4 inch RO Membranes

4 inch reverse osmosis membranes are designed for commercial and light industrial applications, offering high efficiency and excellent salt rejection. Available in 4" x 21" and 4" x 40" sizes, and in different types to suit all applications, including brackish water, seawater, and low-pressure systems.

4040 Brackish Water RO Membranes

  • Brackish Water RO membrane delivers high permeate flows and salt rejection at high salinity inlet water (up to 8000 ppm NaCl Salinity). High Rejection BWRO membranes offer a combination of high rejection, reliability, and durability.
  • 4 Inch BW Reverse Osmosis Membranes operates at (from 12 to 17bar / 175 to 250 PSI) inlet feed water pressure.
LG RO Membrane - BW 4040 R High Salt Rejection
-13%

LG RO Membrane - BW 4040 R High Salt Rejection

Regular price $419.00
Sale price $419.00 Regular price $485.00
Unit price
LG BW 4040 R Membrane, High Salt Rejection Reverse Osmosis Membrane    Permeate Flow GPD...
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Trilite BWHR-4040 RO Membrane
-18%

Trilite BWHR-4040 RO Membrane

Regular price $325.00
Sale price $325.00 Regular price $400.00
Unit price
Commercial 4040 High Salt Rejection Reverse Osmosis Membrane    Permeate Flow GPD (m3/d) Stable Rejection...
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Revese Osmosis Membrane Vontron LP21-4040
-8%

Revese Osmosis Membrane Vontron LP21-4040

Regular price $365.00
Sale price $365.00 Regular price $400.00
Unit price
Brackish Water Reverse Osmosis Membrane - Vontron LP21-4040, 4 inch x 40 inch     Permeate...
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Hydranautics CPA5-LD-4040 Reverse Osmosis Membrane
-13%

Hydranautics CPA5-LD-4040 Reverse Osmosis Membrane

Regular price $518.00
Sale price $518.00 Regular price $600.00
Unit price
Hydranautics CPA5-LD-4040, 4 inch x 40 inch Brackish Water RO Membrane 4”x40” Hi Rejection Brackish...
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FilmTec BW30 PRO-4040 - 4" x 40" Brackish Water Membrane
-10%

FilmTec BW30 PRO-4040 - 4" x 40" Brackish Water Membrane

Regular price $520.00
Sale price $520.00 Regular price $580.00
Unit price
FilmTec BW30 PRO 4040 Membrane, 4 inch x 40 inch Reverse Osmosis Membrane Fouling resistant...
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4 Inch Low Pressure Reverse Osmosis Membranes

  • 4″ Low Energy, Energy Saving (ES), and Ultra Low Pressure (ULP) membrane elements are designed for low to moderate salinity feed water applications (with inlet TDS up to 2,000 ppm NaCl).
  • Low-pressure membrane elements are rated for a test working pressure of 150 PSI (10.3 bar).
  • Available Sizes: 4″ x 40″ and 4″ x 21″

 

Low Pressure LG RO Membrane BW 4040 ES
-13%

Low Pressure LG RO Membrane BW 4040 ES

Regular price $419.00
Sale price $419.00 Regular price $485.00
Unit price
LG BW 4040 ES, Low Pressure Reverse Osmosis Membrane     Permeate Flow GPD (m3/d) Stable...
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Trilite BWLE-4040 Low Pressure RO Membrane
-18%

Trilite BWLE-4040 Low Pressure RO Membrane

Regular price $325.00
Sale price $325.00 Regular price $400.00
Unit price
Commercial 4 inch x 40 inch Low Pressure Reverse Osmosis Membrane    Permeate Flow GPD...
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Vontron ULP21-4040 RO Membrane
-8%

Vontron ULP21-4040 RO Membrane

Regular price $365.00
Sale price $365.00 Regular price $400.00
Unit price
Commercial 4 inch x 40 inch Low Pressure Reverse Osmosis Membrane    Permeate Flow GPD...
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Vontron ULP11-4040 Hi Flow
-8%

Vontron ULP11-4040 Hi Flow

Regular price $365.00
Sale price $365.00 Regular price $400.00
Unit price
Vontron ULP11-4040, 4 inch x 40 inch High Flow & Low Pressure Reverse Osmosis Membrane    Permeate Flow...
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Vontron ULP21-4021 Reverse Osmosis Membrane
-23%

