Can these filters be used in other systems like propur, or Alexapur?

I would think that any of those gravity filters would fit the length may be the only problem

How long do these filters last?

These filters last a long long time. Every month or so, i will clean the outside of the filter. Good as new.

what is the filter's exact diameter? 2 inches or 2 3/4 inches? 4.5 inches is not realistic

The ceramic portion is actually close to 1 3/4 inches and the black plastic portion is just about 2 inches. hope this helps!

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💧 Elevate your hydration game with heritage-grade purity!

SEAMLESS COMPATIBILITY - Fits all British Berkefeld and major gravity filter cans—easy upgrade for your existing system.
CERTIFIED PEACE OF MIND - NSF certified and rigorously tested to meet the highest filtration standards—change every 6 months for peak performance.
HERITAGE YOU CAN RELY ON - Crafted in the UK with over two centuries of expertise, ensuring unmatched quality and durability.
TRUSTED FILTRATION POWER - Eliminates 99.99% of harmful contaminants while preserving essential minerals for healthy water.
PURE TASTE ZERO COMPROMISE - Transforms tap water into fresh, delicious hydration by removing chlorine, lead, PFAS, and more.

The British Berkefeld 7" Ultra Sterasyl Ceramic Gravity Filter Cartridge is a premium, NSF-certified ceramic filter that removes 99.99% of contaminants including bacteria, chlorine, lead, and PFAS, while retaining healthy minerals. Compatible with all British Berkefeld and major gravity filter cans, this 4-pack offers reliable, great-tasting water backed by over 200 years of British craftsmanship and rigorous quality testing.

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Brand	DOULTON
Model Number	W9121226x4
Colour	White
Product Dimensions	5 x 5 x 27 cm; 1.07 kg
Material	Ceramic
Compatible Models	DOULTON-W9121214, W9121214
Item Weight	1.07 kg

British Berkefeld 7" Ultra Sterasyl Ceramic Gravity Filter Cartridge |4 Pack| Reduces Contaminants | Suitable for All Gravity Cans | Improves Taste & Odour | NSF Certified Candle Element

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