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US-ST04 Tier1 Undersink Smart Tap System

SKU
TIER1-US-ST04
Price $58.99 List Price Price $84.99 Save 30%
Availability: Discontinued - Free Shipping
  • Reduces Chlorine Taste and Odor, Lead, Mercury, and more!
  • Easy installation!
  • Over 650 gallon filter capacity
  • Sleek, space-saving design
› See more product details
The Tier1 US-ST04 undersink system is the perfect addition to your kitchen sink, filtering over 50 contaminants potentially in your water. This easy-to-install system will give you clean, fresh, great-tasting water in no time at all! Simply mount the bracket and filter under your kitchen sink cabinet, hook it up to your cold water line with the water supply adapter (included), and away you go! The system has been tested against NSF standards 42, 53, and 401 for reduction of substances such as bad Chlorine taste and odor, Turbidity, Mercury, Lead, some pharmaceuticals, and more! There's no need to waste money and space on countertop systems and bottled water, Tier1 offers all the filtration you need with the Tier1 US-ST04 Undersink System. Order 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-ST04
UPC641945746853
Actual Size (in)19.25 inches (length) x 4.125 inches (width) x 4.5 inches (depth)
Actual Size (cm)50 centimeters (length) x 10.5 centimeters (width) x 11.5 centimeters (depth)
Primary Filter MediaCarbon Block
Filter Life (gallons)651
Filter Life (liters)2464
Micron Rating (Nominal)1
Operating Pressure (psi)40 - 120
Operating Temperature (°F)33 - 100
Operating Temperature (°C)4.4 - 37.8
Flow Rate (gpm)1.25
Flow Rate (lpm)4.73
Fitting TypeMPT
Fitting Size (inches)1/2 inch
ColorGray
Chlorine Tolerance95.5%
CertificationsNSF/ANSI Standard 42, NSF/ANSI Standard 53, NSF/ANSI Standard 401
IncludesSystem head with attachable bracket, smart tap filter, water supply adapter, mounting screws, 3/8 inch plastic tubing
Primary Filter MediaCarbon Block

Reduced Contaminants

The TIER1-US-ST04 reduces the following contaminants:

  • 1,1,1-Trichloroethane 95%
  • 1,1,2-Trichloroethane >99%
  • 1,1,1-Trichloro-2-propanone 96%
  • 1,2,4-Trichlorobenzene >99%
  • 1,1-Dichloroethtlene >99%
  • 1,1-Dichloro-2-propanone 99%
  • 1,2-Dichloroethane 95%
  • 1,2-Dichloropropane >99%
  • 2,4-Dichlorophenoxyacetic Acid (2,4-D) 99%
  • Alachlor >98%
  • Asbestos 99%
  • Atrazine >97%
  • Benzene >99%
  • Bisphenol A >98.9%
  • Bromochloroacetonitrile 98%
  • Bromodichloromethane 95%
  • Bromoform 95%
  • Carbofuran >99%
  • Carbon Tetrachloride 98%
  • Chloramines 89.1%
  • Chlorine Taste & Odor 89.1%
  • Chlorobenzene / Monochlorobenzene >99%
  • Chlorodibromomethane 95%
  • Chloroform 95%
  • Chloropicrin 99%
  • Cis-1,2-Dichloroethylene >99%
  • Cis-1,3-Dichloropropylene >99%
  • Cysts >99.99%
  • Dibromochloropropane (DBCP) >99%
  • Dibromoacetonitrile 98%
  • Dichloroacetonitrile 98%
  • Dinoseb 99%
  • Endrin 99%
  • Estrone >96.5%
  • Ethylbenzene >99%
  • Ethylene Dibromide (EDP) / 1,2-Dibromoethane >99%
  • Heptachlor (H-34,Heptox) >99%
  • Heptachlor Epoxide 98%
  • Hexachlorobutadiene >98%
  • Hexachlorocyclopentadiene >99%
  • Ibuprofen >95.4%
  • Lead at pH 6.5 >99.3%
  • Lead at pH 8.5 >99.4%
  • Lindane >99%
  • Mercury at pH 6.5 >96.6%
  • Mercury at pH 8.5 >96.7%
  • Methoxychlor >99%
  • Methyl tertiary butyl ether (MTBE) 66.9%
  • Naproxen >96.4%
  • Nonylphenol >97.5%
  • O-Dichlorobenzene >99%
  • P-Dichlorobenzene >98%
  • Particulates (Class I) >99.9%
  • Pentachlorophenol >99%
  • Pesticides >95.6%
  • Simazine >97%
  • Styrene >99%
  • Toluene >99%
  • Trans-1,2-Dichloroethylene >99%
  • Trichloroacetonitrile 98%
  • Trichloroethylene >99%
  • Turbidity 99.0%
  • VOCs 96.7%
  • Xylene >99%

The TIER1-US-ST04 is comparable with the following part numbers

TIER1-US-ST04 US-ST04
CULLIGAN-US-EZ-4 US-EZ-4
CULLIGAN-US-EZ-3 US-EZ-3

Installation Guide

Instructions

  1. Turn off cold water shut-off valve then turn on the kitchen faucet and allow water to drain from line.
  2. Disconnect the cold water line from the cold water shut-off valve
  3. Connect the water supply adapter to the cold water shut-off valve, as shown.
  4. For more filter changing assistance please watch our video below: