Amazon BasicsAmazon Basics Filter Cartridges, 3-pack4.5 ★ · 16,236 RezensionenCheck the price on Amazon
Klar WaterKlar Water Replacement Cartridge, Klar jugs4.6 ★ · 1,245 RezensionenCheck the price on Amazon
Aqua OptimaAqua Optima Evolve+ Cartridges, 12-pack4.6 ★ · 8,221 RezensionenCheck the price on Amazon
InSinkEratorInSinkErator F-701R Under-Sink Filter, 2-pack4.7 ★ · 1,057 RezensionenCheck the price on Amazon
BTRSOLUSBTRSOLUS Brita-Compatible Cartridges, 6-pack4.5 ★ · 265 RezensionenCheck the price on Amazon
ZeroWaterZeroWater 5-Stage Replacement Filter, 4-pack4.4 ★ · 94,978 RezensionenCheck the price on Amazon* Alle Preise inkl. MwSt. · Stand 22 July 2026. Der Preis kann seit der letzten Aktualisierung gestiegen sein; eine Echtzeit-Aktualisierung ist technisch nicht möglich. Maßgeblich ist der auf amazon.de zum Kaufzeitpunkt angezeigte Preis.
Kaufhilfe
What matters when buying
What one cartridge costs
A cartridge is a consumable, so the only comparable number is the price of one. In this top ten that runs from £2.50 in a twelve-pack to £39 for an under-sink filter sold in twos. Headline prices between £11 and £78 tell you almost nothing until you have divided.
Jug, tap or under-sink
Amazon files three incompatible fittings in this one node. A MAXTRA-shaped jug cartridge, a BRITA P1000 for an on-tap system and an InSinkErator F-701R for a plumbed hot water tap all appear here, and none of them will go in the wrong housing. Check the fitting before the price.
Original or compatible
Half of this list is third-party refills sold as fitting Brita jugs — note the asterisks and the wording, because Maxtra and MAXTRA PRO are not the same shape. The original twelve-pack works out at £3.90 a cartridge against £2.50 for the compatibles, which is what the guaranteed fit costs.
Litres, not weeks
Four weeks is a guess about your household; litres is a measurement. Only two listings here state one — 250 litres for the Aquaphor and 454 litres for the under-sink filter. A family that drinks and cooks with filtered water will get through a jug cartridge long before the calendar says so.
What it claims to reduce
Standard carbon refills are sold against limescale and chlorine — taste and kettle scale. The ZeroWater is an ion-exchange filter sold against lead and PFOA/PFOS, the Klar against fluoride. If you are buying for a specific contaminant rather than for taste, that difference is the whole purchase.
Bulk buying and price swings
A twelve-pack is the cheapest per cartridge but commits you to about a year of one system. Prices here moved between −31% and +13% during the observed period, so a bulk box locks in a price that may or may not look clever in six months.
How the score is calculated — and what it is not
Der Passungs-Score (0–10) ist der nach deinem Bedarf gewichtete Schnitt aus sieben Kriterien — kein eigener Labortest.
The score is not our own hands-on test. It is calculated transparently from public Amazon data: 75% from the average star rating and 25% from the number of reviews, weighted logarithmically. The ranking order itself comes from estimated monthly revenue per ASIN. Prices, ratings and review counts were retrieved from Amazon.co.uk on 22 July 2026 and can change at any time.
- Anwendungs-Passung — wie gut das Modell zu deinem konkreten Einsatz passt.
- Wertigkeit — Material, Verarbeitung und Langlebigkeit.
- Nutzen & Funktion — Ausstattung und praktischer Mehrwert im Alltag.
- Bewährung — Marktbewährung über den Kategorie-Rang, ergänzt um den Sterne-Schnitt.
- Preis-Leistung — Qualität pro Euro, innerhalb dieser Nische normiert.
- Service & Sicherheit — Garantie, Ersatzteile, Zertifikate und Schadstofffreiheit.
- Nachhaltigkeit — Reparierbarkeit, Ersatzteil-Verfügbarkeit und Materialwahl.