SKU: 89540922305

4"x21" | 1,025 GPD | Low Energy | Tape Wrap | FilmTec Membrane

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Description

4"x21" | 1,025 GPD | Low Energy | Tape Wrap | FilmTec MembraneDOW FILMTEC XLE 4021 Low Energy Reverse Osmosis Membrane Element DOW FILMTEC XLE 4021 Elements offer better system performance and economics for small commercial systems by operating at very low applied pressure. DOW FILMTEC XLE 4021 elements are tape wrapped. In addition to high quality water and low energy costs, DOW FILMTEC membranes also deliver savings by providing long lasting and reliable performance. DOW FILMTEC Brackish Water Reverse Osmosis





DOW FILMTEC™ XLE-4021 Low Energy Reverse Osmosis Membrane Element



DOW FILMTEC XLE-4021 Elements offer better system performance and economics for small commercial systems by operating at very low applied pressure. DOW FILMTEC XLE-4021 elements are tape-wrapped. In addition to high quality water and low energy costs, DOW FILMTEC membranes also deliver savings by providing long lasting and reliable performance.



DOW FILMTEC Brackish Water Reverse Osmosis Elements can separate salts from water and are produced with an automated fabrication process for precision, consistency, and reliability. DOW FILMTEC RO membranes build on a tradition of leadership in the thin-film composite membrane industry and meet the challenges of higher rejection in lower-pressure operations.



DOW FILMTEC XLE-4021 is FDA – 21 CFR 177.2550; Food and Drug Administration Compliant.



Specifications for XLE-4021



FilmTec Product:

XLE-4021


FilmTec Part Number:

154540
Size (Approximate): 4" Dia. x 21"L


Flow Rate:

1,025 gpd (3.9 m³/d)


Applied Pressure:

100 psig (6.9 bar)


Stabilized Salt Rejection:

99.0%


Active Surface Area:

36 Sq. Ft.


Single Element Recovery:

8%


Exterior:

Tape-Wrapped


Membrane Type:

Polyamide Thin-Film


Composite

Permeate flow and salt rejection based: 500 ppm NaCl feed stream, 77°F, 8% recovery, 100 psig.



Operating Limits for XLE-4021



Maximum Operating Temperature:

113°F (45°C)


Maximum Operating Pressure:

600 psig (41 bar)


Maximum Pressure Drop:

13 psig (0.9 bar)


Maximum Feed Flow Rate:

14 gpm (3.2m³/h)


pH Range, Continuous Operation*:

2-11


pH Range, Short-Term Cleaning**:

1-13


Maximum Feed Silt Density Index:

SDI 5


Fere Clorine Tolerance***:		 <0.1ppm

*Maximum temperature for continuous operation above pH 10 is 95°F
**Refer to cleaning guidelines.


***Under certain conditions, the presence of free chlorine and other oxidizing agents will cause premature membrane failure. Since oxidation damage is not covered under warranty, Dow recommends removing residual free chlorine by pretreatment prior to membrane exposure.



Related Products for use with XLE-4021

PV4021SSAU-316 Stainless Steel Membrane Housing Pressure Vessel for 4" x 21" Membrane Element
PV4021PWG PVC Membrane Housing Pressure Vessel for 4" x 21" Membrane Element



Benefits of DOW FilmTec Commercial RO Membranes



  • Lower Operating Pressure reduces power consumption, lowering the cost of equipment and operation.


  • Reverse Osmosis water treatment removes up to 99% of total dissolved solids from water.


  • High flux results in high yields


  • High rejection provides good water quality


  • FilmTec performance and quality



Common Applications for FilmTec XLE-4014 Commercial RO Membranes:



  • Commercial Water Treatment Systems


  • Food Service


  • Medical and Research Institutions


  • Hospitality Industry



Physical Dimensions of DOW FilmTec XLE-4014

INCHES (MM)
A

21.0 (533)
B

1.05 (27)
C

0.75 (19)
D

3.9 (99)

XLE-4021 Fits nominal 4x21 size pressure vessels.

For more information, please visit this products webpage.
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Exchange/Return Notes
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SKU: 89540922305

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4.7 ★★★★★
Based on 24 reviews
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Product Reviews
K
Verified Purchase
K Younger
Port Orchard, US
★★★★★ 5
Do it yourself
Size: 38"Height × 14" Wide
I purchased a similar set to custom make a dining room table out of butcher block, and it turned out perfect. So with the left over butcher block I purchased these legs and made the perfect kitchen island to match. It is very sturdy and a great price. Everyone wants to know where I purchased it from. I also put a piece of the butcher block across the lower bars and made a lower shelf. Love love love this.
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Reviewed in the United States on December 2, 2025
T
Verified Purchase
Tani
Louisville, US
★★★★★ 4
Plan your project right & these will look great!
Size: 38"Height × 14" Wide
These are great legs for a table. They are sturdy and go together nicely. The painted finish is well done, meaning it doesn't scratch or peel or come off easily. Also the way things were packaged was considerate of the weight and possibility of damage during shipment. There were even extra attachment screws included which was helpful since I lost one under the dishwasher. When considering what legs to purchase for your particular table, the height, dimensions, and weight of the top all need to be factored in. I used these bar height legs under a very heavy, 7' long X 2' wide top. Common physics dictates that there will be lateral movement between the 2 "H" shaped leg sets. There HAS to be support between the 2 H leg sets to prevent that lateral movement. So these alone will not support a long table very well, because physics. This is not in any way the fault of this product. Be aware that there is more to the stability equation and be prepared to add cross bracing to your project.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 4, 2025
A
Verified Purchase
Amazon Customer
Houston, US
★★★★★ 5
Hold my computer desk top repaired
Size: 38"Height × 14" Wide
Counter height table legs are sturdy and it holds a great amount of weight. I was easy to adjust height for the table we needed to be repaired with legs. It was a great choice in repair of computer desk. I had a desk that tore apart because of the press board siding. Took the top of of siding and repaired with these legs. I am totally satisfied
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Reviewed in the United States on October 25, 2025
J
Verified Purchase
Jacob Lingeman
Los Angeles, US
★★★★★ 2
Wobbly
Size: 38"Height × 14" Wide
Look great but they are not solid. Table is super wobbly
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Reviewed in the United States on August 21, 2025
M
Verified Purchase
MJ
Cuba, US
★★★★★ 5
Modern, Sturdy, and Perfect for Outdoor Projects
Size: 38"Height × 14" Wide
These metal pipes made fantastic table legs for our outdoor wood table. They have a sleek, modern look that feels high-end. We sprayed them with Rust-Oleum for added protection, and they’ve held up great. Solid, stylish, and functional—highly recommend for any DIY furniture project!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 25, 2025

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