400 litres, which works out at roughly 3.7p a litre. By comparison, a six-pack of Brita MAXTRA PRO cartridges costs £37.49 for 900 litres, or about 4.2p a litre. Both prices were checked on 12 October 2026.
• Made in: Scotland
• Amazon rating: 4.4 out of 5 from 1,151 ratings on the V2 listing, checked on 12 October 2026
• Trustpilot: 4.7 out of 5 from 12,087 reviews of Phox Water, checked on 12 October 2026

Who the Phox water filter suits

• Hard-water households: the Softener and Clean blends both target the chalky taste and limescale that hard tap water brings.
• People cutting plastic waste: the cartridge is kept, so the bin only takes the spent granules and the sachet.
• Brita owners: the Maxtra-compatible cartridge lets you try the refills without buying a new jug.
• Gift buyers: the glass V2 works as a housewarming present at around £40.

We have used Phox at home, and our Phox water filter review covers how the refills work day to day.

The limits

Refilling takes more effort than clicking in a new cartridge. You have to empty the old granules and pour in the new ones, which can get messy over a sink.

The jugs are not large. The V2 holds 2.2 litres, so a busy household may refill it several times a day.

The glass V2 is heavier than a plastic jug and can break if dropped. In addition, the Wave is plastic, so you still buy some plastic up front.

Finally, the twelve-month bundles cost more up front, although the price per refill drops.

Where to buy the Phox water filter in the UK

Amazon UK sells the V2 with the Clean pack, sold by Phox Water UK, at £39.99 on 12 October 2026. For the Wave jug, the other blends and the refill packs, go to the Phox Water website.

Phox V2 on Amazon UK

CoolCuration previously offered a Phox referral discount on this page. That scheme is currently paused. We'll update this page if it returns. In the meantime, check the Phox site directly for any live promotions.

FAQs

How much does a Phox water filter cost?

The V2 glass jug and the Wave plastic jug both cost £39.99 from Phox with a three-month refill pack. Refill packs then cost £14.99 for three months.

Is the Phox water filter cheaper to run than Brita?

Slightly, on list prices. On 12 October 2026 a Phox refill pack worked out at about 3.7p a litre, against about 4.2p for Brita MAXTRA PRO cartridges bought in a six-pack.

How often do Phox refills need changing?

Every 45 days or 200 litres, whichever comes first. A three-month pack contains two sachets.

Can I use Phox refills in a Brita jug?

Yes. Phox makes a refillable cartridge that fits jugs taking Brita Maxtra and Maxtra+ cartridges, and you then buy the Phox refill packs for it.

Which Phox refill should I choose?

Phox recommends the Clean pack for hard water. The Softener pack targets limescale, and the Alkaline pack adds magnesium and calcium.

Where is Phox Water made?

In Scotland. Phox says its design, manufacturing, packing and distribution all happen within 50 miles of its Glasgow office.

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