---
product_id: 172846906
title: "Max Water 4\" x 40\" BW-4040 / TW30-4040 2400 GPD Brackish Water RO Membrane Perfect for Car Wash, Whole House & Industrial Applications | Compatible with AG4040FF, RE4040-BE and more"
brand: "max water"
price: "€ 265.72"
currency: EUR
in_stock: true
reviews_count: 8
category: "Max Water"
url: https://www.desertcart.nl/products/172846906-max-water-4-x-40-bw-4040-tw30-4040-2400
store_origin: NL
region: Netherlands
---

# 2400 GPD high flow capacity 90 ft² active membrane area 99.5% salt rejection efficiency Max Water 4" x 40" BW-4040 / TW30-4040 2400 GPD Brackish Water RO Membrane Perfect for Car Wash, Whole House & Industrial Applications | Compatible with AG4040FF, RE4040-BE and more

**Brand:** max water
**Price:** € 265.72
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate Your Water Game with Pro-Level Purity & Performance!

## Quick Answers

- **What is this?** Max Water 4" x 40" BW-4040 / TW30-4040 2400 GPD Brackish Water RO Membrane Perfect for Car Wash, Whole House & Industrial Applications | Compatible with AG4040FF, RE4040-BE and more by max water
- **How much does it cost?** € 265.72 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/172846906-max-water-4-x-40-bw-4040-tw30-4040-2400)

## Best For

- max water enthusiasts

## Why This Product

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

## Key Features

- • **Versatile Compatibility:** Fits seamlessly with top models like AG4040FF, RE4040-BE, and more for diverse applications.
- • **Engineered for Durability:** Premium 8-pound TFC membrane built to last 24-36 months under tough conditions.
- • **ISO 9001 Certified Quality:** Manufactured under strict standards ensuring reliable, professional-grade performance.
- • **Unmatched Filtration Power:** Delivers 2400 gallons per day with 99.5% salt rejection for crystal-clear water.
- • **Precision Water Purification:** Filters contaminants down to 0.0001 microns, tackling heavy metals and harmful minerals.

## Overview

Max Water’s 4" x 40" BW-4040 / TW30-4040 RO membrane is a high-capacity, commercial-grade filtration solution engineered in the U.S. It offers 2400 GPD flow, 99.5% salt rejection, and a robust 90 ft² membrane area, designed for brackish water applications like car washes and industrial use. Compatible with leading membrane models and ISO 9001 certified, it ensures long-lasting, contaminant-free water with advanced thin-film composite technology.

## Description

desertcart.com: Max Water 4" x 40" BW-4040 / TW30-4040 2400 GPD Brackish Water RO Membrane Perfect for Car Wash, Whole House & Industrial Applications | Compatible with AG4040FF, RE4040-BE and more : Tools & Home Improvement

Review: Very good quality - I bought these for my reverse osmosis system and it has been working with amazing results.
Review: Works very well. - Works very well. First one lasted almost a year with nasty well water.

## Features

- Premium Commercial Membrane: Our 4040 membrane features an impressive 90 ft² of active membrane area and an optimized 8-pound final product weight, delivering superior durability and performance over inferior alternatives. Expertly engineered by U.S. specialists, this membrane is tailored for North American water quality, ensuring long-lasting and dependable filtration.
- Optimal Purity & Performance: BW-4040 / TW30-4040 Delivering superior filtration, this RO membrane boasts a 99.5% rejection rate, effectively handling salt concentrations between 2000 and 8000 PPM, producing up to 2400 gallons per day, and operating efficiently at an optimum pressure of 600 psi (recommended 100 psi, with a range of 80-150 psi).
- Choosing the Right Membrane: Effectively filter contaminants like heavy metals (fluoride, lead, chromium), and harmful minerals with a 0.0001 micron TFC membrane. Each membrane model is designed for specific water qualities, so understanding your water chemistry, pressure, and ppm is crucial for selection. Keep in mind that this membrane type is not suitable for whole-house filtration; a different setup is required for that purpose. Make sure to choose the appropriate model based on your unique water needs.
- Versatile & High Capacity: Designed for diverse applications such as car washes, whole-house filtration, and industrial use, the BW-4040 membrane offers a reliable capacity of 2,400 GPD, ensuring optimal performance and compatibility with leading models like AG4040FF, RE4040-BE,W30 4040, TW30-4040, AG4040TM, AG4040TF, CPA2-4040 or CPA5-LD-4040 and others, making it a versatile solution for your water purification needs.
- Advanced and Improved Membrane Technology: Our labs in the United States utilize innovative thin film composite (TFC) membrane technology, engineered to provide superior performance and durability for efficient water filtration and desalination.
- ISO 9001 Certified Quality: Our ULP-4040 Membrane meets ISO 9001 standards, ensuring high-quality manufacturing processes and reliable performance for your water purification system.
- Durable & Long-Lasting: Shipped dry in a sealed package to maintain peak condition, the BW-4040 Membrane is built for longevity, with a life expectancy of 24 to 36 months depending on water quality, temperature, and pressure. Constructed with BPA-free components, it ensures that no toxic plastic materials are used, making it safe for all water filtration needs.000 PPM, producing up to 2400 gallons per day, and operating efficiently at an optimum pressure of 600 psi (recommended 100 psi, with a range of 80-150 psi).
- Trusted Expertise: With over 15 years in the water filtration industry, Max Water has delivered effective solutions and exceptional customer service to millions of families. Choose Max Water for reliable, high-quality filtration solutions.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Best Sellers Rank | #63,461 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,335 in Replacement Under-Sink Water Filters |
| Brand | Max Water |
| Customer Reviews | 4.5 out of 5 stars 209 Reviews |
| External Testing Certification | ISO 9001 |
| Item Weight | 8 Pounds |
| Material | Polyamide Thin-Film Composite |
| Product Benefits | Removes impurities, contaminants, and chemicals for cleaner, better-tasting water |
| Product Dimensions | 4"D x 4"W x 40"H |

