Pentek NCP-20BB Big Blue Carbon Water Filter Pack of 2 - Whole House

In this review the Pentek NCP-20BB is evaluated as a straightforward replacement option for whole-house Big Blue systems, aimed at homeowners and DIYers who need combined sediment and carbon taste and odor control in one cartridge. The single biggest reason to buy is its non-cellulose, pleated carbon design that offers higher dirt-holding capacity with minimal pressure drop, so it lasts longer between changes while reducing chlorine taste and common well water smells. For anyone running municipal or non-chlorinated water, this cartridge is a practical, low-fuss choice.

Key Features

• Combined sediment and carbon filtration: The cartridge removes particulates while also reducing chlorine taste and odor so you get clearer, better-tasting water from one element.
• Non-cellulose media: Suitable for both municipal and non-chlorinated water applications, unlike cellulose filters that can be limited to chlorinated supplies.
• Pleated polyester construction: Pleats increase surface area for high dirt loading capacity, which helps maintain flow and reduce pressure drop over the life of the cartridge.
• Carbon impregnated media: Carbon throughout the media provides effective taste and odor reduction and serves as a polishing stage for post reverse osmosis or well water systems.
• 20 in Big Blue compatibility: Fits all 20 in Big Blue housings and most heavy duty 20 in x 4.5 in housings, making it a direct replacement with easy installation.

Who It's For

The Pentek NCP-20BB is best for homeowners with whole-house 20 in Big Blue style housings who want a single cartridge that handles both sediment and chlorine taste and odor reduction. It is also a practical pick for well water polishers and post reverse osmosis systems that need additional carbon-based taste and odor control.

Those who should look elsewhere include users who require ultra-fine micron ratings below 10 micron for specialized filtration or those who need a purely mechanical sediment cartridge with no carbon content. If absolute zero carbon particulates are critical, a different media type or additional pre/post filtration steps may be warranted.

Pros & Cons

Pros

• Effective combined removal of sediment and chlorine taste and odor for improved water taste and smell.
• High dirt loading capacity from pleated polyester results in longer service life and lower pressure drop.
• Non-cellulose construction allows use with municipal and non-chlorinated water applications.
• Pack of 2 provides value and a ready spare for scheduled maintenance.

Cons

• Some users report variable longevity and occasional carbon particles when new, so initial flushing is recommended.

Specifications

Brand	Pentek
Model Series	NCP
Size	20 in x 4.5 in
Micron Rating	10 micron
Media Type	Carbon impregnated non-cellulose pleated polyester
Pack Quantity	2 cartridges

Our Verdict

The Pentek NCP-20BB pack of 2 is a sensible buy for most whole-house Big Blue installations because it combines sediment capture and carbon taste and odor reduction in a durable pleated design, offering extended service life and good value. Homeowners who want dependable, easy replacements that fit standard 20 in housings will find this a practical, cost-effective choice.

Frequently Asked Questions

Will this fit my Big Blue housing?
Yes, it is designed to fit all 20 in Big Blue housings and most heavy duty 20 in x 4.5 in housings as a direct replacement.

Is it safe for non-chlorinated well water?
Yes, the non-cellulose carbon impregnated media is suitable for both municipal and non-chlorinated water applications.

Should I flush the cartridge before use?
Yes, initial flushing is recommended to minimize any loose carbon fines and to establish normal flow and water clarity.