$390.00
See if it's really the one
Search with this product to compare it, find similar styles, or turn up something better before deciding.
SW30 4021 – 4" DuPont FilmTec Seawater Reverse Osmosis Replacement Membrane The SW30 4021 is a high-performance 4" DuPont FilmTec replacement membrane, engineered for seawater reverse osmosis (SWRO) applications. Built to withstand high TDS (Total Dissolved Solids) levels, this thin-film composite membrane sustains the higher pressures required for marine and industrial water treatment while maintaining an impressive 99.4% stabilized salt rejection. Key Features: ✔️ 4" Diameter – Standard size for seamless system compatibility ✔️DuPont FilmTec Technology – ✔️ High TDS & Pressure Tolerance – Designed for seawater and high-salinity applications ✔99.4% Salt Rejection – Removes dissolved salts for high-purity water ✔️ **Thin-Film Composite (TFC) Design– Enha ✔Industrial & Marine Applications – Ideal for seawater desalination and commercial filtration systems ✔Easy Replacement – Perfect for seawater desalination plants, marine industries, and high-salinity environments, the SW30 4021 4" replacement membrane delivers exceptional performance and durability.
Have a question about this?
We currently ship within the US, with more countries coming soon.
Final cost and dates are confirmed at checkout.
🇺🇸 Ship from USA · On Agora since 2026
$390.00