--- product_id: 94785668 title: "Max Water ULP-4040 Reverse Osmosis 4\" x 40\" RO Membrane, 2600 GPD For Water Purification Desalination Commercial, Industrial, Agricultural" brand: "max water" price: "₱24138" currency: PHP in_stock: true reviews_count: 13 category: "Max Water" url: https://www.desertcart.ph/products/94785668-max-water-ulp-4040-reverse-osmosis-4-x-40-ro store_origin: PH region: Philippines --- # 2600 GPD capacity 600 psi max pressure 99.35% impurity rejection Max Water ULP-4040 Reverse Osmosis 4" x 40" RO Membrane, 2600 GPD For Water Purification Desalination Commercial, Industrial, Agricultural **Brand:** max water **Price:** ₱24138 **Availability:** ✅ In Stock ## Summary > 💧 Elevate your water game—purity and power in one sleek membrane! ## Quick Answers - **What is this?** Max Water ULP-4040 Reverse Osmosis 4" x 40" RO Membrane, 2600 GPD For Water Purification Desalination Commercial, Industrial, Agricultural by max water - **How much does it cost?** ₱24138 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ph](https://www.desertcart.ph/products/94785668-max-water-ulp-4040-reverse-osmosis-4-x-40-ro) ## 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 - • **Eco-Safe & Durable:** BPA-free, dry-shipped membrane built to last 24-36 months, combining safety with sustainability. - • **Unmatched Water Purity:** Experience crystal-clear water with 99.35% impurity rejection for your commercial or agricultural needs. - • **High-Volume Performance:** Pump out up to 2600 gallons per day—perfect for industrial-scale water purification without compromise. - • **Robust Pressure Handling:** Engineered to operate efficiently at pressures up to 600 psi, ensuring consistent filtration under demanding conditions. - • **ISO 9001 Certified Quality:** Manufactured under strict quality standards for reliability and long-lasting performance you can trust. ## Overview The Max Water ULP-4040 is a high-capacity 4" x 40" reverse osmosis membrane designed for commercial, industrial, and agricultural water purification. Delivering up to 2600 gallons per day with a 99.35% impurity rejection rate, it operates efficiently under pressures up to 600 psi. Certified ISO 9001 and constructed with BPA-free materials, this durable membrane ensures safe, long-lasting performance with advanced thin film composite technology. ## Description Buy Max Water ULP-4040 Reverse Osmosis 4" x 40" RO Membrane, 2600 GPD For Water Purification Desalination Commercial, Industrial, Agricultural: Replacement Under-Sink Water Filters - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: Very good quality - I bought these for my reverse osmosis system and it has been working with amazing results. Review: El producto llegó en buen estado y a tiempo, buena calidad ## Features - Optimal Purity & Performance: Achieve exceptional water quality with our ULP-4040 4" x 40" RO Membrane capable of producing UP TO 2600 Gallons Per Day, featuring a 99.35% impurity rejection rate, 600 psi Optimum Pressure: 100 psi (80-150) Salt Removal Rate: 99.20% PH levels and salt concentration < 2000 (pH 3-10) Maximum free chlorine tolerance: <0.1 ppm. - Choosing the Right Membrane: Effectively filter contaminants like heavy metals (fluoride, lead, chromium), organic materials, 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: The ULP-4040 4 x 40 inch RO Membrane is designed for whole-house, agricultural, and industrial applications. This membrane delivers a robust capacity of 2,600 GPD and allows for seamless integration with industry-leading models, including Dow Filmtec AG4040FF, TW30-4040, and GE XLE-4040. - 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 ULP-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. - 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. - Trusted Expertise: With 25+ years of experience, we help you choose the perfect membrane for your water needs. Each membrane has a unique purpose and our expert guidance ensures you make the right choice. If you pick the wrong one, our hassle-free exchange policy will get you the correct membrane quickly. We also offer excellent post-sale support for installation, maintenance & troubleshooting. Let us make the process simpler-contact us today for an absolutely hassle-free, no-loss purchase for both parties. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07GZTZVFR | | Best Sellers Rank | #37,356 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #275 in Replacement Under-Sink Water Filters | | Brand | Max Water | | Customer Reviews | 4.5 4.5 out of 5 stars (216) | | Date First Available | October 16, 2021 | | External Testing Certification | ISO 9001 | | Item Weight | 6.93 pounds | | Item model number | Commercial Membrane | | Manufacturer | Max Water | | Material | Fiberglass | | Number of Items | 1 | | Product Benefits | Removes impurities for improved water quality | | Product Dimensions | 3.94"D x 3.94"W x 39.76"H | | UPC | 680392199928 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** Max Water - **External Testing Certification:** ISO 9001 - **Material:** Fiberglass - **Product Benefits:** Removes impurities for improved water quality - **Product Dimensions:** 3.94"D x 3.94"W x 39.76"H ## Images ![Max Water ULP-4040 Reverse Osmosis 4" x 40" RO Membrane, 2600 GPD For Water Purification Desalination Commercial, Industrial, Agricultural - Image 1](https://m.media-amazon.com/images/I/51+xFoyYEfL.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 ### ⭐⭐⭐⭐⭐ 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. ### ⭐⭐⭐⭐⭐ Review *by Y***. on January 28, 2026* El producto llegó en buen estado y a tiempo, buena calidad ### ⭐⭐⭐⭐⭐ Works very well. *by G***A on October 8, 2025* Works very well. First one lasted almost a year with nasty well water. ## Frequently Bought Together - Max Water ULP-4040 Reverse Osmosis 4" x 40" RO Membrane, 2600 GPD | ULP 4040 For Water Purification Desalination Commercial, Industrial, Agricultural | Compatible with Dow Filmtec AG4040FF, TW30-4040 - 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 - SimPure Whole House Water Filter Housing (DB10P), 10" x 4.5" Sediment Carbon Filter Universal Housing, Pre-Filtration System for Well and City Water, 1" NPT Port, Pressure Release --- ## 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.ph/products/94785668-max-water-ulp-4040-reverse-osmosis-4-x-40-ro](https://www.desertcart.ph/products/94785668-max-water-ulp-4040-reverse-osmosis-4-x-40-ro) --- *Product available on Desertcart Philippines* *Store origin: PH* *Last updated: 2026-04-22*