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LG RO Membrane 4040


Our range of LG RO Membranes are designed to suit standard 4040 RO membrane housings. Incorporating LG’s innovative Thin Film Nanocomposite (TFN) technology our range of brackish water RO membranes offer superior performance with intrinsic anti-fouling properties. They are suitable for applications that require consistent and reliable membrane performance. The ES (energy saving) version is designed to run at an operating pressure of 10 bar and the UES (ultra-low energy) version operates at pressures as low as 6.9 bar.

Why Choose Our LG RO Membrane 4040?

  • Suitable for all standard 4” x 40” membrane housings
  • High nominal rejection rates of up to 99.5%
  • TFN technology with anti-fouling properties
  • Energy saving low pressure membranes

Need Help With Our LG RO Membrane 4040? Give us a call on 01622 933 853


LG’s range of technologically advanced membranes offer high permeability at low operating pressures. The ultra-low pressure UES version is suitable for low salinity brackish water applications and the slightly higher pressure ES is suitable for low to medium salinity brackish feed water.

The LG UES membrane offers an average rejection rate of 99% at pressures as low as 6.9 bar. It is an extra low energy membrane and is a suitable alternative to Oltremare LOW4-4040, Axeon HF4-4040, Hydranautics ESPA4-4040 and Dow/Filmtec XLE-4040.

The LG ES membrane offers an average rejection rate of 99.5% at an operating pressure of 10 bar. It is a low energy membrane and is a suitable alternative to Oltremare LOW2-4040, Axeon HF1-4040 and Dow/Filmtec LE-4040.

Key Product Information

  • High permeate flow rates of up to 10,200 Litres per day
  • Suitable alternatives to other 4040 RO membranes
  • Popular for commercial and industrial applications
  • High operating temperatures of up to 45⁰C
  • Genuine LG RO membranes

Compatible Products

Need help with our LG RO Membranes 4040? Give us a call on 01622 933 853



ATD Diameter 100mm, Connection Diameter 19mm, Length 1016mm



Permeate Flow

LG RO Membrane 4040 UES: 10.2m³/day
LG RO Membrane 4040 ES: 9.5m³/day

Average Rejection Rate

LG RO Membrane 4040 UES: 99%
LG RO Membrane 4040 ES: 99.5%

Pressure Drop

15 PSI Per Element

Max Operating Temperature


Max Operating Pressure

600 PSI

Membrane Active Area


pH Range



Resources Available For This Product:

Salt delivery , great price & good communication regarding delivery time.
Leslie Braunton
Leslie Braunton
Excelkent service and quick delivery
Paulie L.
Paulie L.
Excellent product and a wonderful customer service
Reece Baker
Reece Baker
Great Company, website is easy to use and delivery arrived on time. I would recommend.
Karl P
Karl P
Presales support using chat was excellent. The product was reasonably priced, arrived quickly and worked well. Will definitely use them again. Highly recommended...
Jacksandmatt Rooke
Jacksandmatt Rooke
Great website, very easy to use. Ordered 4 wound sediment filters for our rainwater harvesting tank. Made in the UK and a great value price. Delivered promptly and followed up with a call to make sure all was good. Would definitely recommend.
Simon Hallworth
Simon Hallworth
Prompt delivery and well priced water filters
Iain Allison
Iain Allison
Fantastic company to deal with super easy website and very fast delivery.
Roddy Watt
Roddy Watt
Very good and quick service even up in the far north of Scotland where we very often do not get delivered to or have to pay extra for no extra cost
Narinder Rayit
Narinder Rayit
Sarah at Ultra Soft Water Softeners helped to identify a suitable JG replacement connector for tri-flow water filter system. She went extra mile to make sure it was the right one. Really pleased with the service. Even called me to ensure the item was delivered and worked which it did. Thank you & well done.

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