3M RV/Marine US-A1 Full Flow Undersink Water Filtration System
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  • 3M RV/Marine US-A1 Full Flow Undersink Water Filtration System

3M RV/Marine US-A1 Full Flow Undersink Water Filtration System

The 3M RV and Marine US-A1 full flow undersink water filtration system reduces contaminants and provides fresher, clearer, odor-free, good-tasting drinking, cooking and bathing water directly from the tap.

Replacement Cartridge: Model A1 (MMM-016145-11530)
Upgrade Cartridge: Model B1 (MMM-051128-89428)

Note: The B1 cartridge provides additional protection from common water-borne bacteria and parasitic cysts.

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Tech Spec Product Info User Generated Content


  • Model A1 - Filter Performance:

  • Reduces >95% Chlorine Taste & Odor
  • Includes Bacteria Growth Inhibitor
  • Reduces Sand, Silt, Dirt, Rust & Sediment down to 1 micron
  • 1.5 GPM Flow Rate, 2,000 Gallon Capacity
  • Filter System Installation kit includes:

  • Filter head/mounting bracket
  • Cartridge: Model A1
  • (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.

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