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Home > Membranes & Housings > Dow Filmtec Commercial RO Membranes

Filmtec (XLE-4021) Low Energy Membrane 1025 GPD 4" X 21"

Filmtec (XLE-4021) Low Energy Membrane 1025 GPD 4" X 21"


Retail Price:: $617.28

Your Savings:: $238.28

Your Price: $379.00


Availability: Ships within 24-72 hours

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6+ $367.86


FILMTEC reverse osmosis (RO) elements offer the highest quality water for small commercial systems purifying less than one gallon per minute (0.2 m3/d) of RO water.

  • FILMTEC membranes are available in a variety of sizes to meet a wide range of space requirements.
  • FILMTEC XLE extra low energy elements operate at the lowest pressure in the industry, resulting in lower energy costs and enabling system builders to use lower cost components.
  • In addition to the highest quality water and the lowest energy costs, FILMTEC membranes also deliver savings by providing the industry's longest lasting and most reliable performance.
Product Name Nominal Active Surface Area
ft2 (m2)
Permeate Flow Rate
gpd (m3/d)
Stabilized Salt Rejection
FILMTEC XLE-4021 36 (3.3) 1025 (3.9) 99.0
  • Permeate flow rate and salt rejection based on the following test conditions: 500 ppm NaCl, 100 psig (6.9 bar), 77°F (25°C), and 8% recovery.
  • Permeate flow rates for individual elements may vary +/-20%.
  • For the purpose of improvement, specifications may be updated periodically.
  • Related Info


    Cost Effective Product
    I am using this product in my office. This product is cost effective and very good in performance.
    Reviewed by: Pol Mady from Dallas, Texas. on 4/9/2012
    Providing High Quality Water
    I am using this membranes in my home.It is perfect in its performance. It is providing high quality water.
    Reviewed by: Lil Pege from Anchorage, Alaska. on 4/5/2012
    Cost Savings Product
    I bought this product mainly for its high performance in low pressure requirements. It works well. I'll have to test it on lower pressure of 60 psi when I get a chance but it does what it is suppose to.
    Reviewed by: Ken Viki from Kansas, Ohio. on 3/30/2012