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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💧 Pure water, zero hassle—filter like a pro!

BULK 4 PACK VALUE - Keep your system running longer with four premium replacement filters
HEALTH FIRST PURITY - Eliminates 99.99% of sediment, cysts, and bacteria for safe hydration
TASTE ENHANCING QUALITY - Preserves and improves natural water flavor, making every sip refreshing
GRAVITY POWERED CONVENIENCE - No plumbing or electricity required—pure water anywhere, anytime
ULTRA FINE CERAMIC FILTRATION - Blocks particles as small as 0.5 microns for pristine water clarity

The Doulton W9121214/British Berkefeld W9121215 Super Sterasyl Ceramic Water Filter offers ultra-fine 0.5 micron filtration that removes 99.99% of sediment, cysts, and bacteria. Designed for gravity water systems, it requires no plumbing, making it ideal for easy, on-demand access to clean, great-tasting water. This 4-pack ensures long-term use and consistent water quality for health-conscious professionals.

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