---
product_id: 170412286
title: "Reverse Osmosis Membrane Replacement for the AO-US-RO-MB-4000 - Not Compatible with SmartFlow Systems"
brand: "ao smith"
price: "₩202785"
currency: KRW
in_stock: true
url: https://www.desertcart.kr/products/170412286-reverse-osmosis-membrane-replacement-for-the-ao-us-ro-mb
store_origin: KR
region: South Korea
---

# 1-year membrane lifespan 99% contaminant reduction NSF/ANSI Standard 58 certified Reverse Osmosis Membrane Replacement for the AO-US-RO-MB-4000 - Not Compatible with SmartFlow Systems

**Brand:** ao smith
**Price:** ₩202785
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your hydration game with pro-level purity!

## Quick Answers

- **What is this?** Reverse Osmosis Membrane Replacement for the AO-US-RO-MB-4000 - Not Compatible with SmartFlow Systems by ao smith
- **How much does it cost?** ₩202785 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/170412286-reverse-osmosis-membrane-replacement-for-the-ao-us-ro-mb)

## Best For

- ao smith enthusiasts

## Why This Product

- Trusted ao smith brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Eco-Smart Installation:** Reuse your existing 90-degree elbow connection—less waste, more efficiency.
- • **Seamless Compatibility:** Designed exclusively for AO-US-RO-MB-4000—no SmartFlow system confusion here.
- • **Engineered for Endurance:** Reliable 1-year lifespan keeps your water fresh without frequent replacements.
- • **Certified Safety Assurance:** IAPMO tested and NSF/ANSI 58 certified for trusted, professional-grade filtration.
- • **Pure Water, Zero Compromise:** Eliminates up to 99% of lead, fluoride, arsenic & more for crystal-clear hydration.

## Overview

This Reverse Osmosis Membrane Replacement is specifically designed for the AO-US-RO-MB-4000 system, reducing up to 99% of harmful contaminants including lead, fluoride, and arsenic. It offers a reliable 1-year lifespan and meets rigorous NSF/ANSI Standard 58 certification, ensuring professional-grade water filtration. Note: Not compatible with SmartFlow systems and requires reuse of the existing 90-degree elbow connection.

## Description

Reverse Osmosis Membrane Replacement for the AO-US-RO-MB-4000 - Not Compatible with SmartFlow Systems

## Features

- Replacement Reverse Osmosis Membrane for: The Clean Water Machine with RO & Microbial Boost (AO-US-RO-MB-4000). Not Compatible with SmartFlow Systems.
- Reduces up to 99% of harmful contaminants including lead, fluoride, arsenic, chromium, nitrates, and more.
- RO Membrane lasts approximately 1 year. Does NOT include 90 degree elbow connection to drain. Please use existing 90 degree elbow to connect the remineralizer to the drain line. Do NOT discard the connector with the old membrane.
- IAPMO tested to NSF/ANSI Standard 58.

## Product Details

- **Material:** Polycarbonate (PC)
- **Product Dimensions:** 2.95"D x 2.85"W x 2.8"H
- **Item Weight:** 1.06 Pounds
- **External Testing Certification:** IAPMO, ANSI, NSF
- **Product Benefits:** Removes Lead, Reduces Fluoride, Removes Arsenic, Reduces Chromium, Reduces Nitrate

## Images

![Reverse Osmosis Membrane Replacement for the AO-US-RO-MB-4000 - Not Compatible with SmartFlow Systems - Image 1](https://m.media-amazon.com/images/I/7118X51-bAL.jpg)

## Questions & Answers

**Q: Can this replace the brita redi twist e filter?**
A: I would imagine that Brita has a manual that specified what parts you need.  This membrane is for a Reverse Osmosis system made by AO Smith.  I doubt it would work on any other system.

**Q: Will this filter work on a Culligan water aqua clear reverse osmosis**
A: No it will not. It is brand specific.

## Frequently Bought Together

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**Shop now:** [https://www.desertcart.kr/products/170412286-reverse-osmosis-membrane-replacement-for-the-ao-us-ro-mb](https://www.desertcart.kr/products/170412286-reverse-osmosis-membrane-replacement-for-the-ao-us-ro-mb)

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-03-13*