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Give it purpose - fill it with water filters, air filters, refrigerator filters, and more.
The Pentek CBC20-BB .5 Micron 20" Big Blue Carbon Block Water Filter not only reduces chlorine taste & odor and sediment, but also reduces Giardia cysts and Cryptosporidium up to 99.95%. Because of its design and high dirt holding capacity the CBC-20BB is ideal for use in large residential, commercial, and some industrial applications.
The Pentek, Culligan CBC20-BB specifications:
The CBC20-BB is also known as part number 155312 by Ametek, Culligan, Pentek, American Plumber, Us Filter, Plymouth, Ace and other brands. Also replaces GBR-20 by Keystone. Fits most 20" Filter Housings including the 20 inch Big Blue.