The Pentek EPM-20BB delivers economical whole-house filtration with modified epsilon carbon-briquette technology that balances sediment removal, chlorine reduction, and high flow capacity in a 20" x 4.5" cartridge. Endurawrap polyolefin pre-filter protection extends service life by trapping sediment before it clogs the carbon block, maximizing the full 30,000-gallon capacity.
SPECIFICATIONS
Pentek EPM-20BB Technical Details
| Model Number | EPM-20BB |
| Dimensions | 20" x 4.5" (4-5/8" OD) |
| Filtration Rating | 10 Micron Nominal |
| Filter Media | Bonded PAC Carbon Block |
| Capacity | 30,000 Gallons |
| Pressure Drop | 4.0 psi @ 4 GPM |
| Temperature Range | 40°F to 180°F |
| End Caps / Wrap | Polystyrene / Polyolefin Endurawrap |
INSTALLATION & USE
Installing Your EPM-20BB Filter
- Shut off water supply and relieve pressure from your 20" Big Blue housing by opening a downstream faucet
- Unscrew housing sump, remove old cartridge, and clean sump interior with mild soap and water
- Insert the EPM-20BB cartridge into the housing with the Endurawrap side facing outward, ensuring proper seal with the housing cap
- Reinstall sump hand-tight, turn water supply back on slowly, and check for leaks around the housing o-ring
- Flush the new cartridge for 5 minutes to remove any carbon fines and activate the media
COMPATIBILITY
Housing & Application Fit
The Pentek EPM-20BB fits all standard 20-inch Big Blue filter housings with 4.5" diameter capacity, including Pentek, Culligan, and most major brands. This cartridge is designed for whole-house, well water, and commercial applications where economical chlorine taste and odor reduction is needed alongside sediment filtration. The high-porosity carbon block construction maintains flow rates suitable for residential and light commercial installations while the Endurawrap pre-filter extends service life in moderate to heavy sediment conditions.
🔧 Pro Tip: Mark your calendar when you install the EPM-20BB. Even if pressure remains normal, replace at 30,000 gallons or 12 months to prevent channeling and ensure consistent chlorine reduction throughout the cartridge's service life.