## Product Details

- **Material:** Polyamide Thin-Film Composite
- **Product Dimensions:** 4"D x 4"W x 40"H
- **Item Weight:** 8 Pounds
- **External Testing Certification:** ISO 9001
- **Product Benefits:** Removes impurities, contaminants, and chemicals for cleaner, better-tasting water

## Images

![Max Water 4" x 40" BW-4040 / TW30-4040 2400 GPD Brackish Water RO Membrane Perfect for Car Wash, Whole House & Industrial Applications | Compatible with AG4040FF, RE4040-BE and more - Image 1](https://m.media-amazon.com/images/I/41DwWhcZVPL.jpg)
![Max Water 4" x 40" BW-4040 / TW30-4040 2400 GPD Brackish Water RO Membrane Perfect for Car Wash, Whole House & Industrial Applications | Compatible with AG4040FF, RE4040-BE and more - Image 2](https://m.media-amazon.com/images/I/71UIR317ZOL.jpg)
![Max Water 4" x 40" BW-4040 / TW30-4040 2400 GPD Brackish Water RO Membrane Perfect for Car Wash, Whole House & Industrial Applications | Compatible with AG4040FF, RE4040-BE and more - Image 3](https://m.media-amazon.com/images/I/71a48-BOHmL.jpg)
![Max Water 4" x 40" BW-4040 / TW30-4040 2400 GPD Brackish Water RO Membrane Perfect for Car Wash, Whole House & Industrial Applications | Compatible with AG4040FF, RE4040-BE and more - Image 4](https://m.media-amazon.com/images/I/71r1furkphL.jpg)
![Max Water 4" x 40" BW-4040 / TW30-4040 2400 GPD Brackish Water RO Membrane Perfect for Car Wash, Whole House & Industrial Applications | Compatible with AG4040FF, RE4040-BE and more - Image 5](https://m.media-amazon.com/images/I/818FmSyKmUL.jpg)

## Available Options

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

## Questions & Answers

**Q: Isn't there supposed to be 2 black o rings for the membrane?**
A: As far as I know, the membrane doesn't come with o rings. If you buy the housing it does come with the o rings.

**Q: Can a 2.5" x 40 membrane be used in this housing?**
A: No only 4x40

**Q: Is this the housing only or the Membrane too?**
A: It is the housing only.

**Q: Cual es el máximo Tds de trabajo para esta membrana?**
A: Concentration of Solution - maximim 2000 ppm

## Customer Reviews

### ⭐⭐⭐⭐⭐ Very good quality
*by A***L on July 7, 2025*

I bought these for my reverse osmosis system and it has been working with amazing results.

### ⭐⭐⭐⭐⭐ Works very well.
*by G***A on October 8, 2025*

Works very well. First one lasted almost a year with nasty well water.

### ⭐⭐⭐⭐⭐ Less water usage
*by R***Y on October 23, 2025*

A lot more RO Water, and less water sent down the drain. Replace the 21 inch.

## Frequently Bought Together

- Max Water 4" x 40" BW-4040 2400 GPD Brackish Water RO Membrane Perfect for Car Wash, Whole House & Industrial Applications | Compatible with AG4040FF, RE4040-BE and more for Versatile Water Solutions
- SimPure 5 Micron 10 x 4.5 Inch Whole House Carbon Water Filter | CTO Activated Coconut Carbon Replacement Cartridge | Fits DB10P, DB10C-2, GE GXWH40L, GXWH35F, BB10, FXHTC, FC15B (2Pack)

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-01-28*