3"x31" | 700 gpd | Seawater RO Membrane for Sea Recovery Watermaker | Replaces 2724011333 & 33-3004

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AMI RO Membranes Made in USA

AMI SWRO Seawater Reverse Osmosis Membrane Elements for Watermakers
AMI 3x31 Seawater Desalination Reverse Osmosis Membrane
For Replacement in Sea Recovery Watermaker Systems

Add AMI Membrane Quality to your Existing Seawater Desalination Equipment

AMI Seawater RO Membranes can be used as replacement in Sea Recovery and Blue Water Desalination Watermakers, with exceptional value and performance benefits.  AMI 3x31 elements  replace Sea Recovery 2724011333 or Parker AquaPro 33-3004 membranes, and will fit Sea Recovery Aquamatic and Aqua Whisper Desalination Systems.  AMI SWRO membranes offer the high rejection and high productivity that is ideal for seawater desalination in shipboard applications, watermakers, land-based desalinators and sea-based desalinators, and are among the finest in the industry. For the past 30 years AMI Membrane elements have earned the reputation of consistent quality. AMI Membranes are Made in the USA in their ISO 9001:2015 Certified Facility and are 100% Quality and Performance Tested.

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

Specifications for SWRO Membranes for Watermakers

Benefits of AMI Seawater Membranes for Sea Recovery Watermakers:

  • Add AMI Membrane Quality and Value to your Existing Seawater Desalination Equipment
  • Convert seawater into drinking water on yachts, boats, cruise ships, off- shore platforms, and resorts
  • High Rejection & Flow Rate 
  • Made in the USA 
  • 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
Genuine AMI Membranes ISO USA Quality

Specifications for M-S3031A

AMI Model Number M-S3031A
For use in Systems:

Aqua Whisper Mini 350
Aqua Whisper Mini 550
Aqua Matic 700-1
Aqua Matic 1400-2
Aqua Whisper DX 700-1
Aqua Whisper DX 1400-2
Aqua Whisper PRO 700-1
Aqua Whisper PRO 1400-2
Can Replace Models:

Sea Recovery 2724011333
Parker Racor 33-3004
AquaPro 33-3004
Size (Approximate): 3" Dia. x 31"L
Flow Rate: 700 gpd (2.6 m³/d)
Applied Pressure: 800 psig (55 bar)
Stabilized Salt Rejection: 99.6%
Minimize Salt Rejection: 99.4%
Exterior: Hard Shell Fiberglass
Membrane Type:
Polyamide Thin-Film

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-S3031A

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-S3031A Seawater Elements

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 M-S3031A Sea Recovery Replacement Element

Seawater Reverse Osmosis Membrane for Sea Recovery Systems  
L 31 (787)
I 29 (737)
D 3 (76)
P 0.75 (19)



AMI 3031 membrane elements are intended to be used as direct replacements for Sea Recovery 2724011333 Seawater Membrane and Parker Racor  33-3004 Seawater Membrane - for use in any system using these membrane elements.  Some common systems using these elements are Sea Recovery Aquamatic 7001 & 1400-2, Aqua Whisper DX 700-1 & DX 1400-2, Aqua Whisper Pro 700-1 & Pro 1400-2, and Aqua Whisper Mini AM 350 & AM 550.  AMI 3-Inch membrane elements may also be used in most Blue Water Desalination Water Maker Systems.

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.