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20 X 4.5 Carbon Block Replacement Filter by Tier1 (5 micron)

Price $39.99 List Price Price $56.99 Save 29%
Availability: In Stock
Fits most stand housings built for 20-inch x 4.5 inch filter cartridges
Choose a quantity
  • 1Filter$39.99 
  • 3Filters Price $37.63 each
  • 6Filters Price $35.99 each
Available Add-Ons

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

Dow Corning Molykote 111 O-Ring Silicone Lubricant (5.3 oz. Tube)

Add: $39.99 $27.99

SKU: TIER1-OR-100 › See more product details

American Plumber, Culligan, Pentek OR-100 O-Ring for Big Blue Housings

Add: $9.99 $6.99
  • Ships fast!
  • Ideal for under sink or point-of-use filtration
  • Reduces contaminants down to 5 microns in size
  • Standardized sizing allows for a wade array of housing options
› See more product details
  • Ships fast!
  • Ideal for under sink or point-of-use filtration
  • Reduces contaminants down to 5 microns in size
  • Standardized sizing allows for a wade array of housing options

TIER1-EP5-20BB Filter Advantages

The Pentek EP-20BB comparable whole house carbon block water filter by Tier1 reduces chlorine taste and odor in your drinking water. The Tier1 EP5-20BB filters contaminants down to 5 microns and reduces contaminants including dirt, sediment, sand, silt, and chlorine taste and odor. Carbon block filter media ensures that you receive better tasting clearer water in every glass. Affordably priced and compatible with a wide array of filters and housings Tier1 provides a necessary filter for a great value. Order your replacement filters today!

Universal Filter Sizing

The 20 X 4.5 carbon block 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 EP5-20BB 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: A carbon cartridge may contain carbon fines (very fine black powder). After installation, flush cartridge for 10 minutes before using the water. It is recommended that you run the tap at least 20 seconds prior to using water for drinking or cooking purposes.

NOTE: Make certain installation complies with all state and local laws and regulations.

NOTE: After prolonged periods of non-use (such as during a vacation) it is recommended that the system be flushed thoroughly and/or filters are replaced. Let water run for 5-6 minutes before using.

Package Qty1
Used In Brands3M, Ametek, Aqua-Pure, Culligan, Pentek, Tier1
Manufacturer's IdEP5-20BB
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
Outside Diameter (inches)4.5
MediaCarbon Block
Primary Filter MediaActivated Carbon Block
Filter Life (months)6 months
Micron Rating (Nominal)5
Operating Temperature (°F)40 - 165
Operating Temperature (°C)4.4 - 73.9
Flow Rate (gpm)2
Flow Rate (lpm)7.57
Country of ManufactureSingapore
Warranty GuaranteeUnconditional Product Guarantee for Life of the Product
IncludesOne 20 X 4.5 Inch Carbon Block Replacement Filter by Tier1
Primary Filter MediaActivated Carbon Block

Reduced Contaminants

The TIER1-EP5-20BB reduces the following contaminants:

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

The TIER1-EP5-20BB is comparable with the following part 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.
  4. Fill 1/3 with water. Add about 1 tablespoon of bleach and scrub to disinfect. Rinse thoroughly.
  5. Lubricate o-ring with clean silicone grease. Change o-ring if any damage cuts or degradation are present. Insert o-ring in groove.
  6. Insert new filter cartridge.
  7. Screw housing onto the cap and hand-tighten. Do not over tighten. Make sure cap standpipe slips into cartridge.
  8. Turn on water supply. Press pressure-relief button (if present). Check for leaks before leaving installation.