The USWF Fluoride Reduction Element is a specialty replacement filter designed by US Water Filters (USWF) to reduce fluoride in drinking water when used inside countertop gravity filter systems. It features a threaded stem design that is compatible with Berkey-style gravity filter housings, including Big Berkey, Royal Berkey, Imperial Berkey, Crown Berkey, Travel Berkey, and other gravity filters that accept standard PF-2 style fluoride reduction elements. Each system requires one USWF fluoride element paired with each black gravity carbon element.

Each USWF Fluoride Reduction Element has a filtration life of approximately 1,000 gallons per pair, or about 12 months of typical household use, whichever comes first. When used in pairs (two elements), the combined capacity is up to 1,000 gallons before replacement is recommended. Replacement timing may vary depending on source water quality and daily usage volume. Replacing on schedule ensures consistent fluoride and arsenic reduction performance.

The USWF Fluoride Reduction Element uses activated alumina media to specifically target and reduce fluoride and arsenic (both Arsenic III and Arsenic V) from drinking water. It is designed as a post-filter that works in conjunction with the primary black carbon gravity elements in your system, which handle chlorine, sediment, heavy metals, and other contaminants. The two-stage combination delivers comprehensive filtration for gravity-fed countertop systems.

To install, first prime each new USWF fluoride element by holding it under a faucet and flushing water through it for 15–30 seconds to remove loose media fines. Then attach the element to the threaded stem of a primed black carbon gravity element in the lower chamber of your gravity filter system, with the USWF element hanging down into the lower chamber. Discard the first full batch of filtered water after installation. USWF elements should always be installed in pairs, one per black carbon element.

Yes. Once the USWF Fluoride Reduction Element has been wet, it should remain wet for the duration of its service life. If the system will not be used for more than 3 days, it is recommended to remove the elements and store them in a sealed bag in the refrigerator to prevent bacterial growth. Allowing the activated alumina media to fully dry out after use can reduce its fluoride adsorption capacity and overall filter life.