3M Model B1 Replacement Cartridge

The 3M Model B1 Replacement Cartridge is designed for use in the 3M Recreational Vehicle / Marine Filtration System US-B1 and US-A1.

B1 Specifications:

• Reduces >95% of Chlorine
• Reduces Sediment, Dirt, Rust, Sand, and Silt down to 0.2 micron
• Reduces Bacteria up to 99.9999%
• Reduces Cysts (Giardia, Cryptosporidium) up to 99.999%
• Reduces Algae and Mold Spores up to 99.9999%
• Patented Carbon Block for Improved Absorption
• Patented Dual-Zone Nylon Membrane Bacteria Barrier
• 1.5 GPM Flow Rate
• 2000 Gallon Filter Capacity
• Built-In Bacteria Inhibitor

The B-1 should be changed every 6-8 months or 2000 Gallons depending on water quality and usage.