The Pentek BBF1-20MB is a 1 micron nominal Big Blue whole house filter cartridge. This fine filtration rating makes it highly effective at reducing fine sediment, silt, rust particles, and cyst-sized contaminants from your home's entire water supply, while the melt blown polypropylene construction ensures consistent performance throughout the cartridge life.

The Pentek BBF1-20MB typically lasts 3 to 6 months depending on your household water usage and incoming water quality. Homes with high sediment levels or well water may need to replace the cartridge more frequently. We recommend monitoring pressure drop across your Big Blue housing and replacing the BBF1-20MB when you notice a significant reduction in water flow.

The Pentek BBF1-20MB measures 20 inches in length by 4.5 inches in diameter, making it a standard Big Blue size cartridge. It fits most 20-inch Big Blue whole house filter housings, including Pentek, Pentair, and compatible systems. Always verify your housing dimensions before ordering to ensure proper fitment.

The Pentek BBF1-20MB is a melt blown polypropylene depth filter engineered to reduce fine sediment, sand, silt, rust flakes, scale particles, and other suspended solids down to 1 micron. Its graded density construction traps larger particles in the outer layers and finer particles toward the core, extending service life and protecting downstream appliances, plumbing, and point-of-use filters throughout your home.

The Pentek BBF1-20MB is manufactured from FDA-compliant polypropylene materials that meet requirements for potable water applications. The melt blown construction contains no binders, adhesives, or surfactants that could leach into your water supply, making it a clean, safe choice for whole house sediment filtration ahead of your drinking water system.