Pentek Ep-20bb Carbon Block Whole House Water Filter Cartridge, 5 Micron, 20" X 4.5" (item #155583-43)

Keep your whole-house water tasting cleaner and fresher with the Pentek EP-20BB carbon block replacement filter cartridge (Item #155583-43). Built for standard 20" x 4.5" Big Blue filter housings, this cartridge is engineered with a nominal 5-micron rating to reduce chlorine taste and odor, bad taste and odor, and fine sediment — delivering noticeably crisper drinking and tap water throughout the home.

The EP-20BB uses a bonded powdered activated carbon (PAC) block wrapped in Pentek's Endurawrap pre-filter layer, which traps dirt and sediment before it reaches the carbon media. This design extends service life by preventing premature clogging, so the cartridge keeps performing at a steady flow rate of up to 4 GPM with just 5.5 PSI pressure drop at 2 GPM, and a rated capacity of roughly 44,000 gallons.

Ideal for large households (4+ occupants) relying on municipal or chlorinated water supplies, the EP-20BB is a direct-fit replacement for most standard Big Blue whole house filter systems. Filter media is tested and certified by NSF International to NSF/ANSI Standard 42 for chlorine, taste, and odor reduction.

Key Specs:

• Item #: 155583-43 (EP-20BB)
• Micron Rating: 5 (nominal)
• Dimensions: 20" x 4.5"
• Media: Carbon block (bonded PAC) with Endurawrap pre-filter
• Flow Rate: 4 GPM
• Capacity: ~44,000 gallons
• Certification: NSF/ANSI Standard 42
• Operating Temp: 40°F–180°F (4.4°C–82.2°C)