---
product_id: 81894987
title: "Dow Filmtec BW30-4040 Brackish Water Industrial Reverse Osmosis Membrane"
brand: "dow filmtec"
price: "A$779"
currency: AUD
in_stock: true
reviews_count: 2
category: "Dow Filmtec"
url: https://www.desertcart.com.au/products/81894987-dow-filmtec-bw30-4040-brackish-water-industrial-reverse-osmosis-membrane
store_origin: AU
region: Australia
---

# Max pressure drop 15 psig Wide pH cleaning range (1-13) Industry's thickest 34 mil feed spacer Dow Filmtec BW30-4040 Brackish Water Industrial Reverse Osmosis Membrane

**Brand:** dow filmtec
**Price:** A$779
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your water filtration game with industrial-grade precision!

## Quick Answers

- **What is this?** Dow Filmtec BW30-4040 Brackish Water Industrial Reverse Osmosis Membrane by dow filmtec
- **How much does it cost?** A$779 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/81894987-dow-filmtec-bw30-4040-brackish-water-industrial-reverse-osmosis-membrane)

## Best For

- dow filmtec enthusiasts

## Why This Product

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

## Key Features

- • **Versatile Cleaning Power:** Clean across extreme pH levels (1-13) to maintain peak performance
- • **Durability Meets Efficiency:** Polyamide thin-film composite ensures robust filtration without compromise
- • **Trusted Industrial Standard:** NSF certified and proven in multi-membrane housings for consistent results
- • **Unmatched Fouling Resistance:** Thick 34 mil feed spacer minimizes clogging for longer life
- • **Built for High-Pressure Systems:** Hard shell design withstands up to 15 psig pressure drop

## Overview

The Dow Filmtec BW30-4040 is a high-performance brackish water reverse osmosis membrane designed for light industrial use. Featuring the industry's thickest 34 mil feed spacer, it reduces fouling and extends membrane life. Its hard shell exterior supports multi-element housings and withstands pressure drops up to 15 psig. With a broad cleaning pH range of 1-13 and NSF certification, it delivers reliable, durable filtration for demanding environments.

## Description

Product Description The Dow Filmtec BW30-4040 brackish water reverse osmosis membrane elements provide consistent and outstanding system performance in light industrial applications. Elements with a hard shell exterior are recommended for systems with multiple-element housings containing three or more membranes, as they are designed to withstand higher pressure drops. From the Manufacturer The Dow Filmtec BW30-4040 brackish water reverse osmosis membrane elements provide consistent and outstanding system performance in light industrial applications. Elements with a hard shell exterior are recommended for systems with multiple-element housings containing three or more membranes, as they are designed to withstand higher pressure drops.

Review: Great filter - Return customers. Great product for a great price! Will order again.
Review: Good product - Good product

## Features

- Features the industry's thickest feed spacer (34 mil), which lessens the impact of fouling
- May be cleaned over a wide range of pH levels (pH 1-13) for maximum cleaning effectiveness
- Maximum Pressure Drop: 15 psig
- Free Chlorine Tolerance: <0.1 ppm

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00D43H4WC |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #672,692 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #4,022 in Replacement Under-Sink Water Filters |
| Brand | Dow Filmtec |
| Color | Yellow |
| Customer Reviews | 4.1 4.1 out of 5 stars (7) |
| Date First Available | November 10, 2009 |
| External Testing Certification | NSF |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 7 pounds |
| Item model number | FILMTEC-BW30-4040 |
| Manufacturer | Dow Filmtec |
| Material | Polyamide Thin-Film Composite |
| Number of Items | 1 |
| Part Number | CWD-FILMTEC-BW30-4040 |
| Product Benefits | Offers improved performance, enhanced cleaning capabilities, and durability in various conditions. |
| Product Dimensions | 40 x 4 x 4 inches |
| Size | Single |
| Temperature Range | 113 Degrees Fahrenheit |
| UPC | 701003117848 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** Dow Filmtec
- **External Testing Certification:** NSF
- **Item Weight:** 7 Pounds
- **Material:** Polyamide Thin-Film Composite
- **Product Benefits:** Offers improved performance, enhanced cleaning capabilities, and durability in various conditions.

## Images

![Dow Filmtec BW30-4040 Brackish Water Industrial Reverse Osmosis Membrane - Image 1](https://m.media-amazon.com/images/I/61GgFxG4QQL.jpg)
![Dow Filmtec BW30-4040 Brackish Water Industrial Reverse Osmosis Membrane - Image 2](https://m.media-amazon.com/images/I/614dYgcHbvL.jpg)
![Dow Filmtec BW30-4040 Brackish Water Industrial Reverse Osmosis Membrane - Image 3](https://m.media-amazon.com/images/I/615gpXznlEL.jpg)
![Dow Filmtec BW30-4040 Brackish Water Industrial Reverse Osmosis Membrane - Image 4](https://m.media-amazon.com/images/I/61jiv47zjgL.jpg)
![Dow Filmtec BW30-4040 Brackish Water Industrial Reverse Osmosis Membrane - Image 5](https://m.media-amazon.com/images/I/51PN1V-3lLL.jpg)

## Questions & Answers

**Q: What pressure is this designed to operate?**
A: 225 psi

**Q: Weight of each membrane in a box**
A: 10 lbs

**Q: What pressure is this designed for? My system is 225 psi?**
A: 225

**Q: is it membrane only or entire assembly including house, spacer and seal?**
A: Just the membrane.  The housing is separate.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great filter
*by J***. on May 2, 2025*

Return customers. Great product for a great price! Will order again.

### ⭐⭐⭐⭐⭐ Good product
*by A***R on April 23, 2019*

Good product

## Frequently Bought Together

- Dow Filmtec BW30-4040 Brackish Water Industrial Reverse Osmosis Membrane
- lesolar 4040 Ro Membrane RO Membrane Housing 4 Inch Commercial Reverse Osmosis Membrane Housing 304 Stainless Steel Pressure Vessel 4"x40" 300 PSI 3/4" Feed and Drain Ports 1/4" Permeate Ports

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**Shop now:** [https://www.desertcart.com.au/products/81894987-dow-filmtec-bw30-4040-brackish-water-industrial-reverse-osmosis-membrane](https://www.desertcart.com.au/products/81894987-dow-filmtec-bw30-4040-brackish-water-industrial-reverse-osmosis-membrane)

---

*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-03-14*