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Note 11th October 2025: We are paused dispatching new orders. We will resume dispatching on the 20th of October 2025. For urgent orders please contact us. Our technical support is still available as usual. Well Water Systems and routine commercial orders still dispatch without interruption.

4040 Window Washing RO Membrane

 

It's difficult to beat this membrane for window washing applications. This Ultra Low Pressure (ULP) membrane fits in standard 4040 housings.

 

Specification:

  • 425 Litres per hour / 2,700 GPD / 10.2m3/d rated
  • 99.4% NaCl rejection in test conditions.
  • 9.3m2 Effective Area
  • NSF-61

 

Our customers have been getting as low as 4ppm TDS output from this membrane. 4ppm TDS was achieved on a new membrane using 3-Stage prefiltration of 5um, GAC & 1um off standard municipal water in Tipperary, Ireland.

 

We have a range of other membranes should you require something different.

 

4040 Window Washing Membrane

SKU: ULP4040
€215.00Price
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