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PWG RO Membrane 4040


Our PWG 4040 RO Membranes are designed to suit both our Commercial RO Systems and to retrofit 4” x 40” RO Membranes in other systems. The standard 4040 RO Membrane is a low energy membrane that can produce up to 411 litres of RO water per hour with an impressive rejection rate of 99.3%. The 4040 High Flow RO membrane is a higher pressure membrane offering higher permeate production of up to 522 litres per hour at the same 99.3% rejection rate.

Why Choose Our PWG 4040 RO Membranes?

  • Average rejection rate of 99.3%
  • Low energy and high production options
  • Energy efficient without compromising production
  • Suitable retrofit for other 4040 RO membranes

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


PWG 4040 RO Membranes have been developed with energy efficiency in mind whilst maintaining the high rejection rates required for industrial, municipal and waste water recovery processes. The standard ‘4040 RO Membrane’ runs at pressures as low as 6.9 bar and is a suitable alternative to Oltremare LOW1-4040, Hydranautics ESPA1-LD-4040 and Axeon HF1-4040 membranes. The ‘4040 High Flow RO Membrane’ is designed to run at a higher operating pressure of 15.5 bar and produces the highest permeate flow rate of all 4040 membranes on the market. The high flow membrane is a suitable alternative to the Oltramere LOW1-4040-XL.

Key Product Information

  • Permeate flow rates from 410 to 520 litres per hour
  • Designed for use in commercial RO systems
  • Supplied tape wrapped and with brine seal
  • High operating temperatures of up to 45⁰C
  • Suits most 4040 membrane housings

Compatible Products

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



4040: ATD Diameter 100.3mm, Connection Diameter 19.1mm, Core Tube Feed Size 26.7mm, Length 1016mm
4040HF: ATD Diameter 100.3mm, Connection Diameter 19.1mm, Core Tube Feed Size 26.7mm, Length 1016mm



Permeate Flow

4040: 410 litres per hour
4040HF: 520 litres per hour

Average Rejection Rate


Pressure Drop

0.7 Bar

Max Operating Temperature


Max Operating Pressure

20,7 Bar (300 PSI)

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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