Pentek R50-BB Big Blue 50-Micron Pleated Sediment Filter – 10 x 4.5 inch (2-Pack)

Overview

Meet the Pentek R50-BB Big Blue filter cartridge. Designed for whole-house protection, this 50 micron pleated sediment filter uses a durable polyester media wrapped around a strong polypropylene core. The combination creates a robust, reusable filter that helps keep your water flow clean and steady.

What makes it stand out

Big Blue cartridges offer more surface area than standard 10 x 4.5 inch options. With more than 16 square feet of pleated media (the Big Blue version), this design captures dirt, sand, silt, and rust more efficiently, reducing the amount of sediment that reaches plumbing and downstream cartridges.

• More than 16 square feet of pleated media, delivering higher dirt-holding capacity
• 50 micron nominal rating to target visible sediment while preserving flow
• Thermo-sealed endcaps with reinforced seams for reliability

Durable and reusable design

The media is a washable, non-woven polyester fabric, offering the possibility to clean and reuse the cartridge multiple times. This approach can extend the life of the cartridge and reduce replacement costs over time, especially in homes with frequent sediment challenges.

Flow, compatibility, and installation notes

The filter is designed to fit all 10 x 4.5 inch Big Blue housings, featuring molded endcaps with integrated gaskets that help maintain a secure, leak-free seal. The system typically experiences a low initial pressure drop less than 1 psi at 10 gpm, so the overall home water pressure remains consistent.

• Fits all 10 x 4.5 inch Big Blue housings
• Integrated gaskets for a secure, leak-free seal

What’s included

This listing is for a pack of two cartridges. Each cartridge is ready for use in compatible Big Blue housings and can be swapped in when the cartridge has reached the end of its service life with proper maintenance.