3M RV/Marine US-B1 Water Filtration System
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  • 3M RV/Marine US-B1 Water Filtration System

3M RV/Marine US-B1 Undersink Water Filtration System

The 3M RV and Marine US-B1 Full Flow Undersink Water Filtration System reduces contaminants and provides protection from common water borne bacteria and parasitic cysts. Get fresher, clearer, odor-free, good-tasting drinking, cooking and bathing water directly from the tap on your boat or RV.

Replacement Cartridge: Model B1

(Item: 3M-18355), for use with Model US-B1 or US-A1
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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
  • Filter System Installation kit includes:

  • Filter head/mounting bracket
  • Cartridge: Model B1
  • (1) 1/2" CTS x 1/2" CTS Elbow push in fitting
  • (1) 1/2" x 3/8" Faucet Adapter
  • (1) 1/2" x 3/8" Stem Reducer
  • 3/8" Tubing
  • By-Pass Plug


Features:  Benefits: 
By-Pass Plug  Allows for easy winterizing & line sanitizing 
Compact design  Fits in tight places without taking up valuable space 
Easy to Install  NO special tools required 
Full Flow  Use on existing faucet for all cold water use 
Push-in Fittings  Provides easy DIY connection to existing water supply lines 
Sanitary Quick Change with shut off-valve  Change cartridge in seconds with no water spillage 

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.

4.0 1

Compact and good performing unit


The perfect setup for an RV or boat. The kit is very complete and compact when installed. Does not need much space.


Parma, OH


3M RV/Marine US-B1 Undersink Water Filtration System



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