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Description
4"x21" | 800 GPD | 99.6% Salt Rejection | Watermaker Seawater RO Membrane | Applied MembranesAMI 4x21 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 4x21 Seawater Desalination Reverse Osmosis Membranes
For Watermakers and Land-and-Sea Based Seawater Desalinators
Highest Salt Rejection Seawater RO Watermaker MembranesAMI 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:
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M-S4021A Specifications
Permeate flow and salt rejection based on 32,000 ppm NaCl feed stream, pressure and recovery listed above. Element Permeate flow may vary +/- 20% M-S4021A Operating Limits
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Related Products for use with M-S4021A 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:
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Physical Dimensions of AMI M-S4021A SWRO Marine Element
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Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- 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
4.5 ★★★★★
Based on 2285 reviews
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Product Reviews
★★★★★ 5
Great for aggressive chewers
Color: Grey
Tuff toy, my yorkie has been trying to tare squeaker out for about 3 days, he works on the fur part but so far it stands up to his chewing, I have gone thru 3 other toys this week so glad thi one works! It lasted 8 days. They need to make whole toy out of material and put fur on top of the tuff material. Once he found out wetting the fur softens it he pulled the seam apart.
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Reviewed in the United States on February 5, 2026
★★★★★ 1
Does not stand up to aggressive chewers
Color: Grey
Supposed to be for heavy chewers. My dog destroyed this toy literally in less than 15 minutes. Tore the tail which I sewed back together and then she tore off the nose and pulled out stuffing. Don't know how they tested this. She is only 6 months old and it didn't stand up to her play. Do not recommend if you have an aggressive chewer.
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Reviewed in the United States on May 30, 2026
★★★★★ 5
Won't last a day
Color: Blue, Color: Blue
My 50 lb. Pitt bull destroyed this chew toy in 15 minutes.
One week later.
I'm changing my rating from a one to a five. My girl spent up until now ripping it apart and pulling the stuffing and squeaker out. She had so much fun that I bought her another one. When I took it out of the box for her, she was so happy, she immediately tried to tear it apart.
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Reviewed in the United States on May 30, 2026
★★★★★ 2
Lasted 2 minutes
Color: Grey, Color: Grey
Gave it a 2 star bc it was cute and on time.
I have a GSD- a mildly aggressive chewer. This toy literally lasted 2 minutes and there was stuffing coming out so I had to take it away. Wish I would have read the reviews before I purchased.
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Reviewed in the United States on May 3, 2026
★★★★★ 3
Only Made It Two Weeks
Color: Grey, Color: Grey
This toy easily became my Fig's favorite toy. The squeaker wasn't as annoying as it is in many other dog plushies. However, that's where the positives end.
After the first week, there was a hole in the stitching on its neck. I sewed it up, but it obviously did not last. The squeaker went silent after a few more days. I bought it on March 28th, and it is now April 12th. It's just a rag, now.
RIP little honey badger. You did well in your short life time.
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Reviewed in the United States on April 13, 2026