Vontron ULP21-4021 Reverse Osmosis Membrane

Regular price $269.00
Sale price $269.00 Regular price $350.00
Unit price
Vontron ULP21-4021, 4 inch x 21 inch Low Pressure Reverse Osmosis Membrane 4”x21” Low Energy...
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4 Inch Ultra Low Pressure RO Membranes (Ultra Low Energy)

  • They are designed for low salinity water to operate at ultra low pressure (ULP). with inlet TDS up to 1000 ppm NaCl.
  • These membrane elements are based around 100 PSI (around 7 bar) test working pressure, please check each membrane details below
Vontron XLP11-4040
-8%

Vontron XLP11-4040

Regular price $365.00
Sale price $365.00 Regular price $400.00
Unit price
Vontron XLP11-4040, 4 inch x 40 inch Extremely Low Pressure Reverse Osmosis Membrane 4”x40” Extremely Low Pressure...
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TRILITE BWULE-4040
-18%

TRILITE BWULE-4040

Regular price $325.00
Sale price $325.00 Regular price $400.00
Unit price
TRILITE BWULE-4040, Ultr Low Pressure Reverse Osmosis Membrane   Low operating pressure (approximately half of standard...
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FilmTec XLE PRO-4040 - 4" x 40" Low Pressure Membrane
-12%

FilmTec XLE PRO-4040 - 4" x 40" Low Pressure Membrane

Regular price $595.00
Sale price $595.00 Regular price $680.00
Unit price
FilmTec XLE PRO 4040 Membrane, 4 inch x 40 inch Reverse Osmosis Membrane Extra Low...
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Seawater Desalination 4 Inch RO Membranes

  • Used for Seawater desalination systems.
  • Marine and Maritime watermakers.
  • Yacht and boat desalination units.
-16%

Vontron SW4040LE Seawater RO Membrane

Regular price $570.00
Sale price $570.00 Regular price $680.00
Unit price
Hi Flow 4040 Seawater RO Membrane, Vontron SW4040LE 4”x40” Sea Water Membrane 1,900 gpd /...
Hydranautics SWC5-LD-4040
-7%

Hydranautics SWC5-LD-4040

Regular price $665.00
Sale price $665.00 Regular price $720.00
Unit price
4040 Seawater Membrane, Hydranautics SWC5-LD-4040 4”x40” Sea Water RO Membrane 1,750 gpd / 99.7% / 800...

4″ RO Membrane Housings


4"x40" Stainless Steel RO Membrane Housing
-26%

4"x40" Stainless Steel RO Membrane Housing

Regular price $235.00
Sale price $235.00 Regular price $320.00
Unit price
4040 Stainless Steel Reverse Osmosis Membrane Pressure Vessel. 300 PSI End Clamp Membrane Pressure Vessel...
4"x21" Stainless Steel RO Membrane Housing
-29%

4"x21" Stainless Steel RO Membrane Housing

Regular price $190.00
Sale price $190.00 Regular price $270.00
Unit price
4" x 21" Stainless Steel Reverse Osmosis Membrane Pressure Vessel 300 PSI End Clamp Membrane...
4"x40" 4040 Membrane Pressure Vessel
-15%

4"x40" 4040 Membrane Pressure Vessel

Regular price $339.00
Sale price $339.00 Regular price $400.00
Unit price
4 Inch Reverse Osmosis Membrane Housing 300 PSI RO Membrane Housing For 4″x40″ 4040 Membranes...
4"x21" 4021 FRP Membrane Pressure Vessel
-15%

4"x21" 4021 FRP Membrane Pressure Vessel

Regular price $295.00
Sale price $295.00 Regular price $350.00
Unit price
4021 Reverse Osmosis Membrane Housing 300 PSI Fiberglass Membrane Housing For 4″x21″ 4021 Membranes 4...
4040 Seawater Membrane Housing 4"x40"
-9%

4040 Seawater Membrane Housing 4"x40"

Regular price $790.00
Sale price $790.00 Regular price $875.00
Unit price
4040 Seawater Membrane Pressure Vessel 1000 PSI 4 inch RO Membrane Housing For Watermakers &...