---
product_id: 354304694
title: "AO SmithReverse Osmosis Membrane Replacement for AO-US-RO-MB-4000, 1 Count"
brand: "ao smith"
price: "S$407"
currency: SGD
in_stock: true
url: https://www.desertcart.sg/products/354304694-ao-smithreverse-osmosis-membrane-replacement-for-ao-us-ro-mb
store_origin: SG
region: Singapore
---

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

**Brand:** ao smith
**Price:** S$407
**Availability:** ✅ In Stock

## Summary

> 💦 Drink Smart, Live Well!

## Quick Answers

- **What is this?** AO SmithReverse Osmosis Membrane Replacement for AO-US-RO-MB-4000, 1 Count by ao smith
- **How much does it cost?** S$407 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/354304694-ao-smithreverse-osmosis-membrane-replacement-for-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

- • **Durable Design:** Crafted from high-quality polycarbonate for long-lasting performance and reliability.
- • **Certified Quality:** Rest easy knowing your water is filtered through a membrane tested and certified to NSF/ANSI standard 58.
- • **Easy Installation:** Designed for seamless integration with your existing Clean Water Machine—just swap and sip!
- • **Sustainable Choice:** Make a positive impact on your health and the environment with this eco-friendly water solution.
- • **Pure Water, Pure Life:** Experience the ultimate in water purification with a membrane that reduces up to 99% of harmful contaminants.

## Overview

The AO Smith Reverse Osmosis Membrane Replacement (AO-US-RO-MB-4000) is engineered to provide superior water filtration, effectively reducing up to 99% of harmful contaminants like lead and fluoride. This durable membrane lasts approximately one year and is certified to NSF/ANSI standard 58, ensuring you enjoy clean, safe drinking water with every sip.

## Description

AO SmithReverse Osmosis Membrane Replacement for AO-US-RO-MB-4000, 1 Count

## 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 |
|---------------|-------|
| Manufacturer | AO Smith |
| Product Dimensions | 7.49 x 7.24 x 7.11 cm; 481 g |
| Item model number | AO-US-RO-MB-4000 |
| Size | 1 Count (Pack of 1) |
| Colour | Black |
| Material | Polycarbonate (PC) |
| Item Package Quantity | 1 |
| Batteries included? | No |
| Batteries Required? | No |
| Item Weight | 481 g |

## Product Details

- **Material:** Polycarbonate (PC)
- **Product dimensions:** 7.5D x 7.2W x 7.1H centimetres
- **Item weight:** 481 g
- **External testing certification:** IAPMO, ANSI, NSF
- **Product benefits:** Clean,Reduces Up

## Images

![AO SmithReverse Osmosis Membrane Replacement for AO-US-RO-MB-4000, 1 Count - Image 1](https://m.media-amazon.com/images/I/7118X51-bAL.jpg)
![AO SmithReverse Osmosis Membrane Replacement for AO-US-RO-MB-4000, 1 Count - Image 2](https://m.media-amazon.com/images/I/71CcZTj-hmL.jpg)
![AO SmithReverse Osmosis Membrane Replacement for AO-US-RO-MB-4000, 1 Count - Image 3](https://m.media-amazon.com/images/I/712sxIAyOZL.jpg)
![AO SmithReverse Osmosis Membrane Replacement for AO-US-RO-MB-4000, 1 Count - Image 4](https://m.media-amazon.com/images/I/81oku1lMGQL.jpg)
![AO SmithReverse Osmosis Membrane Replacement for AO-US-RO-MB-4000, 1 Count - Image 5](https://m.media-amazon.com/images/I/61cEGbgkLWL.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

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.sg/products/354304694-ao-smithreverse-osmosis-membrane-replacement-for-ao-us-ro-mb](https://www.desertcart.sg/products/354304694-ao-smithreverse-osmosis-membrane-replacement-for-ao-us-ro-mb)

---

*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-01-29*