---
product_id: 386740611
title: "AO Smith Reverse Osmosis Membrane Replacement for AO-US-RO-MB-4000, 1 Count"
brand: "ao smith"
price: "HK$1769"
currency: HKD
in_stock: false
category: "Ao Smith"
url: https://www.desertcart.hk/products/386740611-ao-smith-reverse-osmosis-membrane-replacement-for-ao-us-ro
store_origin: HK
region: Hong Kong
---

# 1-year membrane lifespan 99% contaminant reduction NSF/ANSI Standard 58 certified AO Smith Reverse Osmosis Membrane Replacement for AO-US-RO-MB-4000, 1 Count

**Brand:** ao smith
**Price:** HK$1769
**Availability:** ❌ Out of Stock

## Summary

> 💧 Elevate your hydration game with AO Smith’s elite RO membrane!

## Quick Answers

- **What is this?** AO Smith Reverse Osmosis Membrane Replacement for AO-US-RO-MB-4000, 1 Count by ao smith
- **How much does it cost?** HK$1769 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/386740611-ao-smith-reverse-osmosis-membrane-replacement-for-ao-us-ro)

## 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

- • **Seamless Upgrade:** Direct replacement for AO-US-RO-MB-4000 with easy installation—keep your existing drain connector.
- • **Compact & Durable:** Sleek polycarbonate design fits perfectly while standing up to daily use.
- • **Certified Confidence:** IAPMO tested and NSF/ANSI 58 certified for trusted, industry-leading water safety.
- • **Pure Water, Pure Power:** Eliminates up to 99% of lead, fluoride, arsenic & more for crystal-clear hydration.
- • **Long-Lasting Performance:** Engineered to deliver a full year of premium filtration without compromise.

## Overview

The AO Smith Reverse Osmosis Membrane Replacement (AO-US-RO-MB-4000) is a high-performance water filter cartridge designed to reduce up to 99% of harmful contaminants including lead, fluoride, arsenic, chromium, and nitrates. Certified to NSF/ANSI Standard 58 and IAPMO tested, it ensures safe, clean water for approximately one year. Compatible with the Clean Water Machine with RO & Microbial Boost, it requires no new drain connector, making replacement hassle-free.

## Description

AO Smith Reverse Osmosis Membrane Replacement for AO-US-RO-MB-4000, 1 Count : desertcart.ae: Tools & Home Improvement

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | AO Smith |
| Model Number | AO-US-RO-MB-4000 |
| Color | Black |
| Product Dimensions | 7.49 x 7.24 x 7.11 cm; 481 g |
| Material | Polycarbonate (PC) |
| Item Weight | 481 g |

## Product Details

- **Material:** Polycarbonate (PC)
- **Item weight:** 481 g
- **External testing certification:** IAPMO, ANSI, NSF
- **Product benefits:** Clean,Reduces Up
- **Brand:** AO Smith

## Images

![AO Smith Reverse Osmosis Membrane Replacement for AO-US-RO-MB-4000, 1 Count - Image 1](https://m.media-amazon.com/images/I/51YQGeEeoaL.jpg)
![AO Smith Reverse Osmosis Membrane Replacement for AO-US-RO-MB-4000, 1 Count - Image 2](https://m.media-amazon.com/images/I/51pup5RUksL.jpg)
![AO Smith Reverse Osmosis Membrane Replacement for AO-US-RO-MB-4000, 1 Count - Image 3](https://m.media-amazon.com/images/I/61cEGbgkLWL.jpg)
![AO Smith Reverse Osmosis Membrane Replacement for AO-US-RO-MB-4000, 1 Count - Image 4](https://m.media-amazon.com/images/I/7118X51-bAL.jpg)
![AO Smith Reverse Osmosis Membrane Replacement for AO-US-RO-MB-4000, 1 Count - Image 5](https://m.media-amazon.com/images/I/712sxIAyOZL.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

- Reverse Osmosis Membrane Replacement for The AO-US-RO-MB-4000 - Not Compatible with SmartFlow Systems
- Claryum®, Carbon, & Microbial Remineralizer Replacements for The AO-US-RO-MB-4000 - Not Compatible with SmartFlow Systems
- Carbon & Claryum® Filter Replacements for the AO-US-RO-4000 - Not Compatible with SmartFlow Systems

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**Shop now:** [https://www.desertcart.hk/products/386740611-ao-smith-reverse-osmosis-membrane-replacement-for-ao-us-ro](https://www.desertcart.hk/products/386740611-ao-smith-reverse-osmosis-membrane-replacement-for-ao-us-ro)

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-01-27*