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20 X 2.5 Carbon Block Replacement Filter by Tier1 (5 micron)

Price $20.99 List Price Price $29.99 Save 30%
Availability: In Stock
Fits most stand housings built for 20-inch x 2.5 inch filter cartridges
Choose a quantity
  • 1Filter$20.99 
  • 3Filters Price $19.75 each
  • 6Filters Price $18.89 each
Available Add-Ons

SKU: TIER1-OR-LUBRICANT-SM › See more product details

O-Ring Silicone Grease (0.2 oz Packet)

Add: $6.99 $4.99

SKU: TIER1-OR-34 › See more product details

American Plumber, Culligan, Pentek OR-34 O-Ring

Add: $9.99 $6.99
  • Ships fast!
  • Reduces impurities down to 5 micron
  • Drop-in cartridge changes are quick and easy
  • Carbon media to reduces chlorine taste, odor and more
› See more product details
  • Ships fast!
  • Reduces impurities down to 5 micron
  • Drop-in cartridge changes are quick and easy
  • Carbon media to reduces chlorine taste, odor and more

Tier1 EP5-20 Filter Advantages

The Pentek EP-20 comparable whole house carbon block water filter by Tier1 reduces chlorine taste and odor from your drinking water. Manufactured for use in housings that accept standard 20-inch x 2.5-inch water filter cartridges. This filter provides great tasting carbon filtered water throughout your entire home. Tier1 water filters are designed for performance, but priced for value. Don't pay exorbitant OEM filter prices, buy Tier1 for the quality and pricing you deserve. Order the Tier1 Pentek EP-20 comparable whole house carbon block water filter today.

Carbon Filter Media

Carbon media, whether as granular activated carbon or as a carbon block functions as a fantastic water filtration media due to its incredibly high porosity. This high porosity maximizes the surface area contaminants are exposed to and ensures that contaminants have a great chance of being captured and reduced from your drinking water. Carbon filters are known for being effective at reducing the unpleasant taste and odors associated with city water chlorine treatment. If you are looking for better tasting water with excellent contaminant reduction try out a carbon filter today!

Universal Filter Sizing

The 20 X 2.5 Tier1 EP5-20 carbon block replacement filter is built to fit 20-inch x 2.5-inch filter housings. This standard sizing allows this filter to easily replace existing styles of whole house filters for housings requiring this size filter. The EP5-20 goes to work immediately providing cleaner, fresher water for up to six months or 12,000 gallons, depending on water quality and use. Enjoy cleaner better water with your whole house replacement filter today.

Package Qty1
Used In BrandsPentek, Tier1
Manufacturer's IdEP5-20
Advertised Size (in)20 x 2-1/2
Actual Size (in)19 7/8 inches (length) x 2 1/2 inches (outside diameter)
Actual Size (cm)50.4825 x 6.35
Outside Diameter (inches)2.5
MediaPowder Activated Carbon Block
Primary Filter MediaActivated Carbon Block
Filter Life (gallons)12,000
Filter Life (months)6 months
Micron Rating (Nominal)5
Operating Temperature (°F)40 - 180
Operating Temperature (°C)4.4 - 82.2
Flow Rate (gpm)2
Country of ManufactureChina
Warranty GuaranteeUnconditional Product Guarantee for Life of the Product
IncludesOne 20 x 2.5 Inch Carbon Block Replacement Filter by Tier1
Primary Filter MediaActivated Carbon Block

Reduced Contaminants

The TIER1-EP5-20 reduces the following contaminants:

  • Bad Taste and Odor
  • Chlorine Taste & Odor
  • Particulates
  • Sand
  • Sediment
  • Silt

The TIER1-EP5-20 is comparable with the following part numbers


The TIER1-EP5-20 fits the following model numbers



  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.