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Watts 20" x 4.5" GAC Filter Cartridge - WW


Watts 20" x 4.5" GAC Filter Cartridge - WW
$41.00 /ea
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Product Information

Note: The Watts 20" GAC Filter Cartridge (GAC-BB20) is no longer available for order. We recommend the Filters Fast FF20GAC-20. We apologize for any inconvenience.

The Watts 20" GAC Filter Cartridge (GAC-BB20) is a water washed (WW) granular activated coconut carbon water filter replacement cartridge used to reduce the bad taste and odor of chlorine in whole house filtration systems as well as a variety of full-flow and low-flow applications such as under sink, countertop, and pre/post-reverse osmosis filtration systems. This filter may also be used in some humidifying systems, recreational vehicle filtration systems, and food service applications.

This Watts GAC-BB20 GAC filter features water washed coconut shell granular activated carbon (GAC) technology for more advanced water filtration.

This Watts 20" GAC filter is a compatible replacement water filter cartridge with similar 20" GAC filter brands including the Pentek GAC-20-BB, Pentek RFC20-BB, Ametek GAC-20-BB, Culligan 20 inch filter, Whirlpool, US Filter, Ace, American Plumber, Bruner, Plymouth, Pentair, and other name brands. It will fit all water filter housings which use 20" x 4 1/2" large filter replacement cartridges.

Watts 20" Granular Activated Carbon Water Washed Coconut Shell Filter Cartridge Specifications (GAC-BB20):

  • Dimensions: 20" x 4 1/2"
  • Filter Life: 15000 Gallons or 12 months
  • Max. Flow Rate: 5 Gallons Per Minute (GPM)
  • Min./Max. Temperature: 40 - 100 F
  • Min./Max. Working Pressure: 20 - 125 PSI
  • Cartridge Body: NSF listed polypropylene
  • Media: Water washed coconut shell granular activated carbon


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