The 3M Model B3 Replacement Cartridge is designed for use in the 3M Recreational Vehicle / Marine Filtration Systems WV-A3, and WV-B3. NSF Tested and Certified. Part number 5613417.

B3 Specifications:

• Reduces >95% of Chlorine
• Reduces Sediment, Dirt, Rust, Sand, and Silt
• Built-In Bacteria Inhibitor
• Patented Carbon Block for Improved Absorption
• 3.5 GPM Flow Rate
• 15,000 Gallon Filter Capacity
• 4 7/16" x 13 3/4" Dimensions

The 3M Model B3 is also NSF/ANSI Standard 53 Tested to reduce:

• Parasitic Cysts (Giardia, Cryptosporidium)
• Bacteria (E.Coli, Pseudomonas, Diminuta)
• Algae
• Mold Spores

The Model B-3 should be changed every 1 year or 15000 Gallons depending on water quality and usage.