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3M™ Reverse Osmosis Drinking Water Filtration System (3MRO401)

Availability: In stock

Model No: 3MRO401

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The 3M™ Reverse Osmosis Drinking Water Filtration System helps provide cleaner, better tasting water through reverse osmosis filtration. 3MRO401 offers multi-stage filtration, incorporating separate sediment and chlorine taste & odor filters for excellent membrane module protection, a sanitary, encapsulated reverse osmosis membrane, and carbon block post-filter for superior flow from a dedicated faucet.

The system is powered by residential line pressure — no electricity required. The system helps conserve water, shutting down when the storage tank is full and turning back on to refill the tank. Replacement filters are easy to change – twist on, twist off, no mess.


  • System installs under the sink and uses designated faucet (included) for drinking and cooking water use
  • Designer faucets are also available
  • Helps conserve water by automatically stopping production when tank is full
  • Filters easily changed by hand
  • System is NSF Standards 42, 53 and 58 certified*
  • Reverse osmosis membrane module capable of producing up to 18.95 gallons (71.73 liters) per day of clean, fresh water every 24 hours†
  • Reduces Sediment, Chlorine Taste & Odor, Cysts, Arsenic, Barium, Cadmium, Chromium (Hex), Chromium (Tri), Copper, Fluoride, Lead, Radium, Selenium, Select Volatile Organic Compounds (VOCs), Turbidity and Total Dissolved Solids (TDS)*

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† Nominal production rate of membrane when running to atmosphere (i.e., with empty tank) at 77° F and 50 PSI is 18.95 gpd (71.73 lpd). Production varies based on pressure (fullness) of storage tank.

* See Performance Data Sheet for additional details.


Additional Information

Reduction Claims

Sediment, Chlorine Taste & Odor, Cysts, Arsenic, Barium, Cadmium, Chromium (Hex), Chromium (Tri), Copper, Fluoride, Lead, Radium, Selenium, Select VOCs (Carbofuran, Toxaphene, p-Dichlorobenzene & o-Dichlorobenzene), Turbidity and Total Dissolved Solids (TDS)**

*NSF certification for Arsenic reduction stipulates that this product is intended for use only on water supplies that have been shown to be at or below the referenced concentration and valency of arsenic.

**(See Performance Data Sheet for Additional Reduction Claims)

Dimensions 16.06"x13.94"x4.38" (40.8 cm x 35.4 cm x 11.2 cm)
Temperature Range 40 - 100°F (4.4 - 37.8°C)
Pressure Range 40 - 100 psi (276 - 689 kPa)
Flow Rate 0.6 gpm (2.3 lpm)
Replacement Filter 3MROP411, 3MROP412, 3MROM413, 3MROP416
Replacement Interval varies
Installation Manual 3MRO401_manual.pdf
Specification Sheet 3MRO401_spec.pdf
Performance Data Sheet 3MRO401_pds.pdf
California Certification 3MRO401_cacert.pdf

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Installation Difficulty

Novice Installation Skills Intermediate Installation Skills Advanced Installation Skills Professional Installation

Skills Needed:

  • Professional installation recommended*

*(See Install Manual in Specifications Tab for More Details)

Items Required (not included):

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