Description
OVERVIEW
The 3M™ 3MRO401 four-stage reverse osmosis system provides cleaner, better-tasting water directly at the faucet. This multi-stage system includes separate sediment and chlorine taste and odor filters that help protect the membrane module. The membrane is fully encapsulated and paired with a carbon post-filter to deliver superior flow through a dedicated faucet. The system operates without electricity and is powered solely by water line pressure. Filter replacement is simple and mess-free with a twist-on, twist-off design.
PRODUCT DOCUMENTATION
Official documentation is available to support installation, operation, and maintenance of the 3MRO401 reverse osmosis system.
- 3MRO System Brochure
- 3MRO401 Systems Manual
FEATURES AND BENEFITS
The 3MRO401 system is designed to deliver high-performance filtration while maximizing convenience and space efficiency.
- Four-stage filtration for improved water quality.
- Sanitary quick change system eliminates the need to handle filter media.
- Easy filter replacement with a simple 1/4-turn design.
- NSF certified for quality and performance assurance.
- Limited 10-year warranty.
- Slim profile and space-saving design.
- No electricity required; powered by water line pressure.
- California certification 08-1902.
SPECIFICATION
Technical specifications outlining system capacity, operating conditions, and performance of the 3MRO401 reverse osmosis system.
- Part Number: 3MRO401
- Storage Tank: 2.22 gallons maximum
- Faucet: Upgraded chrome finish with air gap
- Water Pressure: 40–100 psi (276–690 kPa)
- Water Temperature: 40–100°F (4.4–38°C), cold water use only
- pH Range: 4.0–11.0
- Maximum TDS Level: 2000
- System Production: 20 gallons per day (41.6 liters per day)
REPLACEMENT FILTERS
Approved replacement filters designed to maintain optimal performance of the 3MRO401 reverse osmosis system.
- Stage #1: 3MROP411 – 5 micron sediment pre-filter (for use in 3MRO401 and 3MRO501 RO systems)
- Stage #2: 3MROP412 – granular activated carbon prefilter (for use in 3MRO401 and 3MRO501 RO systems)
- Stage #3: 3MROM413 – thin film composite (TFC) RO membrane (for use in 3MRO301, 3MRO401, and 3MRO501 RO systems)
- Stage #4: 3MROP416 – activated carbon block post-filter (for use in 3MRO401 and 3MRO501 RO systems)




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