--- 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" brand: "max water" price: "€ 259.12" currency: EUR in_stock: true reviews_count: 12 category: "Max Water" url: https://www.desertcart.hr/products/172846906-max-water-4-x-40-bw-4040-tw30-4040-2400 store_origin: HR region: Croatia --- # 2400 GPD capacity 90 ft² membrane area 99.5% salt rejection Max Water 4" x 40" BW-4040 / TW30-4040 2400 GPD Brackish Water RO Membrane Perfect for Car Wash, Whole House & Industrial Applications **Brand:** max water **Price:** € 259.12 **Availability:** ✅ In Stock ## Summary > 💧 Elevate your water game with pro-grade filtration power! ## 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 by max water - **How much does it cost?** € 259.12 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/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 - • **Safe & Sustainable:** BPA-free materials shipped dry to preserve peak condition and purity. - • **Versatile Compatibility:** Fits top models like AG4040FF, RE4040-BE, and more for seamless integration. - • **Engineered for Durability:** Premium 90 ft² TFC membrane built to last 24-36 months under tough conditions. - • **ISO 9001 Certified Quality:** Manufactured under strict standards ensuring reliable, consistent performance. - • **Unmatched Filtration Power:** Delivers 2400 gallons/day with 99.5% salt rejection for crystal-clear water. ## Overview Max Water’s BW-4040 / TW30-4040 RO membrane is a high-capacity, commercial-grade filtration solution designed for brackish water applications including car washes, whole-house, and industrial use. Featuring a 90 ft² polyamide thin-film composite membrane, it delivers up to 2400 gallons per day with 99.5% salt rejection, optimized for North American water quality. Built for durability and certified ISO 9001, this BPA-free membrane ensures long-lasting, safe, and efficient water purification compatible with leading industry models. ## Description About Our Mission: Our journey started with a simple belief: clean water is a basic necessity. Since 2007, Max Water has been on a mission to bring reliable filtration to every home. About Our Passion: We are passionate about making your life easier with hassle-free water filtration, and it's our joy to see you smile. About Our Mission Our journey started with a simple belief: clean water is a basic necessity. Since 2007, Max Water has been on a mission to bring reliable filtration to every home. About Our Passion We are passionate about making your life easier with hassle-free water filtration, and it's our joy to see you smile. SOLUTION FOR BETTER LIVING Shop Our RO System Visit the Store Shop Our RO System Visit the Store Shop Our Whole House System Visit the Store Shop Our Whole House System Shop Our Aquarium System Visit the Store Shop Our Aquarium System Shop Commercial RO Membranes Visit the Store Shop Commercial RO Membranes Review: Excellent Membrane for brackish water - This product is excellent i got it on time like they say and in order no damages I'm a happy customer and will purchase again and will recommend this product to family and friends Review: Works great and a lot cheaper than buying it from a professional window cleaning store - These are great to use for helping improve the purity of water. It essentially helps purify the water down to 90 or 95% purity which is fantastic and it lasts you forever. We’ve only bought it this year so we don’t know how long it last but if you take good care of it, it should last a good five maybe seven years. ## 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 | |---------------|-------| | ASIN | B07ZVYQKTQ | | Best Sellers Rank | #50,214 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #363 in Replacement Under-Sink Water Filters | | Brand | Max Water | | Brand Name | Max Water | | Customer Reviews | 4.2 out of 5 stars 44 Reviews | | External Testing Certification | ISO 9001 | | Included Components | commercial Membrane | | Item Dimensions D x W x H | 4"D x 4"W x 40"H | | Item Weight | 8 Pounds | | Manufacturer | Max Water | | Manufacturer Part Number | 104299 | | Material | Polyamide Thin-Film Composite | | Material Type | Polyamide Thin-Film Composite | | Model Number | BW-4040 / TW30-4040 2400 GPD | | Number of Items | 1 | | Product Benefits | Removes impurities, contaminants, and chemicals for cleaner, better-tasting water | | Product Dimensions | 4"D x 4"W x 40"H | | Unit Count | 1.0 Count | ## Product Details - **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 ## Images ![Max Water 4" x 40" BW-4040 / TW30-4040 2400 GPD Brackish Water RO Membrane Perfect for Car Wash, Whole House & Industrial Applications - 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 - Image 2](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 - Image 3](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 - 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 - Image 5](https://m.media-amazon.com/images/I/818RIIzW7pL.jpg) ## Available Options This product comes in different **Style** 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 ### ⭐⭐⭐⭐⭐ Excellent Membrane for brackish water *by F***N on July 8, 2025* This product is excellent i got it on time like they say and in order no damages I'm a happy customer and will purchase again and will recommend this product to family and friends ### ⭐⭐⭐⭐⭐ Works great and a lot cheaper than buying it from a professional window cleaning store *by B***N on December 14, 2023* These are great to use for helping improve the purity of water. It essentially helps purify the water down to 90 or 95% purity which is fantastic and it lasts you forever. We’ve only bought it this year so we don’t know how long it last but if you take good care of it, it should last a good five maybe seven years. ### ⭐⭐⭐⭐⭐ exactly what we needed *by D***N on April 24, 2023* Fast shipment. Just what we needed. ## 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) --- ## 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.hr/products/172846906-max-water-4-x-40-bw-4040-tw30-4040-2400](https://www.desertcart.hr/products/172846906-max-water-4-x-40-bw-4040-tw30-4040-2400) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-05-21*