Home Menu Close Nav Left Nav Right Arrow Left Arrow Right Literature Symbol Propane Symbol Heat Waves Symbol Phone Symbol Flame Symbol Electricity Symbol New Electric Symbol New Gas Symbol Clipboard Symbol Signature Signature Select Signature Premier
Product image
Click to Enlarge

Reverse Osmosis System with Microbial Boost

Model: AO-US-RO-MB-4000 Lowe's Item #: 960789
Shop Now at Lowe’s

Product Features

  • First Reverse Osmosis system to combine reverse osmosis, advanced Claryum® selective filtration, remineralization, and microbial boost.
  • Maximum Filtration—Reverse Osmosis reduces up to 99% of 90 harmful contaminants including bacteria, viruses, lead, fluoride, chromium, mercury, asbestos, pesticides, pharmaceuticals, and chlorine.
  • Claryum® filtration reduces harmful contaminants—those you can see, smell and taste, and those you can’t—for optimally clean water.
  • Access to clean, filtered water whenever you need it. Perfect for 1-3 people.
  • Remineralizer with Microbial Filtration—returns the healthy minerals lost in the reverse osmosis process—such as calcium, magnesium, and potassium while removing bacteria and viruses.
  • NSF Certified to standards 42, 53, 58, 401 + P473. IAPMO certified and tested to NSF/ANSI standard P231.
  • Carbon & Claryum filters and Remineralizer with Microbial Boost last 6 months or 365 gallons. RO Membrane lasts 12 months.
  • Includes first set of filters, RO tank, brushed nickel faucet, and all parts required for installation.
  • Limited 2-year warranty.

Replacement Filters

  • Claryum®, Carbon, & Microbial Remineralizer Replacements

    Claryum®, Carbon, & Microbial Remineralizer Replacements for the Clean Water Filter with RO & Microbial Boost. Replace every 6 month or 365 gallons. Use only genuine A. O. Smith replacements with your system.

  • Reverse Osmosis Membrane Replacement

    RO Membrane replacement for the Clean Water Filter with RO & Microbial Boost. Replace every 2 years. Use only genuine A. O. Smith replacements with your system.

Shop Now at Lowe’s

Product Features

  • First Reverse Osmosis system to combine reverse osmosis, advanced Claryum® selective filtration, remineralization, and microbial boost.
  • Maximum Filtration—Reverse Osmosis reduces up to 99% of 90 harmful contaminants including bacteria, viruses, lead, fluoride, chromium, mercury, asbestos, pesticides, pharmaceuticals, and chlorine.
  • Claryum® filtration reduces harmful contaminants—those you can see, smell and taste, and those you can’t—for optimally clean water.
  • Access to clean, filtered water whenever you need it. Perfect for 1-3 people.
  • Remineralizer with Microbial Filtration—returns the healthy minerals lost in the reverse osmosis process—such as calcium, magnesium, and potassium while removing bacteria and viruses.
  • NSF Certified to standards 42, 53, 58, 401 + P473. IAPMO certified and tested to NSF/ANSI standard P231.
  • Carbon & Claryum filters and Remineralizer with Microbial Boost last 6 months or 365 gallons. RO Membrane lasts 12 months.
  • Includes first set of filters, RO tank, brushed nickel faucet, and all parts required for installation.
  • Limited 2-year warranty.

Replacement Filters

  • Claryum®, Carbon, & Microbial Remineralizer Replacements

    Claryum®, Carbon, & Microbial Remineralizer Replacements for the Clean Water Filter with RO & Microbial Boost. Replace every 6 month or 365 gallons. Use only genuine A. O. Smith replacements with your system.

  • Reverse Osmosis Membrane Replacement

    RO Membrane replacement for the Clean Water Filter with RO & Microbial Boost. Replace every 2 years. Use only genuine A. O. Smith replacements with your system.

Product image

How This Model Will Perform In Your Home...

  • Icon

    Maximum

    Filtration Strength
  • Icon

    3-4 People

    Household Size
  • Icon

    Certified

    NSF & IAPMO Certs
  • Icon

    6 Months

    Filter Life - 365 gallons
  • Icon

    $240 or Less

    Annual Maintenance Cost

Not Sure Which Water Filter Is Right For You?

Try our Product Selector Tool to find the right water treatment solution for your home.

Launch Product Selector


  • Product Dimensions

    Reduces Sediment: Yes
    Reduces Turbidity: Yes
    Reduces Cysts: Yes
    Reduces Bacteria: Yes
    Height: 12.5 in.
    Width: 4 in.
    Depth: 12 in.
    Filter Life: 6 months
    Recommended Use: Under Sink
    Capacity Published: 365 gal.
    Flow Rate: 0.5 (Gallons per minute)
    Min. Feed Temp: 40° Fahrenheit
    Max. Feed Temp: 90° Fahrenheit
    Lowes Exclusive: Yes
    Package Contents: Clean Water Filter RO System, First Set of Filters, Water Storage Tank, Brushed Nickel Faucet, Tubing, Fittings
    Faucet Finish: Brushed Nickel
    Warranty: 2 years
    Package Quantity: 1
    Type: Drinking Water Filter
    Product Weight: 20 lbs.

    Configuration and Overview

    Household Size: 2 - 3
    Annual Maintenance Cost: $240
    Contaminants Reduced: 90
    Filtration Method 1: Activated Carbon
    Filtration Method 2: Catalytic Carbon
    Filtration Method 3: Ion Exchange
    Filtration Method 4: Mechanical Filtration
    Filtration Strength: Maximum
    NSF Standard 42: Yes
    NSF Standard 53: Yes
    NSF Standard 58: Yes
    NSF Standard 401: Yes
    NSF Standard P473: Yes
    NSF Standard P231: Yes
    Reduces Chlorine: Yes
    Reduces Chloramine: Yes
    Reduces Lead: Yes
    Reduces Mercury: Yes
    Reduces BPA: Yes
    Reduces PFOA/PFOS: Yes

  • You may need to install Adobe ReaderAdobe Acrobat Reader to view these documents.