2.5” x 21” / 2521 Commercial RO Membrane Replacement
SpiroPure membranes are an excellent choice for smaller commercial reverse osmosis (RO) systems and other related needs. Options include the brackish water SP-BW2521 RO membrane and the SP-XL2521 extremely low pressure membrane (XLE-2521 / XLP-2521), both designed to deliver high-performance treatment of total dissolved solids (TDS). When you need low-pressure, energy-efficient membranes with high RO performance, the brackish water and extremely low-pressure elements offer two reliable options for reducing operating pressure and energy consumption.
Membrane Type |
Model |
Rejection Rate |
Average Permeate ±15% |
Feedwater NaCl |
Fresh Water Recovery Rate |
Concentration of Salt Solution (Feedwater NaCl) |
Feed Spacer |
Maximum Recommended NaCl |
Maximum Operating Pressure |
|
|---|---|---|---|---|---|---|---|---|---|---|
2521 RO Membranes |
Extremely Low Pressure |
98.5% |
|
500 ppm |
8% |
500 ppm |
28 mm |
< 2,000 ppm |
600 psi |
|
Brackish Water |
99.5% |
|
2,000 ppm |
8% |
2,000 ppm |
28 mm |
< 10,000 ppm |
600 psi |
||
Seawater Desalination |
99.5% |
|
32,000 ppm |
4% |
32,000 ppm |
28 mm |
< 40,000 ppm |
1,200 psi |
Membrane Type |
SpiroPure |
Dupont / Filmtec |
GE / SUEZ |
Axeon |
LG Chen |
|---|---|---|---|---|---|
Extremely Low Pressure |
SP-XL2521 |
XLE-2521 |
XE1-2521 |
LG BW 2521 UES |
|
Brackish Water |
SP-BW2521 |
TW30-2521 |
LG BW 2521 R |
||
Seawater Desalination |
SP-SW2521 |
SW30-2521 |
SE1-2521 |
Find the Right Membrane Replacement
All Filters offers three membrane types that are designed to handle different water sources and system requirements. These include the following:
Extremely Low-Pressure Membrane
Designed for systems that operate with a very low pressure, the SpiroPure SP-XL2521 is a 2.5” x 21” RO extremely low-pressure membrane. It is ideal for energy-efficient applications and water with low concentrations of TDS.
This membrane works well with small commercial systems like those found in restaurants, laboratories, and office buildings, where minimizing energy consumption is a priority.
Brackish Water Membrane
The SpiroPure SP-BW2521 is a brackish water membrane that is designed for small RO systems that process moderately salty water. Brackish water has more salinity than freshwater but not as much as seawater. This 2521 membrane is often used in small commercial applications like restaurants, car washes, and aquariums.
Seawater Desalination Membrane
The SpiroPure SP-SW2521 seawater desalination membrane is designed for high-salinity uses, like treating seawater or extremely brackish water. This 2.5” x 21” RO membrane has a maximum operating pressure of 1,200 psi.
It’s ideal for uses like small desalination projects, aquaculture setups, Watermaker and other marine applications, or any system that needs to reliably handle high-TDS feedwater.
Specifications and Cross-Reference Chart
At All Filters, our specifications and cross-reference charts make it easy to find a compatible filter for your system. You can use the specifications chart to find the right membrane by matching product information like your system’s feedwater salinity, rejection rate, and maximum operating pressure.
You can also use the cross-reference chart to find the right 2.5” x 21” RO membrane. Simply identify the brand and model of your current membrane, then check across the chart to find the corresponding SpiroPure membrane. For help finding filters compatible with your system, our friendly support team is available seven days a week.
Order 2521 Membranes Online
Upgrade your RO system with high-quality membranes from All Filters. Our charts and specifications make it easy to find the right replacement membrane, whether it’s for low-pressure, brackish, or seawater desalination.
Plus, enjoy free shipping on orders over $99 and special shipping deals on many items including Super Value packs. Order 2.5” x 21” RO membranes online and save with All Filters.
