Skip links

Ozmosis Reverse Osmosis Membrane SW-4021 Desalination 4″ x 21″

CALL 239-398-0967 TO PURCHASE


Ozmosis Brand 4″ x 21″ Seawater Desalination Water Membrane
Optimal Pressure 800 PSI (800-1,000 PSI)
Its Average GPD 800
Salt Rejection Rate is 99.5%
Made of the highest quality materials including Toray Brand Sheets

This 4″ x 21″ Seawater Desalination Membrane packs impressive power, delivering 800 gallons per day (GPD) of purified water. With an outstanding 99.5% salt rejection rate, it ensures a continuous supply of high-quality fresh water. Crafted for durability in challenging marine conditions, installation is a breeze.

Versatile Application Range: Suitable for a wide range of applications, including marine use, desalination systems, car washes, irrigation, the food industry, whole house reverse osmosis, commercial reverse osmosis, agricultural, and industrial purposes.

Universal Compatibility: Designed to fit all standard 4″ x 21″ membrane housings made of  fiberglass, ensuring easy installation in a variety of systems.

High-Quality Materials: Crafted from top-tier materials, with Toray brand sheets and Dow brand glue, guaranteeing durability and efficiency in water purification processes.

Superior Fiberglass Wound Housing: Utilizes fiberglass wound housing, which is known for its superior performance and durability compared to plastic housings, ensuring long-lasting use.

Impressive Performance Specifications: Offers high-performance specifications, including an average production rate of 800 gallons per day (GPD), a maximum pressure rating of 1000 psi, exceptional salt rejection of 99.5%, and effective boron removal rate of 93%. Additionally, it boasts a 4% recovery rate and is designed to operate optimally in high total dissolved solids (TDS) water conditions.

This reverse osmosis membrane is specifically tailored for seawater applications and is not intended for use in brackish water conditions, making it ideal for locations with high TDS in their water sources.

Additional information



Average Production

800 GPD

Max Pressure

1000 psi

Salt Rejection


Boron Removal Rate



There are no reviews yet.

Be the first to review “Ozmosis Reverse Osmosis Membrane SW-4021 Desalination 4″ x 21″”

Your email address will not be published. Required fields are marked *

This website uses cookies to improve your web experience.