---
product_id: 43372596
title: "Hydron BW-4040 Reverse Osmosis Membrane – 4\" x 40\", 2400 GPD | High Performance for Commercial, Industrial, Agricultural, Whole House | Compatible with AG4040FF, AG4040TF, TW30-4040, RE4040-BE"
brand: "hydronix"
price: "S$413"
currency: SGD
in_stock: true
reviews_count: 11
category: "Hydronix"
url: https://www.desertcart.sg/products/43372596-hydron-bw-4040-reverse-osmosis-membrane-4-x-40-2400
store_origin: SG
region: Singapore
---

# 2400 GPD high flow rate Universal compatibility 99% salt & impurity rejection Hydron BW-4040 Reverse Osmosis Membrane – 4" x 40", 2400 GPD | High Performance for Commercial, Industrial, Agricultural, Whole House | Compatible with AG4040FF, AG4040TF, TW30-4040, RE4040-BE

**Brand:** hydronix
**Price:** S$413
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your water game with pro-grade purity and performance!

## Quick Answers

- **What is this?** Hydron BW-4040 Reverse Osmosis Membrane – 4" x 40", 2400 GPD | High Performance for Commercial, Industrial, Agricultural, Whole House | Compatible with AG4040FF, AG4040TF, TW30-4040, RE4040-BE by hydronix
- **How much does it cost?** S$413 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/43372596-hydron-bw-4040-reverse-osmosis-membrane-4-x-40-2400)

## Best For

- hydronix enthusiasts

## Why This Product

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

## Key Features

- • **Eco-Smart Efficiency:** Certified NSF/ANSI for energy-saving filtration that cuts costs and carbon footprint.
- • **Elite 99% Salt Rejection:** Effectively removes salts, heavy metals, and over 100 contaminants for pristine water.
- • **Versatile for Every Need:** Perfect for whole house, commercial, agricultural, and industrial water purification setups.
- • **Plug & Play Compatibility:** Seamlessly fits top RO systems like AG4040FF, TW30-4040, and more—no hassle swaps.
- • **Unmatched Purification Power:** Delivers a robust 2,400 gallons per day for relentless water clarity.

## Overview

The Hydron BW-4040 Reverse Osmosis Membrane is a high-capacity, 4"x40" filtration powerhouse delivering 2,400 gallons per day with 99% salt rejection. Compatible with major RO systems, it ensures superior water quality across residential, commercial, and industrial applications while being energy-efficient and NSF-certified for trusted performance.

## Description

Hydron BW-4040 Reverse Osmosis Membrane – 4" x 40", 2400 GPD | High Performance for Commercial, Industrial, Agricultural, Whole House | Compatible with AG4040FF, AG4040TF, TW30-4040, RE4040-BE: desertcart.com: Tools & Home Improvement

Review: 2.5 year review - I bought this in March 2023 and it has met expectations. There was a noticeable improvement as soon as I replaced the old one with this new one. Since this purchase I have ordered an additional one to swap out with the second part of my House RO system
Review: Fast delivery Easy to install Great price - Membrane was delivered quickly and in good shape. FIrst time changing on my own. Was easy to pull old and insert new. Tested water quality in PPM. Before with old membrane was 65ppm asfterwards showed 45 ppm. Perfectly in range as it should be. Price was great compared to $800 water companie wanted to come change my RO membrane. WIll definitely be ordering an extra to have on hand.

