Save with Auto-Ship

Get the product you need, exactly when you need it, delivered right to your door. No more searching for the right part number, we've got you covered. Plus, you'll save $$ on every order and shipping is on us. Learn more

Save Money

Free Shipping*

Choose Frequency

*Free Shipping available in the contiguous US

4-Stage Tier1 Ultra-Filtration Hollow Fiber Water Filter System

Price $138.99 List Price Price $198.99 Save 30%
Availability: In Stock - Free Shipping
Installs directly onto the cold water supply
  • Includes a sleek, NSF certified designer faucet in chrome color
  • Features Tier1's innovative twist and lock filter change design
  • Provides great tasting filtered water
  • Installs simply into cold water supply line, does not require very much maintenance
See more product details
The Tier1 4-Stage Ultra-Filtration Hollow Fiber Drinking Water Filter System is a four stage under-sink filtration system. The stages are sequenced to filter particles down by size so that they all together increase the longevity of the filtration system and each of the other replacement filters. The sequence is as follows, (stage 1) a 5 micron sediment pre-filter, (stage 2) carbon block pre-filter, (stage 3) a 1 micron sediment filter, and (stage 4) a hollow fiber ultrafiltration membrane post-filter. The system features our innovative twist and lock filter change design to make filter changes easier than ever. The sediment filters should be replaced every 3 months, the carbon filter every 6 months, and the ultrafiltration membrane every twelve months. Featuring a slim, compact design this filter installs easily under the sink and doesn't take up much space. Allowing for you to keep your usual items underneath the sink with ease. This system also comes with a stylish chrome faucet to dispense the filtered water. Enjoy the clean crisp taste of filtered water with the Tier1 4-Stage Ultra-Filtration Hollow Fiber Drinking Water Filter System today!

Experience the Tier1 Difference

Tier1 manufactures high-quality filtration and household products. We take creating and maintaining a healthy home seriously. Products must undergo rigorous testing and meet demanding quality expectations in order to earn the Tier1 badge. Every purchase is backed by the Tier1® Guarantee:

  • Guaranteed Fit
  • Guaranteed Quality
  • Guaranteed Price
Package Qty1
Manufacturer's IdUS-UF-100
Actual Size (in)13 inches (length) x 12 inches (width) x 3 inches (depth)
Actual Size (cm)33.02 x 30.48 x 7.62
Filter Life (gallons)1,500
Filter Life (liters)5678.11
Operating Pressure (psi)5 - 120
Operating Temperature (°F)40 - 100
Operating Temperature (°C)5 - 37.8
Flow Rate (gpm)0.5
Flow Rate (lpm)1.89
Fitting TypeQuick-Change
ColorWhite / Chrome
Warranty GuaranteeUnconditional Guarantee for Life of the Product
IncludesFilter set, Faucet (chrome), Mounting Bracket, Tubing, Installation Hardware

Reduced Contaminants

The TIER1-US-UF-100 reduces the following contaminants:

  • 1,2-Dichlorobenzene / O-Dichlorobenzene (ODCB)
  • Acanthamoeba
  • Alachlor
  • Benzene
  • Carbon Tetrachloride
  • Chlorine Taste & Odor
  • Chloropicrin
  • Cryptosporidium
  • Dibromochloropropane (DBCP)
  • Dinoseb
  • E. Coli
  • Ethylbenzene
  • Ethylene Dibromide (EDP) / 1,2-Dibromoethane
  • Giardia
  • Heptachlor Epoxide
  • Hexachlorobutadiene
  • Lindane
  • O-Dichlorobenzene
  • P-Dichlorobenzene
  • Salmonella
  • Sand
  • Sediment
  • Shigella
  • Silt
  • Staphylococcus Aureus
  • Styrene
  • Tetrachloroethylene / Perchloroethylene (PERC)
  • Toluene
  • Total Trihalomethanes (TTHM)
  • Trichloroethylene
  • Vibrio Cholerae

The TIER1-US-UF-100 is comparable with the following part numbers


User Guide


  1. Install system near water source
  2. Turn off cold water supply
  3. Disconnect sink faucet cold water line from feed water source
  4. Install slip joint adapter (included) on to the cold water line
  5. Reconnect sink faucet to water line by connecting to the slip joint adapter (included)
  6. Connect ball valve adapter (included) to the feed water connection by connecting to the slip joint adapter (included)
  7. Attach flexible water supply hose (included) from ball valve adapter (included to filtration unit)
  8. Drill hole in sink for drinking water faucet (smooth any rough edges with file)
  9. Insert drinking water faucet into hole, secure with fittings (included)
  10. Connect flexible water supply hose (included) from filtration system to drinking water faucet

Reset Instructions