The bottom line The filter you can verify and the easiest to install without tools or a drill. Its flow figure lacks the pressure that the rival listing supplies.
What you are getting
An under-sink water filter with an enlarged filter area, IAPMO certification searchable as WD-UL12A, compliance stated with NSF/ANSI 42 and 372, a stated capacity of up to 11 000 gallons or 12 months, a flow of 5.026 l/min, drill-free wall mounting with a twist lock and suction base, a 3/8 in line with a 1/2 in converter, and a filter-life indicator.
The certification you can actually check
“Search IAPMO for WD-UL12A.”
That single sentence is worth more than every “premium filtration” in this catalogue. Certification claimed is unverifiable; certification with a certifying body and a searchable model code takes two minutes to confirm before you buy.
No drilling
A twist-lock wall mount and a suction base, stated as saving a third of the installation time. In a rented kitchen — or any cupboard whose back panel you would rather not put a screw through — that is the difference between fitting it and not.
The indicator that beeps
A filter nobody changes is a filter that has stopped working and started harbouring what it caught. A red light and an audible reminder is a small piece of engineering aimed at the actual failure mode of this product category.
Two things stated honestly
It does not reduce TDS. Volunteered by the maker, in its own bullet points.
Third-party laboratory tested. Named as such rather than implied.
The figure that is half a figure
5.026 l/min, with no pressure attached. The filter beside this one in the hub publishes “over 7.57 l/min at 40 psi” — same kind of claim, one of them checkable.
Availability
On sale at around 75 € on the German, French, Italian and Spanish Amazon stores at the time of checking.
Also on sale on the British Amazon store, in the local currency: the range above is measured on the euro stores only.
Listed but with no offer on the American Amazon store — the reference exists there and nobody is currently selling it.
Prices and availability are what Keepa reported on the date this page was updated; both move.
Prices quoted in this text were read on 5 September 2026. The live price is at the top of the page.
What we like, and what we don't
Strengths
Names a certification that can be independently checked — IAPMO, searchable by the model code WD-UL12A
A filter-life indicator that lights and beeps, so the cartridge is changed on time rather than remembered
Drill-free wall mounting with a twist lock and a suction base, stated to save a third of the installation time
Compromises
The 5.026 l/min flow figure carries no reference pressure, unlike the filter beside it in this hub
Capacity is published in US gallons, which needs converting against a European water bill
No dimensions published, on a unit that has to fit in a cupboard already holding a trap and a waste
Specifications
Filter type
Single-cartridge under-sink filter with an enlarged filter area, stated as giving twenty times the dirt-holding capacity
Stated capacity
Up to 11 000 gallons (about 41 600 litres) or 12 months — stated
Declared reductions
The maker states reductions of PFAS, PFOA and PFOS, rust, lead, chlorine, heavy metals, chemical contaminants and sand, with improved taste and odour, tested by a third-party laboratory — and states that it does NOT reduce TDS
Connection size
A 3/8 in line supplied with a 3/8 in to 1/2 in converter — stated as compatible with European sink valves
Stated flow rate
5.026 litres per minute — stated; no reference pressure is given
Cartridge
Twist-lock change, with a built-in indicator that turns red and beeps when replacement is due — stated
Amazon reference
B0FB94G6M1 (same reference on 6 Amazon marketplaces)
EAN
6922350645424
Questions people actually ask
Why does a searchable certification matter?
Because "certified" on its own is unverifiable. This listing names IAPMO and gives the exact model code to search — WD-UL12A. That turns a marketing word into something you can check in two minutes before ordering, which almost no filter listing allows.
Is 11 000 gallons a long life?
About 41 600 litres. At a family's drinking and cooking use that is well over a year, which is why the maker states a 12-month life alongside it — the calendar runs out before the capacity does for most households.
Reverse osmosis · seven stages · 75 GPD membrane, up to 270 litres a day · separation to 0.0001 µm stated · 12-litre storage tank · remineralisation with calcium and magnesium · improved waste ratio, unquantified
The only reverse osmosis system here — the one technology that genuinely lowers TDS — with a remineralisation stage to put minerals back afterwards.
Best for: A household that wants dissolved solids genuinely reduced, with cupboard room for a tank and a tolerance for waste water.
Inline filter · three stages: 0.5 µm sediment, carbon block, limescale crystallisation stable to 200 °C · up to 3 500 litres or about 6 months · fits between the cold line and your existing tap · only the medium is replaced
An inline filter that needs no second tap and no new hole in the worktop — it goes between your cold supply and the tap you already have.
Best for: A kitchen where limescale on the kettle and the coffee machine is the problem, and where a second tap is not an option.
Under-sink filter · two-stage 0.5 µm · NSF/ANSI 42 and 53 certified · over 7.57 l/min at 40 psi stated · fits 1/2 in and 3/8 in cold lines · shut-off built into the cap · does NOT reduce TDS, stated
The only filter in this catalogue that publishes a flow rate with the pressure behind it, cites two NSF/ANSI standards, and states in its own listing what it does not do.
Best for: A kitchen with cupboard space, where the specification should be checkable against a named standard.
