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20 X 4.5 Pleated Cellulose Replacement Filter by Tier1 (20 micron)

Price $23.99 List Price Price $33.99 Save 29%
Availability: In Stock
Fits most stand housings built for 20-inch x 4.5 inch filter cartridges
Choose a quantity
  • 1Filter$23.99 
  • 3Filters Price $22.57 each
  • 6Filters Price $21.59 each
  • Ships fast!
  • Designed compatibility with the Pentek S1-20BB
  • Pleated Cellulose filter media is made from natural materials
  • For best performance, replace every 6 months or 24,000 gallons
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20 X 4.5 Pleated Cellulose Replacement Filter by Tier1 (20 micron) is available to buy in increments of 1

Tier1 S20-20 Filter Advantages

The Pentek S1-20BB comparable by Tier1 is a 20 x 4.5 inch whole house water filter for residential applications that require reduction of dirt, silt, sediment, rust, and scale. Pleated Cellulose filter media headlines this 20 micron replacement filter that will meet your filtering challenges head on. Cellulose filtering media is made from natural sources such wood pulp fiber. Install this whole house cartridge to receive filtered water to every room in your home. with easy replacement steps, exchanging your filter is simple and hassle free. Order your replacement S20-20 pleated cellulose filter today!

Pleated Filter Design

The Tier1 S20-20 uses pleated filter design to maximize contaminant exposure to filter media. More time along the media allows for higher capture and retention of unwanted contaminants. This also allows for greater amounts of larger particles of sediment and sand to collect within the pleats of the filter. This pleated design enhances structural stability and helps increase the performance of the filter.

Standardized Sized Filter

The 20 X 4.5 pleated cellulose replacement filter by Tier1 is built to fit 20-inch x 4.5-inch filter housings. This standard sizing allows this filter to easily replace existing styles of whole house filters for housings requiring 20 x 4.5 inch filters. The S20-20 goes to work immediately providing cleaner, fresher water for up to six months. Enjoy cleaner better water with your whole house replacement filter today.

NOTE: Cellulose filters are intended for municipal/city water applications. It is not recommended to use these filters for well water situations.

Package Qty1
Used In BrandsPentek, Tier1
Manufacturer's IdS20-20
Advertised Size (in)20 x 4-1/2
Actual Size (in)20 inches (length) x 4 1/2 inches (outside diameter)
Actual Size (cm)50.8 x 11.43
MediaPleated Cellulose
Primary Filter MediaPleated Cellulose
Filter Life (gallons)24,000
Filter Life (liters)90,849.84
Filter Life (months)6 months
Micron Rating (Nominal)20
Operating Temperature (°F)40 - 145
Operating Temperature (°C)4.4 - 62.8
Flow Rate (gpm)10
Flow Rate (lpm)37.854
ColorBlue / White
Warranty GuaranteeUnconditional Product Guarantee for Life of the Product
IncludesOne 20 X 4.5 Inch 20 Micron Pleated Cellulose Replacement Filter by Tier1
Primary Filter MediaPleated Cellulose

Reduced Contaminants

The TIER1-S20-20 reduces the following contaminants:

  • Dirt
  • Particles
  • Sand
  • Sediment
  • Silt

The TIER1-S20-20 is comparable with the following part numbers

American Plumber W20CLHD20


  1. Turn off water supply. Press red pressure-relief button (if present).
  2. Unscrew housing. Remove large o-ring, wipe clean and set aside.
  3. Discard used filter cartridge. Wash housing with dish soap and warm water using a nonabrasive sponge or cloth. Rinse thoroughly. Fill 1/3 with water. Add about 1 tablespoon of bleach and scrub to disinfect. Rinse thoroughly.
  4. Lubricate o-ring with clean silicone grease. Change o-ring if any damage cuts or degradation are present. Insert o-ring in groove.
  5. Insert new filter cartridge.
  6. Screw housing onto the cap and hand-tighten. Do not over tighten. Make sure cap standpipe slips into cartridge.
  7. Turn on water supply. Press pressure-relief button (if present). Check for leaks before leaving installation.

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