## Features

- ⭐ High Performance - The Hydron BW-4040 Reverse Osmosis Membrane delivers a high flow rate of 2,400 gallons per day, ensuring consistent and effective desalination for a variety of applications and industries requiring large volumes of purified water.
- ✔️ 99% Desalination Rate - With an impressive 99% salt rejection rate, it effectively removes dissolved salts (TOC and SIO2), hundreds of impurities including chemicals, heavy metals (fluoride, magnesium, lead, colloids and nitrates) and harmful minerals from the water, delivering exceptionally high water quality.
- 💧 Versatile Applications - Ideal for a range of uses, including residential, commercial, industrial and agricultural setups as well as whole house systems, car washes and reverse osmosis systems. This membrane provides superior water purification for diverse needs.
- 🔧 Universal Compatibility - Compatible with popular models such as BW30-4040, BW-4040, AG4040FF, AG4040TF, TW30-4040, and RE4040-BE0. It also replaces Axeon HF1-4040, HF6-4040; DuPont DOW FilmTec LE-4040, LP-4040; GE/Desal AK4040TM; and Toray TMG10 – as well as most other industry-standard "stinger style" 4" x 40" Size RO System.
- 🌱 Eco-Friendly & Cost-Effective - Certified to NSF/ANSI standards, the BW-4040 is designed for energy efficiency, using less electricity to produce purified water when compared to other membranes, resulting in cost savings and reduced environmental impact.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01CFOGPXY |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #196,888 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,358 in Replacement Under-Sink Water Filters |
| Brand | Hydronix |
| Customer Reviews | 4.5 4.5 out of 5 stars (123) |
| Date First Available | March 1, 2016 |
| External Testing Certification | NSF |
| Global Trade Identification Number | 00693614030008 |
| Included Components | Membrane to Membrane Coupler |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 7 pounds |
| Item model number | BW-4040 |
| Manufacturer | Hydron |
| Material | Fiberglass, Polyamide Thin-Film Composite |
| Measurement System | US |
| Number of Items | 1 |
| Part Number | BW-4040 |
| Product Benefits | Provides high-volume, high-purity water filtration for diverse applications |
| Product Dimensions | 4"D x 40"W x 4"H |
| Set Name | AG4040FF, AG4040TF, TW30-4040, RE4040-BE |
| Size | 4 Count (Pack of 1) |
| Style | Replacement Under-Sink Water Filters |
| UPC | 693614030008 |
| Unit Count | 1.0 Count |

## Product Details

- **External Testing Certification:** NSF
- **Item Weight:** 7 Pounds
- **Material:** Fiberglass, Polyamide Thin-Film Composite
- **Product Benefits:** Provides high-volume, high-purity water filtration for diverse applications
- **Product Dimensions:** 4"D x 40"W x 4"H

## Images

![Hydron BW-4040 Reverse Osmosis Membrane – 4" x 40", 2400 GPD | High Performance for Commercial, Industrial, Agricultural, Whole House | Compatible with AG4040FF, AG4040TF, TW30-4040, RE4040-BE - Image 1](https://m.media-amazon.com/images/I/51uOVPH8wfL.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: Is this filter for low pressure ro system or hi pressure systems?**
A: Permeate production is pretty much linear with pressure. I run mine at 80 to 100 psi and get 2.5 gpm from a two stage system - a total of three membranes. So far I am very pleased with the Hydron BW 4040 s.

**Q: Is there a 2.5”X40” membrane?**
A: Yes

**Q: Is overnight shipping available**
A: Possibly

**Q: Can you town water through this ro?**
A: Yes

## Customer Reviews

### ⭐⭐⭐⭐⭐ 2.5 year review
*by M***S on August 11, 2025*

I bought this in March 2023 and it has met expectations. There was a noticeable improvement as soon as I replaced the old one with this new one. Since this purchase I have ordered an additional one to swap out with the second part of my House RO system

### ⭐⭐⭐⭐⭐ Fast delivery Easy to install Great price
*by G***L on August 18, 2025*

Membrane was delivered quickly and in good shape. FIrst time changing on my own. Was easy to pull old and insert new. Tested water quality in PPM. Before with old membrane was 65ppm asfterwards showed 45 ppm. Perfectly in range as it should be. Price was great compared to $800 water companie wanted to come change my RO membrane. WIll definitely be ordering an extra to have on hand.

### ⭐⭐⭐⭐⭐ 99% TDS Reduction !!!
*by H***S on February 23, 2025*

Finally installed this membrane after buying it 6 months ago. My RO system operates only on city water pressure (no booster pump). Feeding softened city water with ~550 ppm of TDS, and using a very low ~1.5x reject vs permeate flow to minimize water waste. This membrane is generating >900 ppm TDS in the reject stream and 5-8 ppm TDS in the permeate. Astounding performance !!!

## Frequently Bought Together

- Hydron BW-4040 Reverse Osmosis Membrane – 4" x 40", 2400 GPD | High Performance for Commercial, Industrial, Agricultural, Whole House | Compatible with AG4040FF, AG4040TF, TW30-4040, RE4040-BE
- Max Water - Heavy Duty - Reverse Osmosis 4040 Membrane Housing - 4" x 40" good for industrial use - 4040 housing
- End Cap with 2 O-Rings for 4" Stainless Steel RO Membrane Housing

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-03-07*