CSM RE4021-BLN 1050 GPD Brackish Water Membrane 4 x 21


SKU: RE4021-BLN Category:


The CSM RE4021-BLN brackish water membrane is high productivity RO membrane element with extended area for brackish water.  They can be used in multiple membrane systems to process or treat, municipal, industrial, or commercial water.   CSM brackish water high rejection membrane elements are most widely used because of their ability to sustain excellent performance.   CSM membrane elements have a high chemical durability which prevents declining of their performance after CIP.


  • Permeate Flow Rate: 1050 gallons per day
  • Membrane Type: Thin-film Polyamide Composite
  • Applied Pressure: 150 psi
  • Dimensions: 4″ x 21″
  • Chlorine Tolerance: 0 ppm
  • Maximum Operating Temperature: 113° F
  • Applications: Tap Water, Brackish Water, Well Water, Surface Water

CSM RE4021-BLN Technical Information

CSM RE4021-BLN GPD Brackish Water Membrane Specifications

Good Replacement For:

Manufacturer Model
Dow Filmtec LE-4021
Hydranautics ESPA2-LD-4021
Hydranautics ESPA1-4021
Axeon HF1-4021

* Replacement models are assumed to be equivalent if nominal flow is within 15% and rejection is within 0.2% for same test conditions

Additional information

Weight 8 lbs
Dimensions 24 × 4 × 4 in