Pentek GAC-BB, 155153-43 Big Blue GAC Water Filter Cartridge
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Pentek GAC-BB, 155153-43 Big Blue GAC Water Filter Cartridge

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GAC-BB Filters Fast® FFGAC-10BB Replacement for Pentek GAC-BB

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Media Type
Micron Rating
Reduces Sediment
Reduces Bad Taste
Reduces Odor
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Product Information

The Pentek GAC-BB, 155153-43 Big Blue GAC Water Filter Cartridge reduces bad tastes and odors, as well as chlorine taste and odor, in your water. The GAC-BB filter design promotes maximum carbon/water contact time, therefore maximizing filtration efficiency. This Big Blue filter is also known as the GAC-BB, GACBB, and GAC-BBS by Ametek, Culligan, and US Filter, as part number 155153, and as the American Plumber WGCHD Heavy Duty GAC Water Filter Cartridge. The Pentek GAC-BB needs to be replaced every 3 - 6 months, or based upon the return of bad taste or odor or a decrease in water pressure.


  • Brand: Pentek
  • Part Number: GAC-BB, 155153-43
  • Pack Size: 1
  • Filter Life (Months): 3 - 6 months (depending on water quality and usage)
  • Dimensions: 4-1/2" x 9-3/4"
  • Flow Rate: 2 gpm
  • Operating Temperature: 40 - 125° F
  • NSF Certification(s): 42

How do you install the Pentek GAC-BB, 155153-43?

  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 Pentek GAC-BB, 155153-43 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 Pentek GAC-BB, 155153-43 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.

How often should you replace the Pentek GAC-BB, 155153-43?

  • Changing your Pentek GAC-BB, 155153-43 is a very quick and easy process that should be done once every three to six months.

What contaminants does the Pentek GAC-BB, 155153-43 reduce?

  • The Pentek GAC-BB, 155153-43 is NSF 42 certified, which means that it reduces the following contaminants:

    • Chlorine Taste & Odor

Compatible Models:

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

BrandModel NumberDescription
Ametek 10 BIG BLUE HOUSINGS Under Sink Filters
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prop 65 warning California Residents: Prop 65 Warning

Customer Reviews:

Total Reviews: 9 Average Rating: 5 / 5.0

Filtersfast Reviews on Trust Pilot external site

Water tastes a lot better.

Collected by
Stephen Hamlet2023-12-30

It is my standard go-to filter

Collected by
Sheri Hanson2023-08-11

Your customer support team is one of the best. Thank you Alli for your great kindness in addressing my issues.

Collected by

Over very few years the prices are way to high.

Collected by

Excellent filter to use in whole house systems needing to filter carbons and magnesium out of water. It works great.

Collected by
Thomas Vagt2022-01-19

Great price fast delivery fantastic product

Collected by
Rick Eisenhard2022-01-01

Great product @ competitive price

Collected by

:) Awesome!!!!

Collected by
Keith Costley2007-11-21

The American Plumber WGCHD GAC Filter is absolutely wonderful! Even though the filter manufacturer recommends that the filter be replaced every three months and/or when water pressure decreases, etc.,., we used a single filter and replaced it two years later! Our water pressure did not decrease where it was noticable. After two years, the water did get a bit smelly, however, not too bad. I would not recommend replacing the filter every two years. Perhaps we got lucky. It is a wonderful product and really does make a difference in water quality!

Collected by

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