SKU: 25216553284

2.5"x40" | 700 GPD | 99.6% Salt Rejection | Watermaker Seawater RO Membrane | Applied Membranes

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Description

2.5"x40" | 700 GPD | 99.6% Salt Rejection | Watermaker Seawater RO Membrane | Applied MembranesAMI 2. 5x40 Seawater Desalination Reverse Osmosis Membranes For Watermakers and Land and Sea Based Seawater Desalinators Highest Salt Rejection Seawater RO Watermaker Membranes AMI high rejection and high productivity seawater reverse osmosis membranes are specially designed for marine applications. AMI SWRO membranes are ideal for seawater desalination in shipboard applications, watermakers, land based desalinators and sea based desalinators. AMI


AMI 2.5x40 Seawater Desalination Reverse Osmosis Membranes
For Watermakers and Land-and-Sea Based Seawater Desalinators

Highest Salt Rejection Seawater RO Watermaker Membranes

AMI high rejection and high productivity seawater reverse osmosis membranes are specially designed for marine applications. AMI SWRO membranes are ideal for seawater desalination in shipboard applications, watermakers, land-based desalinators and sea-based desalinators. AMI Membranes are 100% Quality and Performance Tested in their ISO 9001:2015 Certified Facilities.

Looking for a replacement seawater desalination membrane element for your watermaker filter system? View our Watermaker Replacement Membrane Chart.

Benefits of AMI Seawater Desalination RO Membranes:

  • Convert seawater into drinking water on yachts, boats, cruise ships, off-shore platforms, and resorts
  • Highest Rejection & High Flow Rate
  • Manufactured in ISO 9001:2015 Certified Facilities
  • 100% Performance and Quality Tested
  • High Quality for Consistent and Reliable Performance
  • Uses the most advanced membrane film technology and manufacturing processes
  • Standard dimensions to fit in commonly available housings

Specifications for M-S2540A

AMI Model Number M-S2540A
Can Replace Models:





 DOW SW30-2540
DuPont SW30-2540
FilmTec SW30-2540
Spectra FT-MB-40,
Katadyn FT-MB-40,
Most industry-Standard 2.5x40 Seawater RO Elements
Size (Approximate): 2.5" Dia. x 40"L
Flow Rate: 700 gpd (2.65 m³/d)
Applied Pressure: 800 psig (55 bar)
Stabilized Salt Rejection: 99.6%
Minimize Salt Rejection: 99.4%
Single Element Recovery: 8%
Exterior: Hard Shell Fiberglass
Membrane Type:
 Polyamide Thin-Film
Composite
For Use in Systems:









 Watermakers or marine systems using 2.5x40 SWRO Membranes

Katadyn Spectra Systems:
Catalina 340c
Bimini 300c
Cape Horn Extreme 330
Newport 400c
Newport 700c
Newport 1000c
Monterey 1000

Permeate flow and salt rejection based on 32,000 ppm NaCl feed stream, pressure and recovery listed above. Element Permeate flow may vary +/- 20%

Operating Limits for M-S2540A

Maximum Operating Temperature: 113°F (45°C)
Maximum Operating Pressure: 1,000 psig (69 bar)
Maximum Pressure Drop: 15 psig (1 bar)
Maximum Feed Flow Rate: 6 gpm (1.4m³/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

Related Products for use with M-S2540A Seawater Elements

PRO-2.5-1200-EP-1 2.5x40 Fiberglass Membrane Housing for Seawater RO Membranes (Water Maker Pressure Vessel)
C-C2510-A11 Membrane Cleaning Cartridge with Acid Cleaner to Remove Scale Buildup and Prolong Membrane Life
C-C2510-A22 Membrane Cleaning Cartridge with Alkaline Cleaner to Remove Organics and Prolong Membrane Life
C-C2510-A88 Membrane Preservative Cartridge for Preserving the System and Membrane During Extended Periods of Non-Operation.
655139-03 Oil Absorbing Filter Cartridge - Oil-Water Separator Replacement Cartridge, 20" Big Blue Pentair Pentek Filter
H-F10100CF Plankton Filter - 10" Standard 100 Micron Spun Polypropylene Replacement Filter Cartridge

Common Applications for AMI Seawater Watermaker Elements:

  • Seawater Desalination
  • Marine Applications
  • Watermaker RO Systems
  • Yachts

Physical Dimensions of AMI M-S2540A SWRO Marine Element

INCHES (MM)
L 40.0 (1016)
I 38.0 (960)
D 2.4 (61)
P 0.75 (19)

