SpiroPure SP-SW2521 NSF-Certified 2.5x21 Commercial RO Membrane Seawater Desalination

  • SP-SW2521

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The SpiroPure SP-SW2521 Seawater Desalination Commercial Reverse Osmosis Membrane Replacement 2.5 x 21 is a high quality, high salt rejection replacement membrane filter cartridge. SP-SW2521 offers an extremely high salt rejection rate, making it the perfect choice for treating sea water and other high sodium applications.

Sea Water Desalination RO Membrane Specifications:
  • Nominal Size: 2.5" x 21"
  • Certification: NSF 61 certified
  • Salt Rejection Rate: 99.5%
  • Average Permeate ±15%: 270 GPD @ 800 PSI
  • Feedwater NaCl: 32,000 ppm
  • Fresh Water Recovery Rate: 4%
  • Feed Spacer: 28 mm
  • Maximum Recommended NaCl: <40,000 ppm
  • Maximum Operating Pressure 1,000 PSI
SP-SW2521 High Rejection Membrane common applications:
  • Seawater desalination
  • Marine applications
  • On-board watermakers for drinking water from seawater
  • Watermaker RO Systems
  • Yachts, boats, cruise ships, off-shore platforms, resorts
SW salt water membrane compatible model numbers:
  • SE1-2521
  • Dupont Filmtec SW30-2521

Additional Information

Seawater Membranes Are Shipped Wet

An important industry practice for seawater desalination RO membranes is to have them "shipped wet." After being tested to industry standards, our membranes are preserved for protection during shipping and for future use. The preservative is food-grade, and is found within the membrane itself and not in the air-tight packaging. The preservative creates a moist environment for the filter media, allowing the permeability and performance to be maintained by preventing biological growth during storage as well as providing a longer shelf-life of one-year from the manufacturing date printed on the package.


0 out of 0 people found this review helpful.
5.0 Stars

Fast shipping / Good Price

By Male in 60s and over on 6/30/2025 8:57:50AM

Name Brand filter, have not yet installed for desl but appreas great. Thanks

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