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BBF1-20MB Pentek Whole House Filter Replacement Cartridge

Price $139.99 List Price Price $199.99 Save 30%
Availability: In Stock - Free Shipping
Fits any standard housing that uses 20-inch x 4 1/2-inch filter cartridges
  • 99% Hydrogen conversion and 95% Hydroxide conversion
  • 1850 Grain capacity with 20-40 screen size (US Std. Mesh)
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The PENTEK-BBF1-20MB filter cartridge was developed to help meet requirements for deionized water. Manufactured with FDA-compliant resin these high-capacity, semi-conductor-grade resin cartridges are ideal for use in many industries where low levels of total organic carbon (TOC) and total dissolved solids (TDS) are required.
Package Qty1
Used In BrandsCuno, Filterite, Harmsco, Keystone, Pentek, U.S. Water, US Filter
Manufacturer's IdBBF1-20MB
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
MediaMixed Bed DI Resin
Primary Filter MediaIon Exchange Resin
Materials of ConstructionGasket: Buna-N
Filter Life (months)6 months
Micron Rating (Nominal)30
Operating Temperature (°F)40 - 100
Operating Temperature (°C)4.4 - 37.8
Flow Rate (gpm)1.25
Flow Rate (lpm)4.732
IncludesOne 20 x 4-1/2 Inch Pentek BBF1-20MB Mixed Bed Deionization Water Filter
Primary Filter MediaMixed Bed DI Resins

Reduced Contaminants

The PENTEK-BBF1-20MB reduces the following contaminants:

  • Dirt
  • Sand
  • Sediment
  • Silt
  • Total Dissolved Solids (TDS)

The PENTEK-BBF1-20MB is comparable with the following part numbers


User Guide


  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.