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Tier1 Smart Tap Under-Sink Water Filtration System Replacement Filter Cartridge

Fits TIER1-US-ST04 under-sink system
Save 18% (MSRP: $66.99)
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Tier1 Smart Tap Under-Sink Water Filtration System Replacement Filter Cartridge

Tier1 Smart Tap Under-Sink Water Filtration System Replacement Filter Cartridge

Save 18% (MSRP: $66.99)



The US-ST04-R Tier1 Smart Tap under-sink water filter replacement cartridge is a high performance under-sink filter capable of filtering over 50 contaminants in your water. This replacement filter connects easily to the US-ST04 system it replaces the used cartridge of. Easy installation requires no tools for replacement and provides a hassle free filter exchange. The US-ST04-R reduces a wide array of contaminants and provides clear, crisp, and refreshing water in every glass. Order your replacement filter today!

Key Features

  • This filter has been tested against NSF/ANSI Standard 42, 53, an 401
  • Reduces Chlorine Taste and Odor, Lead, Mercury, and more!
  • Requires less space than most other under-sink water filtration systems
  • Features quick and easy installation

Contaminants Controlled



Manufacturer's Id US-ST04-R UPC 641945752366
Actual Size (in) 16.25 inches (length) x 4.125 inches (width) x 4.5 inches (depth) Primary Filter Media Carbon 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 Size (inches) 3/8 inch Color / Finish Gray
Chlorine Tolerance 95.5% Certifications NSF/ANSI Standard 42, NSF/ANSI Standard 53, NSF/ANSI Standard 401
Includes Smart tap replacement filter cartridge Primary Filter Media Carbon Block


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


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