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20 X 4.5 Granular Activated Carbon Replacement Filter by Tier1 (10 micron)

Price $140.99 List Price Price $200.99 Save 29%
Availability: In Stock - Free Shipping
Fits most stand housings built for 20-inch x 4.5 inch filter cartridges
  • Supports a flow rate up to 4 gallons per minute (gpm)
  • Lasts for up to 6 months, depending on use and water quality
  • Provides great tasting, more refreshing water throughout your home
  • KDF media effectively reduces heavy metals and bacteria in your water
See more product details

Tier1 KDF85-20BB Filter Advantages

The Aries F-20-2215 Comparable Whole House Water Filter by Tier1 contains KDF-85. This filter reduces chlorine taste and odor, water-soluble heavy metals, and controls scale, bacteria, and algae in your water. KDF is a patented medium that consists of high purity copper-zinc granules that use redox (exchange of electrons) to effectively reduce chlorine and heavy metals as well as controlling microorganisms in potable water. The Tier1 KDF85-20BB-WF Water Filter is 20-inch L x 4.5-inch W. The filter can be used in all number 20 Big Blue or number 20 Big Boy housings.

Scale Reduction Importance

Scale build up is caused by minerals in your water bonding to one another and creating clusters which can negatively affect water flow, water using appliances, and the effectiveness of soaps and detergents. By exchanging electrons with some of these minerals your cartridge will help reduce this build up and help improve your water quality. If you are in need of heavy scale reduction and have high levels calcium and magnesium in your water you may want to check out a whole home water softening system such as the Tier1 48,000 Grain Water Softener

Standardized Filter Sizing

The 20 X 4.5 inch KDF and granular activated carbon 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 ECP5-20 goes to work immediately providing cleaner, fresher water for up to six months. Enjoy cleaner better water with your whole house replacement filter today.

Package Qty1
Manufacturer's IdKDF85-20BB
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
MediaKDF 85 with Granular Activated Carbon
Primary Filter MediaGranular Activated Carbon
Filter Life (months)6 months
Micron Rating (Nominal)10
Flow Rate (gpm)4
Flow Rate (lpm)15.141
Warranty GuaranteeUnconditional Product Guarantee for Life of the Product
IncludesOne 20 X 4.5 Inch Granular Activated Carbon Replacement Filter by Tier1
Primary Filter MediaKDF 85 Media

Reduced Contaminants

The TIER1-KDF85-20BB reduces the following contaminants:

  • Algae
  • Chlorine Taste & Odor
  • Hard Scale
  • Heavy Metals


  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. NOTE: This step is important to ensure a proper housing seal. Make certain the o-ring is seated level in the groove
  7. Insert new filter cartridge
  8. Screw housing onto the cap and hand-tighten. Do not over tighten. Make sure cap standpipe slips into cartridge
  9. Turn on water supply. Press pressure-relief button (if present). Check for leaks before leaving installation