---
product_id: 386740611
title: "Reverse Osmosis Membrane Replacement for AO-US-RO-MB-4000, 1 Count"
brand: "ao smith"
price: "RM1066"
currency: MYR
in_stock: true
reviews_count: 5
category: "Ao Smith"
url: https://www.desertcart.com.my/products/386740611-reverse-osmosis-membrane-replacement-for-ao-us-ro-mb-4000
store_origin: MY
region: Malaysia
---

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

**Brand:** ao smith
**Price:** RM1066
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** Reverse Osmosis Membrane Replacement for AO-US-RO-MB-4000, 1 Count by ao smith
- **How much does it cost?** RM1066 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.my](https://www.desertcart.com.my/products/386740611-reverse-osmosis-membrane-replacement-for-ao-us-ro-mb-4000)

## 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

- • **Optimize Your Flow:** Pro tip: Maintain your system’s pressure for peak water flow and freshness.
- • **Seamless Compatibility:** Specifically crafted for AO-US-RO-MB-4000 with easy integration using existing fittings.
- • **Engineered for Endurance:** Durable membrane designed to last a full year without compromising performance.
- • **Certified Safety Assurance:** IAPMO tested and NSF/ANSI 58 certified for trusted, professional-grade filtration.
- • **Pure Water, Pure Confidence:** Eliminates up to 99% of lead, fluoride, arsenic & more for crystal-clear hydration.

## Overview

The AO Smith Reverse Osmosis Membrane Replacement (AO-US-RO-MB-4000) is a high-performance water filter cartridge that reduces up to 99% of harmful contaminants including lead, fluoride, arsenic, chromium, and nitrates. Certified to NSF/ANSI Standard 58, this durable polycarbonate membrane lasts approximately one year and is designed for seamless replacement in AO Smith’s Clean Water Machine with RO & Microbial Boost systems. Ideal for professionals seeking reliable, clean water filtration with proven safety standards.

## Description

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

Review: Works for what it is intended to.
Review: There's mixed reviews as to whether this filter fits the pure Blue H2O system from Costco . It fit mine with minimal modification as others suggested. Just remove the triangle tab on top of the filter. I bought new filters for the system thinking they were the cause of the slow flow rate of water, in the process I discovered that my water tank was low on pressure and had to simply add air to the system through the valve stem. It fills up just like a bicycle tire. Worth checking while you're working on the system, you can find many YouTube videos on it. My system was due for new filters anyway and this was my only option left for the R. O. filter. Glad it worked! Hope this helps others as well.

## Features

- Replacement Reverse Osmosis Membrane for: The Clean Water Machine with RO & Microbial Boost (AO-US-RO-MB-4000).
- 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 and certified to NSF/ANSI standard 58.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07PVZG45X |
| Brand | AO Smith |
| Color | Black |
| Customer Reviews | 4.5 4.5 out of 5 stars (218) |
| Date First Available | 18 April 2019 |
| Item Weight | 481 g |
| Material | Polycarbonate (PC) |
| Model Number | AO-US-RO-MB-4000 |
| Product Dimensions | 7.49 x 7.24 x 7.11 cm; 481 g |

## Product Details

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

## Images

![Reverse Osmosis Membrane Replacement for AO-US-RO-MB-4000, 1 Count - 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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by C***S on 11 November 2025*

Works for what it is intended to.

### ⭐⭐⭐⭐⭐ Review
*by A***R on 9 February 2025*

There's mixed reviews as to whether this filter fits the pure Blue H2O system from Costco . It fit mine with minimal modification as others suggested. Just remove the triangle tab on top of the filter. I bought new filters for the system thinking they were the cause of the slow flow rate of water, in the process I discovered that my water tank was low on pressure and had to simply add air to the system through the valve stem. It fills up just like a bicycle tire. Worth checking while you're working on the system, you can find many YouTube videos on it. My system was due for new filters anyway and this was my only option left for the R. O. filter. Glad it worked! Hope this helps others as well.

### ⭐⭐⭐⭐⭐ Review
*by C***A on 14 October 2025*

Easy to install, no leakage, good water flow, good quality, no smell

## 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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*Product available on Desertcart Malaysia*
*Store origin: MY*
*Last updated: 2026-03-02*