Whole House Systems
  • Drinking Water Systems
  • Replacement Filters
  • Pentek


    Pentek GAC-20BB Drinking Water Filters (20-inch x 4.5-inch)

    Fits most standard housings built for 20-inch x 4.5-inch filter cartridges
    • High quality, great value replacement filter

    • Provides better tasting water in every glass

    • Has a long filter life of 6 months or 25,000 gallons

    • Compatible with a wide range of filters and housings

    format_list_bulleted Features & Specs
    Package Qty: 1
    Manufacturer: Pentair Water
    Manufacturer's Id: GAC20-BB
    UPC: 051678249437
    Actual Size (in): 20 inches (length) x 4 1/2 inches (outside diameter)
    Media: Granular Activated Carbon
    Primary Filter Media: Granular Activated Carbon
    Operating Temperature (°F): 40 - 125
    Operating Temperature (°C): 4.4 - 51.7
    Brand: Pentek
    Advertised Size: 20 x 4-1/2
    Length (in): 20 in
    Outside Diameter (in): 4.5 in
    Width (in): 4.5 in
    Materials of Construction: End Caps: Polystyrene, Outer Casing: Polystyrene, Expansion Pad: Polypropylene, Gaskets: Buna-N (top) and Santoprene (bottom)
    Media Type: Carbon Filter
    Post Filter Media: Spun Polypropylene
    UPC's For Search: 10051678249434
    Country of Origin: China
    Micron Rating Nominal: 20
    Flow Rate (gpm): 4.0
    Includes: One Pentek GAC-20BB 20 x 4.5 Inch Drinking Water Filter
    description Instructions
    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.
    file_download Downloads
    workspace_premium Certifications
  • NSF/ANSI Standard 42
  • warning_amber Contaminants Reduced
  • Bad Taste And Odor
  • Chlorine
  • Sediment
  • filter_alt Filter Life
    Filter Life (gallons): 25000
    Filter Life (months): 6 months

    Prop65 warning applies to products that contain carbon media. Click here for more details

    WARNING: This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer and birth defects, or other reproductive harm. For more information go to www.p65warnings.ca.gov

    Pentek GAC-20BB Filter Advantages

    The Pentek GAC-20BB water filter reduces chlorine taste and odor in your drinking water. The Pentek GAC-20BB filter cartridge has a 20 micron postfilter that reduces carbon fines from the drinking water. This filter produces healthier, better-tasting drinking water. The Pentek GAC-20BB filter cartridge is effective at reducing bad taste & odor as well as chlorine taste & odor. The Pentek GAC-20BB water filters are designed to allow maximum contact between the water and carbon, ensuring maximum adsorption. The Pentek GAC-20BB filters effectively provide good general purpose drinking water filtration.

    Compatibility and Functionality

    The Pentek GAC-20BB water filter is the same as the Everpure EV910842, Everpure DEV910842, Everpure 9108-42, Everpure CGT-204, Bunn C-30, Selecto 101-300, and ShurFlo 15-053-02 Water Filters. The Pentek GAC-20BB filter is NOT recommended for use in a whole house application. This item may not be suitable for providing water to the whole house since there will be a drop in pressure from the carbon media of the filter. If you are looking for a whole house filter, the RFC-20BB filter is a better filter for a whole house application.

    Pentek GAC-20BB Filter Design

    The Pentek GAC-20BB filter cartridge construction allows water to enter at one end and pass through the entire length of the carbon bed before exiting the other end of the cartridge, an internal expansion pad minimizes channeling or bypass. Before the water exits the cartridge, a 20 micron postfilter helps reduce carbon fines and other suspended particles from the filtered water. The postfilter is permanently fastened to an innovative support basket ensuring that it is firmly secured and eliminating any potential for bypass.

    For more information please visit our specifications page and read the Pentek GAC-20BB User Guide

    PENTEK-GAC20-BB   is comparable with the following part number(s)

    • 155249-43
    • GAC20-BB
    • GAC-20BB