3M cartridge B1 for US-B1
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3M RV/Marine Filter Cartridge B1 for US-B1 Filtration System

3M filter cartridge B1 for the US-B1 water filtration system commonly used to filter and purify potable water on boats and RVs. Sanitary cartridges require no contact with the filter media during cartridge change-out.

Fits Filtration System: Model US-B1 (MMM-016145-11538)
Fits Filtration System: Model US-A1 (MMM-016145-11529)

Note: The B1 cartridge is an upgrade over the standard A1 cartridge for use with the US-A1 Filtration System.

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Tech Spec Product Info User Generated Content


  • Model B1 - Filter Performance:

  • Reduces >95% Chlorine Taste & Odor
  • Reduces 99.99% of Bacteria
  • Reduces 99.99% Mold Spores, Cysts and Algae
  • Reduces Sand, Silt, Dirt, Rust & Sediment down to 0.2 micron
  • 1.5 GPM Flow Rate, 2,000 Gallon Capacity


3M RV and Marine Filtration Systems are specifically designed to address a wide range of concerns about the quality of water from campground, marina and other public hookups. 3M filters help to provide high quality water for drinking; coffee, tea, ice, cooking and washing.

5.0 2

Good filter at a great place to buy


Good upgrade from the A1 filter. Great service as always from Jamestown and will purchase again from this fine establishment.

The View

Northern WI


Makes good tasting water from smelly.


We use this in our RV. Some campsites have water that you can smell but this filter keeps it tasting good. Also one year we forgot to run a bleach flush through the system after draining the antifreeze and the tank turned bad. Didn't know that until I took a shower and smelled the water. The taste was still fine on the filtered sinks. Most years one filter lasts the whole season.

Ken C

Central New York


3M RV/Marine Filter Cartridge B1 for US-B1 Filtration System



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