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Reverse Osmosis Membrane for AO-US-RO-MB-4000 (Not compatible with SmartFlow)

AO Smith ★ 3.7/5 · ItemOracle Score Mid-Range

$80 USD
Price subject to change
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Reverse Osmosis Membrane Replacement for the AO-US-RO-MB-4000 - Not Compatible with SmartFlow Systems

Replacement RO membrane for AO Smith system with RO & Microbial Boost. Reduces up to 99% of contaminants including lead, fluoride, arsenic, chromium, and nitrates. Users note easy installation and good value, with mixed durability feedback

Highlights

  • multi-contaminant reduction
  • easy installation
  • compatibility with older systems

Pros

  • reduces multiple contaminants
  • easy to install
  • good value for money
  • compatible with out-of-production systems

Cons

  • durability concerns (o-ring issue reported)

Best For

  • home water purification
  • replacement part for under-sink filters
  • systems with RO & microbial boost features
  • legacy AO Smith RO setups
  • contaminant reduction

Features

  • Replacement RO membrane for AO-US-RO-MB-4000 system
  • Removes up to 99% of lead and common contaminants
  • Covers fluoride, arsenic, chromium, nitrates, and more
  • Membrane life approximately one year; does not include 90° drain elbow
  • IAPMO tested to NSF/ANSI Standard 58

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