Genuine replacement filters for our Water Gem domestic under-sink water filter system, which is manufactured in-house in the UK from WRAS approved materials.

Available in singles or packs of 2 or 4 giving 6, 12 or 24 months of crystal clear great tasting filtered water.

Read more

Consider this alternative


Name Price Availability Qty
£15.90 Inc. VAT
Availability: Temporarily Out of Stock, Still Available to Pre-Order
£15.90 Inc. VAT
£16.52 Inc. VAT
Availability: In stock
£16.52 Inc. VAT
£28.66 Inc. VAT
Availability: In stock
£28.66 Inc. VAT
£49.60 Inc. VAT
Availability: In stock
£49.60 Inc. VAT

In the trade? Apply for a
trade account for big discounts



Brand Water Gem
Filter Type GAC
Use Taste & Odour Reduction, Scale Control
Scale Inhibitor Yes
Capacity 2,500 litres
Filter / Cartridge Lifetime Up to 2,500 litres or 6 months, which ever comes first (per filter).
Min. Water Temp 1°C / 34°F
Max. Water Temp 23°C / 74°F
Min. Working Pressure 0.5 bar / 7.5 psi
Max. Working Pressure 8.75 bar / 125 psi
Flow Rate 4.0 lpm / 1.05 gpm (US Gallons)
Inlet / Outlet Size 3/8” Spigot
Overall Dimensions METRIC

Single Filter - 315mm (h) x 50mm (dia)


Single Filter - 12.40" (h) x 1.97" (dia)

Approvals & Certifications WRAS Approved

Data Sheets

Product Description

Changing filters is exceedingly simple thanks to John Guest push-fit fittings supplied with the original Water Gem system (see installation instructions). Cartridges can also be retro-fitted to existing under-sink systems, including those utilising 3-way taps.

Each filter contains granular activated carbon (GAC) to reduce chlorine taste and odour and also have a built-in advanced polyphosphate to inhibit scale, which improves appliance life in hard water areas.

Buying genuine replacement filters guarantees the same great tasting water as when the Water Gem system was first installed.

Filters have a lifetime of up to 6 months / 2,500 litres, which ever comes first.