The Tier1 US-UF-100-CBRF is a complete 4-stage replacement filter set designed for the US-UF-100 Ultra Filtration Hollow Fiber Drinking Water System. Unlike standard reverse osmosis systems, this ultrafiltration (UF) system uses a hollow fiber membrane with a 0.01 micron rating to reduce contaminants while retaining beneficial minerals in your drinking water. The 4-stage set includes a sediment pre-filter, carbon block filter, hollow fiber UF membrane, and a post-carbon polishing filter for crisp, great-tasting water without the need for electricity or a storage tank.

With its 0.01 micron hollow fiber ultrafiltration membrane and dual carbon block stages, the US-UF-100-CBRF reduces chlorine, taste and odor, sediment, rust particles, cysts, bacteria, VOCs, and other fine particulates. The tight 0.01 micron pore structure blocks microscopic impurities that standard carbon-only systems cannot capture, while preserving naturally occurring minerals like calcium and magnesium that are typically stripped out by RO systems.

For optimal performance, replace the sediment, pre-carbon, and post-carbon stages every 6 to 12 months depending on your water usage and incoming water quality. The hollow fiber ultrafiltration membrane has an extended service life of approximately 24 months or up to 2,000 gallons. Replacing the US-UF-100-CBRF set on schedule ensures consistent flow rate, filtration efficiency, and prevents pressure drop in your drinking water system.

The US-UF-100-CBRF replacement set is engineered specifically to fit the Tier1 US-UF-100 4-Stage Ultra Filtration Hollow Fiber Drinking Water System. The quick-connect fittings and housing dimensions are matched to this system for a leak-free installation. It is not designed as a universal replacement — verify that you own the US-UF-100 housing before ordering to ensure proper fitment.

Turn off the feed water supply and depressurize the system before removing the old cartridges. Install each stage in the correct order (sediment, carbon block, UF hollow fiber membrane, post-carbon), then turn the water back on and check for leaks. Flush the system by running water through the dedicated faucet for 5 to 10 minutes to clear any carbon fines and air from the new cartridges. After flushing, your US-UF-100-CBRF set will deliver clean, mineral-retaining drinking water at full capacity.