--- product_id: 54539935 title: "ULP21 4040 Commercial 2400gpd Reverse Osmosis RO Membrane Low Pressure" brand: "vontron" price: "R12450" currency: ZAR in_stock: true category: "Vontron" url: https://www.desertcart.co.za/products/54539935-ulp21-4040-commercial-2400gpd-reverse-osmosis-ro-membrane-low-pressure store_origin: ZA region: South Africa --- # Ultra low operating pressure (2/3 standard) 2400 GPD ultra-pure output 98%+ rejection rate for contaminants ULP21 4040 Commercial 2400gpd Reverse Osmosis RO Membrane Low Pressure **Brand:** vontron **Price:** R12450 **Availability:** βœ… In Stock ## Summary > πŸ’§ Elevate your water game with ultra-efficient purity and power! ## Quick Answers - **What is this?** ULP21 4040 Commercial 2400gpd Reverse Osmosis RO Membrane Low Pressure by vontron - **How much does it cost?** R12450 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/54539935-ulp21-4040-commercial-2400gpd-reverse-osmosis-ro-membrane-low-pressure) ## Best For - vontron enthusiasts ## Why This Product - Trusted vontron brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Massive 2400 GPD Capacity:** Delivers a staggering 2400 gallons of pristine water dailyβ€”perfect for commercial scale needs. - β€’ **Versatile Application Ready:** Ideal for window cleaning, aquatics, and any professional requiring ultra-pure water. - β€’ **Pure Performance, Less Pressure:** Runs at just two-thirds the pressure of typical membranes, saving energy without sacrificing output. - β€’ **Elite 98%+ Contaminant Rejection:** Ensures near-total removal of impurities for crystal-clear, safe water. - β€’ **Durable Thin Film Composite Build:** Engineered with premium TFC material for longevity and consistent performance under tough conditions. ## Overview The Vontron ULP21-4040 is a commercial-grade 40-inch reverse osmosis membrane designed for ultra-low pressure operation, producing up to 2400 gallons of purified water daily with a rejection rate exceeding 98%. Engineered with thin film composite technology, it offers energy-efficient performance and durability, making it ideal for demanding applications like window cleaning and aquatics. ## Description The Vontron ULP21-4040 40inch Commercial Reverse Osmosis RO Membrane is ideal for production of pure water for many applications. Working under the conditions of ultra low operating pressure, ULP membrane series can achieve as high permeated flow and rejection rate as regular low-pressure membranes can, it rus under approximately two thirds pressure of that regular low pressure compound membranes, and can achieve a rejection rate of as high as 98%. This membrane is capable of producing 2400 gallons of product water per day, and is ideal for Window Cleaning applications, along with Aquatics. Please see detailed manufacturers specification below: Technical parameter for Vontron 4040 RO membrane ULP21-4040 Performance Stable property desalinization rate % 99 Lowest desalinization rate % 98.5 Volume GPD (m--3/d) 2400(9.1) Effective membrane area ft2(m2) 85(7.9) Test condition Test pressure 150pai(1.03Mpa) Test fluid temperature 25Β°C Test fluid density (NaCl) 1500ppm Test fluid pH 7.5 Single RO membrane element recovery rate 15% Extreme operating conditions The maximum operating pressure 600psi(2.07Mpa) The maximum water supply temperature 45Β°C The maximum water supply SDI 5 free chlorine concentration in water supply 0.1ppm Water supply pH scope when continuous running 3~10 Water supply pH scope when chemical cleaning 2~12 The maximum pressure drop of single RO membrane element 15psi(0.1Mpa) ## Features - The Vontron ULP21-4040 40inch Commercial Reverse Osmosis RO Membrane is ideal for production of pure water for many applications. - Working under the conditions of ultra low operating pressure, ULP membrane series can achieve as high permeated flow and rejection rate as regular low-pressure membranes can, it rus under approximately two thirds pressure of that regular low pressure compound membranes, and can achieve a rejection rate of as high as 98%. - This membrane is capable of producing 2400 gallons of product water per day, and is ideal for Window Cleaning applications, along with Aquatics. - Please see detailed manufacturers specification below ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00I1GCX1O | | Benefits | Effectively filters and purifies water | | Best Sellers Rank | 669,225 in DIY & Tools ( See Top 100 in DIY & Tools ) 560 in Replacement Under-Sink Water Filters | | Brand Name | Vontron | | External Testing Certification | NSF | | Manufacturer | Vontron | | Manufacturer Part Number | ULP21-4040 | | Material Type | Thin Film Composite (TFC) | | Model Number | ULP21-4040 | | Number of Items | 1 | | Unit Count | 1.0 count | ## Product Details - **Brand:** Vontron - **External testing certification:** NSF - **Material:** Thin Film Composite (TFC) - **Product benefits:** Effectively filters and purifies water - **Unit count:** 1.0 count ## Images ![ULP21 4040 Commercial 2400gpd Reverse Osmosis RO Membrane Low Pressure - Image 1](https://m.media-amazon.com/images/I/217oRLvaOKL.jpg) ## Frequently Bought Together - Vontron ULP21 4040 Commercial 2400gpd Reverse Osmosis RO Membrane Low Pressure - HM Digital DM-1 in-Line Dual TDS Monitor, 0-9990 ppm Range, +/- 2% Readout Accuracy --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.za/products/54539935-ulp21-4040-commercial-2400gpd-reverse-osmosis-ro-membrane-low-pressure](https://www.desertcart.co.za/products/54539935-ulp21-4040-commercial-2400gpd-reverse-osmosis-ro-membrane-low-pressure) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-09-07*