XE1-2521 RO Membrane NSF-Certified Extremely Low Pressure Compatible Element by SpiroPure

Name: XE1-2521 RO Membrane NSF-Certified Extremely Low Pressure Compatible Element by SpiroPure
Brand: SpiroPure
SKU: 943046149
Price: 69.10 USD
Availability: InStock
Rating: 5.0 (1 reviews)

SP-XL2521
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Product Overview
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The SpiroPure SP-XL2521 Extremely Low-Pressure Commercial Reverse Osmosis Membrane Replacement 2.5 x 21 is a high quality extra-low energy replacement membrane filter cartridge. The SP-XL2521 Low Pressure RO membrane provides optimal RO filtration performance at very low feed pressures for low energy consumption and extra savings on operating costs. Choose SpiroPure’s Extreme Low Pressure RO Membrane 2521 as a compatible replacement for the model numbers included below.

Extremely Low-Pressure XLP (ELP) 2521 RO Membrane Specifications:

Nominal Size: 2.5" x 21"
Certification: NSF 61 certified
Salt Rejection Rate: 98.5%
Average Permeate ±15%: 300 GPD @ 100 PSI
Feedwater NaCl: 500 ppm
Fresh Water Recovery Rate: 8%
Feed Spacer: 28 mm
Maximum Recommended NaCl: <2,000 ppm
Maximum Operating Pressure 600 PSI

XLP-2521 Extreme Low Energy Membrane common applications:

Commercial water treatment systems
Low salinity brackish water
Smaller water treatment systems
Whole house RO systems
Food service
Medical and research institutions
Hospitality industry
Drinking water
Wastewater reuse
Car washes
Agricultural
Irrigation

XLE-2521 Extreme Low Pressure Element compatible model numbers:

XE1-2521
Dupont Filmtec XLE-2521
LG Chem LG BW 2521 UES

FAQs on 2521 Commercial RO Membrane

What is a 2521 low pressure RO membrane?

A 2521 low pressure RO membrane is a 2.5" x 21" reverse osmosis element built to filter effectively at reduced feed pressures. The SpiroPure SP-XL2521 is an Extremely Low-Pressure membrane, delivering reliable performance for smaller commercial systems while using less energy than standard-pressure membranes.

What is the flow rate of the SpiroPure SP-XL2521 membrane?

The SpiroPure SP-XL2521 produces an average permeate output of 300 GPD (±15%) at 100 PSI, tested against 500 ppm feedwater NaCl. Actual output can vary depending on your system's real feed water quality, temperature, and operating pressure.

What is the salt rejection rate of the SP-XL2521 RO membrane?

The XL2521 (ELP 2521 membrane) has a salt rejection rate of 98.5% under standard lab test conditions. It's rated for feedwater up to 2,000 ppm NaCl maximum, making it well suited for low-salinity water sources rather than brackish or seawater applications.

Is the SP-XL2521 suitable for commercial RO systems?

Yes. The SP-XL2521 is designed for commercial water treatment systems, including food service, hospitality, and medical or research applications. Its extremely low operating pressure requirement also makes it a good fit for smaller commercial systems with limited pump capacity.

Which membrane models can SP-XL2521 replace?

The SpiroPure SP-XL2521 is manufactured as a compatible replacement for the Dupont Filmtec XLE-2521 and LG Chen LG BW 2521 UES, matching their 2.5" x 21" size and extremely low-pressure performance specifications. Confirm your housing dimensions before ordering.

How much does the SpiroPure SP-XL2521 cost?

The SpiroPure SP-XL2521 RO membrane price is well below comparable OEM extremely low-pressure elements, without a performance tradeoff. Check the current price directly on this page, since compatible replacement pricing typically runs a fraction of brand-name equivalents.

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0 out of 0 people found this review helpful.

Great customer service

By Anonymous on 6/10/2026 4:00:14PM

My organization had some unique requirements for purchasing and the sales team was proactive in helping. Product arrived on time as advertised.

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