Filters Fast® FF20BBS-25 Replacement for Pentek RFC20-BB
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Filters Fast® FF20BBS-25 Replacement for Pentek RFC20-BB

Retail: $79.99
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Pentek RFC20-BB Radial Flow GAC Water Filter Cartridge

Retail: $121.19
You Save: 29%
Buy 1 - 5 for $86.21 ea.
Buy 6+ for $82.21 ea.

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70000 Gallons
5500 Gallons
Media Type
Micron Rating
Reduces Sediment
Reduces Bad Taste
Reduces Odor
Reduces Chlorine Taste
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Product Information
Filters Fast FF20BBS-25
Pentek RFC20-BB

The Pentek RFC20-BB Radial Flow GAC Water Filter Cartridge, used in place of the WRC25HD20, is a radial flow filter that reduces chlorine taste & odor and other bad tastes, including coarse sand, rust, and scale particles in your water. This whole home water filter features a radial design and extra length that provides a higher flow rate for your whole house.


  • Brand: Pentek
  • Part Number(s): RFC20-BB, 155247-43
  • Micron Rating: 25
  • Service Life: 70,000 gallons (chlorine @ 4 gpm) / 6 months
  • Dimensions: 4-1/2" x 20"
  • Operating Temperature: 40 - 125° F
  • Flow Rate: 4 GPM @ 0.90 psi drop
  • Reduces Chlorine and Bad Taste & Odor
  • Meets NSF Standard: 42
  • Reduces: Sand, Rust, Dirt and Scale Particles
  • Capacity for Chlorine Reduction: 70,000 @ 4 GPM

How do you install the Pentek RFC20-BB?

  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.Most fit issues result from either an old cartridge o-ring that fell off when removing the old cartridge, or failing to get the standpipe lined up when hand tightening the housing.

How often should you replace the Pentek RFC20-BB?

  • Changing your Pentek RFC20-BB is a very quick and easy process that should be done once every six months.

What contaminants does the Pentek RFC20-BB reduce?

  • The Pentek RFC20-BB reduces the following contaminants:

    • Sediment
    • Bad Taste & Odor


Compatible Parts:

The Pentek RFC20-BB is the correct replacement for the following part numbers:

Part Number
PENTEK 155247-43
No results for {X}

Compatible Models:

The Pentek RFC20-BB is correct replacement for the following model numbers:

BrandModel NumberDescription
American Plumber W2010-PR Housing
American Plumber W2015-PR Housing
No results for {X}
prop 65 warning California Residents: Prop 65 Warning

Reviews from Trustpilot

Customer Reviews

Total Reviews: 2 Average Rating: 5 / 5.0


Great price

Collected by
hopeful tourist2022-01-05

been a good product for our system in central Texas

Collected by

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