Pentek NCP-20BB Big Blue Carbon Water Filter - Whole House 20in

In this review the Pentek NCP-20BB Big Blue carbon water filter is evaluated for whole house and heavy duty applications; it is aimed at homeowners and small businesses seeking combined sediment removal and chlorine taste and odor reduction. The single biggest reason to consider this cartridge pack is the combination of pleated polyester media with carbon impregnation, which delivers high dirt loading and extended service life in a 20in x 4.5in Big Blue format while fitting standard 20in heavy duty housings.

Key Features

• Combined filtration: Sediment filtration and carbon taste and odor reduction are provided in one cartridge to simplify maintenance and improve water flavor.
• Pleated design: The pleated polyester media offers additional surface area for high dirt loading capacity while keeping pressure drop minimal.
• Non-cellulose construction: Carbon impregnated non-cellulose media makes the cartridge suitable for both municipal and non-chlorinated water applications.
• Wide compatibility: Fits all standard 20in Big Blue housings or other 20in heavy duty housings as a direct 20in x 4.5in replacement.
• Extended service life: The combination of pleated polyester and carbon filtration produces a longer usable life compared with some non-pleated carbon cartridges.

Who It's For

The NCP-20BB is best for homeowners with whole house Big Blue systems, users on well water who need polish filtration after other treatments, and anyone who wants to reduce chlorine taste and odor without sacrificing sediment capacity. It is also a practical choice for post reverse osmosis polishing or closed loop process water where a non-cellulose carbon filter is required.

Those who should look elsewhere include people who need sub-micron filtration for microbiological protection or those who require a certified specialized media for specific contaminants not addressed by carbon impregnation. If absolute carbon-free startup water is essential, some users report initial carbon fines that may require flushing.

Pros & Cons

Pros

• Good combination of sediment capture and chlorine taste and odor reduction in one 20in cartridge.
• Pleated polyester media increases dirt holding capacity and helps maintain low pressure drop.
• Fits standard 20in Big Blue housings and replaces common 20in x 4.5in carbon filters easily.
• Non-cellulose construction allows use on both municipal and non-chlorinated water systems.

Cons

• Some users report variable longevity; lifespan may be shorter in very dirty or high-sediment systems.
• Occasional reports of carbon fines appearing initially mean a thorough flush may be needed before use.

Specifications

Brand	Pentek
Model	NCP-20BB
Size	20in x 4.5in
Micron Rating	10 micron
Media	Pleated polyester with carbon impregnation
Pack Quantity	Pack of 6
Housing Compatibility	Fits all 20in Big Blue and similar heavy duty housings

Our Verdict

The Pentek NCP-20BB is a practical, value-oriented choice for whole house carbon polishing and sediment control in 20in Big Blue systems; it excels where users need combined taste and odor reduction plus high dirt loading without large pressure loss. It is recommended for homeowners on municipal or well water who want straightforward replacement cartridges and good overall performance for the price.

Frequently Asked Questions

Will this cartridge fit my Big Blue housing?
Yes, the cartridge is a 20in x 4.5in size designed to fit standard 20in Big Blue and comparable heavy duty housings.

Can I use this on well water?
Yes, the non-cellulose carbon impregnated media makes it suitable for municipal and non-chlorinated well water applications.

Do I need to flush the filter before use?
It is recommended to flush new carbon-impregnated cartridges to clear any initial carbon fines and ensure clean startup water.