The 3M Model C Replacement Cartridge is designed for use in the 3M Recreational Vehicle / Marine Filtration System USF-C, USFC and USF-A, USFA. Part number 5614506.

C Specifications:

• Reduces >95% of Chlorine
• Reduces Sediment, Dirt, Rust, Sand, and Silt down to 0.5 micron
• Built-In Bacteria Inhibitor
• 0.5 GPM Flow Rate
• 500 Gallon Filter Capacity
• 11.5" x 2.26" Dimensions
• Patented Carbon Block for improved absorption

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

• Parasitic Cysts (Giardia, Cryptosporidium)
• Benzene, DiChlorobenzene, Toxaphene
• Lead
• Mercury
• Turbidity

The C should be changed every 6 months or 500 Gallons depending on water quality and usage.