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LG RO Membrane 4021


Our LG RO Membranes are suitable for all standard 4021 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 which require a consistent and reliable membrane performance. These energy saving membranes offer high rejection rates of 99.5% at operating pressures of 10.3 bar.

Why Choose Our LG RO Membrane 4021?

  • Suitable for all standard 4” x 21” membrane housings
  • High nominal rejection rate of up to 99.5%
  • TFN technology with anti-fouling properties
  • Energy saving low pressure membranes

Need help with our LG RO Membrane 4021? Give us a call on 01622 933 853


LG’s range of technologically advanced membranes offer high permeability at low operating pressures. These energy saving membranes are suitable for low to medium salinity brackish feed water. They are suitable for commercial and industrial applications and although LG are ‘the new kid on the block’ when it comes to RO membranes, they already operate in major utilities all over the world.

This LG ES (energy saving) membrane offers an average rejection rate of 99.5% at an operating pressure of 10.3 bar. It is a low energy membrane and is a suitable alternative to Oltremare LOW2-4021, Axeon HF1-4021 and Dow/Filmtec LE-4021

Key Product Information

  • High permeate flow rates of up to 3,800 litres per day
  • Suitable alternatives to other 4021 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 4021? Give us a call on 01622 933 853



ATD Diameter 100mm, Connection Diameter 19mm, Length 533mm



Permeate Flow


Average Rejection Rate


Pressure Drop

15 PSI Per Element

Max Operating Temperature


Max Operating Pressure

600 PSI

Membrane Active Area


pH Range



Resources Available For This Product:

Excellent service highly recommend will use again
David Keys
David Keys
Prompt delivery and a great product
Brian O'Neill
Brian O'Neill
Great service. It’s was delivered very quickly! Highly recommend!
Lovely company to deal with and prompt delivery. I'm in the scottish highlands and they recognised that post is better than courier for rural deliveries.
A wide range of filters ( and UV bulbs) available. Extremely prompt delivery at a very competitive price. Great follow up customer care too.
George Santis
George Santis
Ordered two wound sediment filters which I found to be a very good quality products and very fast delivery. Extremly friendly customer service. I recomend to anyone.
Alistair MacLean
Alistair MacLean
I bought the wound sediment filters. I found the filters arrived very quickly. It was later followed by a courtesy call to make sure the product was received and correct. Just fitted the filter and it is working very well. Very friendly customer service, would not hesitate to reorder from them in the future.
Joe Bloggs
Joe Bloggs
NOT JUST excellent, but also highly technically competent, customer service, all served up with courtesy and good humour. To be recommended without fear or favour. I'm hooked as their customer, where replacement cartridges are need.
Ivo Hesmondhalgh
Ivo Hesmondhalgh
Speedy delivery, very helpful staff. I needed to return the attachment devices and they were very helpful and refunded me within days
scott cornwell
scott cornwell
Placed my order online but they still rang me to make sure I had ordered the correct items and to make sure I hadn't made a mistake when ordering. Fantastic service highly recommended. Thanks

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