Replacement Compatibility for AMI 2.5 x 40 SWRO Membranes

AMI 2540 membrane elements are may be used as direct replacements for most industry-standard 2.5" x 40" seawater Membrane elements, including: DOW FilmTec SW30-2540, Katadyn Spectra FT-MB-40, and most other Industry-Standard 2.5x40 Size Seawater RO Elements - for use in any system using these membrane elements. Some common systems using these elements are:

  • Spectra Catalina 340c
  • Spectra Bimini 300c
  • Spectra Cape Horn Extreme 330
  • Spectra Newport 400c
  • Spectra Newport 700c
  • Spectra Newport 1000c
  • Spectra Monterey 1000 (Spectra Watermakers Monterey - 1000)
  • Katadyn Catalina 340c
  • Katadyn Bimini 300c
  • Katadyn Cape Horn Extreme 330
  • Katadyn Newport 400c
  • Katadyn Newport 700c
  • Katadyn Newport 1000c
  • CT-340c-12, CT-340c-24
  • CH-330, CH-330-24
  • NP-400c-12, NP-400c-24
  • NP-700c24, NP-700c-110/12, NP700c-110/24, NP-700c-220/12, NP700c-220/24
  • NP-1000c24, NP-1000c-110/12, NP1000c-110/24, NP-1000c-220/12, NP1000c-220/24

If you do not see your system listed or wish to learn more about compatibility, please contact us. Our certified water treatment experts will be happy to discuss your application. To ensure prompt and accurate information, please include as much information about your system as possible, such as: model, manufacturer, model of membranes being replaced, any available. product manuals or literature associated with your system, and photographs of your system or membranes.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 25216553284

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4.2 ★★★★★
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J
Grantham, US
★★★★★ 5
These Bamboo Pillowcases Made Me Realize I Sleep Hot
Color: 07 - Cream, Size: Queen (20" X 30"), Color: 07 - Cream, Size: Queen (20" X 30")
I bought these mostly because I kept hearing people talk about bamboo pillowcases and honestly thought it sounded a little overhyped, but I totally get it now. The first thing I noticed was how cool they felt compared to regular cotton. I tend to get warm when I sleep and flip my pillow a million times during the night looking for the cold side, and these actually stay noticeably cooler longer. They also feel really soft without having that weird slippery texture some silky pillowcases have. My skin has been less irritated lately and my hair definitely looks less frizzy in the mornings. I have thick hair that tangles easily overnight, and these have helped more than I expected. Another thing I appreciate is that they’ve washed well so far. I was worried they’d pill or lose softness after a wash cycle, but they still feel smooth and nice. They also just make the bed feel cleaner and more comfortable overall. One of those small upgrades that ends up making a bigger difference than you’d think.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 2, 2026
A
Verified Purchase
Aquamac
West Palm Beach, US
★★★★★ 5
Soft and cooling
Color: 08 - Sage Green, Size: Queen (20" X 30")
These are great pillowcases. Very soft, comfortable, and they stay cool throughout the night. They fit perfectly and feel really nice against your skin.
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Reviewed in the United States on May 21, 2026
A
Verified Purchase
Ashley Hile
Boise, US
★★★★★ 4
Sheets are good. Greens don't match
Color: 08 - Sage Green, Size: King (20" X 36"), Color: 08 - Sage Green, Size: King (20" X 36")
I purchased the sage green sheets to go along with another Bedsure comforter, then purchased 2 more pillow cases (because i I like a lot of pillows) and the greens don't exactly match. This doesn't REALLY bother me as I feel like its fine with a little "texture." Sheets feel nice and light and I love the look of it in my room.
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Reviewed in the United States on March 3, 2026
A
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Apple
Lexington, US
★★★★★ 5
Good buy Pillowcases
Color: 08 - Sage Green, Size: King (20" X 36")
I bought these Bedsure king-size pillowcases from Amazon and overall I’m very happy with them. The first thing I noticed was how incredibly soft and smooth the fabric feels. They almost feel silky, which makes them very comfortable to sleep on. When you lay your head down, the material feels cool and gentle on the skin, which I really like. I also appreciate the zipper closure. It keeps the pillow securely inside the case and makes everything look neat and tidy on the bed. The zipper is hidden well and doesn’t feel bulky or uncomfortable. The only small downside is that the pillowcases are so smooth that the pillows can sometimes slide around or even slip off the bed a little. However, that’s really just because the material is so silky. Overall, I would still recommend these pillowcases. They are soft, comfortable, and feel like a nice upgrade compared to regular pillowcases.
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Reviewed in the United States on March 8, 2026
A
Verified Purchase
Amazon Customer
Bozeman, US
★★★★★ 5
Very nice pillowcases
Color: 06 - Beige, Size: Standard (20" X 26")
These pillowcases are really nice. They're soft and wash well. I really like the pocket on the end. It makes your pillows look nice and neat. The price is good too.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 31, 2026

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