The Tier1 EP-20BB comparable replacement cartridge has a 5-micron nominal rating. This carbon block filter is specifically engineered to reduce chlorine taste and odor, sediment, and fine particulates down to 5 microns in size, making it an effective whole-house or point-of-entry solution for improving overall water quality while maintaining strong flow rates for 20" Big Blue housings.

This Tier1 EP-20BB comparable replacement cartridge has a rated service life of up to 20,000 gallons or approximately 6 months, whichever comes first. Actual lifespan can vary based on your incoming water quality, chlorine levels, sediment load, and household water usage. For households with heavier sediment or higher chlorine content, more frequent replacement may be necessary to maintain optimal taste, odor reduction, and flow rate.

The Tier1 EP-20BB comparable cartridge measures 20 inches in length by 4.5 inches in diameter, making it a direct fit for standard 20" Big Blue (BB) filter housings. It is designed as a comparable replacement for the Pentek EP-20BB (Part #155583-43) and fits most whole-house systems that accept 20" x 4.5" cartridges. The kit also includes a replacement O-ring and food-grade silicone lubricant to ensure a leak-free seal during installation.

The Tier1 EP-20BB comparable replacement cartridge is manufactured using components tested and certified to NSF/ANSI Standard 42 for material safety and chlorine taste and odor reduction. The carbon block media is made from high-quality coconut shell carbon, which provides superior adsorption of chlorine and organic compounds compared to standard granular activated carbon, delivering cleaner, better-tasting water throughout your entire home.

The included O-ring and food-grade silicone lubricant are essential for properly maintaining your Big Blue housing each time you replace the EP-20BB cartridge. Over time, the housing O-ring can dry out, crack, or compress, leading to leaks. Replacing the O-ring with every cartridge change and applying a thin layer of silicone lubricant ensures a watertight seal, extends the life of your housing, and prevents pressure loss or drips during operation of your Tier1 whole-house filtration system.