These fluoride filters appear to not have a stem. How do they attach?

They actually attach to the thread on the carbon filter. They sit in the water that’s already filtered through the tank. So you’d put the carbon filter in first then with 8 (they’re very specific about this 8 turns only business) turns you attach the fluoride filter and you’re ready to go. Hope this helps and if not there are a few videos online offering more detailed instructions and visuals.

How long should these last?

Truly it depends on your water and how much you use it. We (family of 3) generally go through roughly a gallon a day of water. We have 4 of these in our big berkey and we probably replace them at two years, give or take 6 months. We wash the unit and let all filters dry out ever 3 months or so. Technically speaking they're supposed to be replaced after 1000 gallons (per filter).

Will this filter chlorine?

Yes. That's the primary reason we use it.

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BerkeyAuthentic Berkey PF-2 Fluoride and Arsenic Reduction Elements (Set of 4 Elements

BerkeyAuthentic Berkey PF-2 Fluoride and Arsenic Reduction Elements (Set of 4 Elements

Product ID: 255741870

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Details

Material
Carbon Fiber
Product dimensions
19.3D x 26.2W
Item weight
1.01 Pounds
External testing certification
Accredited
Product benefits
Fluoride and

💧1,000 gallons filtration capacity

⚙️Compatible with all Berkey gravity systems

🛡️Advanced fluoride & arsenic reduction

Description

💧 Elevate your hydration game with Berkey’s elite fluoride & arsenic shield!

HEAVY METAL DEFENSE - Specifically engineered to reduce fluoride, arsenic(V), arsenic(III), and other harmful metals.
UNIVERSAL BERKEY FIT - Seamlessly integrates with Big Berkey, Crown, Royal, Travel & more for ultimate versatility.
PURE WATER EVERY DROP - Filters up to 1,000 gallons before replacement—long-lasting clean hydration.
EFFORTLESS INSTALLATION - Attaches easily to Black Berkey Elements—no tools, no hassle, just pure water.
TRUSTED CARBON FIBER TECH - Durable carbon fiber construction ensures consistent, high-performance filtration.

The Berkey PF-2 Fluoride and Arsenic Reduction Elements (Set of 4) are premium replacement filters designed to work with all Berkey gravity-fed water systems. Engineered with advanced carbon fiber technology, these elements effectively reduce fluoride, arsenic(V), arsenic(III), and other heavy metals, providing up to 1,000 gallons of purified water per element. Easy to install and compatible across multiple Berkey models, they ensure long-lasting, safe hydration for health-conscious professionals.

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