Pentek Floplus-20bb Big Blue Carbon Block Filter Cartridge, 0.5 Micron, 20" (item #455906-43)

Item #: 455906-43 (FloPlus-20BB)
Dimensions: 4.63" x 20" (Big Blue)
Rating: 0.5 micron nominal
Pressure Drop: 4 psi @ 4 GPM
Chlorine Capacity: >50,000 gallons @ 4 GPM
Certification: NSF/ANSI Standard 53 (cyst reduction)
Temp Rating: 40°F–180°F (4.4°C–82.2°C)
Media: Bonded PAC (powdered activated carbon)

The Pentek FloPlus-20BB (Item #455906-43) is the largest cartridge in the FloPlus Series lineup — a 20" Big Blue carbon block filter engineered for whole house systems that need both fine filtration and high flow. Its modified molded carbon block media delivers 0.5-micron nominal efficiency at flow rates comparable to a standard 10-micron cartridge, solving the pressure-drop problems that typically come with fine carbon filtration.

NSF/ANSI Standard 53 certified for the mechanical reduction of Cryptosporidium and Giardia cysts, the FloPlus-20BB also provides outstanding chlorine taste and odor reduction with a rated capacity of over 50,000 gallons at 4 GPM. Sized at 4.63" x 20" for standard 20" Big Blue housings, it's built for whole house cyst reduction and carbon treatment where low pressure drop, infrequent cartridge changes, and high flow are priorities.