SKU: 96583337498

4" x 40" | 2,400 GPD | FRP Wrapped | Commercial Brackish RO Membrane | Applied Membranes

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Description

4" x 40" | 2,400 GPD | FRP Wrapped | Commercial Brackish RO Membrane | Applied Membranes4" x 40" Brackish Water Reverse Osmosis Membrane Fiberglasssed Shell 2,400 GPD BWRO AMI commercial thin film BWRO elements are wrapped in a hard shell of FRP for added strength and to withstand higher pressure drops. AMI commercial brackish water RO membrane elements produce high quality water from tap or brackish water sources in commercial RO systems, and are among the finest in the industry. With hundreds of thousands of membranes in operation in


4" x 40" Brackish Water Reverse Osmosis Membrane | Fiberglasssed Shell | 2,400 GPD BWRO

AMI commercial thin film BWRO elements are wrapped in a hard shell of FRP for added strength and to withstand higher pressure drops. AMI commercial brackish water RO membrane elements produce high quality water from tap or brackish water sources in commercial RO systems, and are among the finest in the industry. With hundreds of thousands of membranes in operation in water filtration systems world-wide, AMI membranes have earned a reputation of delivering consistent, reliable, and long lasting performance, making AMI Membranes the natural choice for use in commercial RO systems. AMI Commercial Brackish Water Reverse Osmosis Membranes are constructed of tap water TFC (thin film composite) membrane material and fit standard PVC and Stainless Steel RO Membrane Housings.

AMI Membranes are 100% Quality and Performance Tested in their ISO 9001:2015 Certified Facilities.

Specifications for M-B4040A

AMI Part Number: M-B4040A
Membrane Size (Nominal): 4 x 40
Membrane Dimensions: 3.9"Dia. x 40"L
Flow Rate: 2,400 GPD (9,084)
Applied Pressure: 225 psi (1.6 MPa)
Stabilized Salt Rejection: 99.5%
Outer Wrap: Fiberglassed Shell
Membrane Type: Tap or Brackish Water
Membrane Sheet: TFC (Thin Film Composite)
Element Type: Spiral Wound
For Housing: Standard 4" x 40"
Feed Water Test Temperature: 77°F (25°C)
Single Element Recovery: 15%
Chlorine Tolerance: 0
Feed water pH Range: 2-11
Manufacturer: Applied Membranes, Inc.
Country of Manufacture: United States (USA)
Can Replace:






 DOW FilmTec BW30-4040
DuPont BW30-4040, 80783
GE Desal AG4040FM, AG-90, 411-HF(PA)
CSM RE4040-BN
Toray TM710
Axeon HR3-4040

Note: Performance specifications based on 2,000 mg/l sodium chloride, 225 psi (1.6 MPa) applied pressure, 77ºF (25ºC) feed water temperature, pH 8 and the recovery listed in the table above. Element permeate flow may vary ± 20%.

Features of AMI Brackish Water RO Membranes

  • High Rejection & Flow Rate
  • Hard fiberglass exterior provides added strength and withstands higher pressure drops than tape-wrapped elements.
  • Manufactured in our ISO 9001:2015 Certified Facilities
  • 100% Performance and Quality Tested
  • Backed by our Experienced Technical Support Staff
  • 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

Applications for AMI Commercial BWRO Membranes

  • Restaurants
  • Aquariums
  • Whole House (Residential)
  • Office
  • Institutions
  • Hotels
  • Hospitals
  • Disaster Relief
  • Spot Free Rinse/Car Wash
  • Labs
  • Pharmaceutical
  • Humidification
  • Misting
  • Manufacturing
  • Rinse Water
  • Bottled Water
  • Water stores
  • Beverage
  • Food Processing
  • Ice Makers
  • Commercial Water Treatment
  • Ice Makers
  • Tap Water
  • Brackish Water
  • Wide Variety of Other Applications

Physical Dimensions of M-B4040A:

Total Length (L):

40 In. (101.6 cm)

Membrane Length (I):

38 In. (96 cm)

Diameter (D):

3.9 In. (9.9 cm)

PWT (P):

0.75 In. (1.9 cm)

Replacement Compatibility for AMI 4 X 40 RO MEMBRANES

Applied Membranes M-B4040A FRP wrapped membrane elements can be used as direct replacement for many industry-standard 4x40 size RO elements with 3/4" male product water tubes ("stinger style") which are rated at 225psi. These include:

  • DuPont DOW FilmTec BW30-4040 (80783)
  • GE Desal AG4040FM (1206761), AG4040FF, AG-90 (3056665), 411-HF(PA) (1153192)
  • CSM RE4040-BN
  • Toray TM710
  • Axeon HR3-4040 (200373).

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: 96583337498

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Diana H
Omaha, US
★★★★★ 5
Perfect for low dose, great price
On my second bottle, great product for the cheap price, lasts almost a year. Hard to find in this low dose. I personally find low dose melatonin to work better than the higher amounts. It’s the sweet spot.
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Reviewed in the United States on October 19, 2025
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Strategos
Charlottesville, US
★★★★★ 5
Knocks me out cold
I wish I could easily find a lower dose, but this works. Take one about 30 mins before I want to sleep and when I fall asleep I don't wake up in the middle of the night. I normally have insomnia but one of these generally gives me 9 hours of sleep. It doesn't ALWAYS work (I have health problems that can keep me awake) but instead of 5-7 hours sleep I am consistently getting around 9. The only problem is I'm groggy in the morning. But I feel a lot less haggard and anxious in the morning now so I think I'll be continuing with this.
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Reviewed in the United States on June 12, 2025
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Verified Purchase
Katiushka
Pawtucket, US
★★★★★ 5
Very good product
These melatonin pills work. I bought them because sometimes I'm so stressed or pressured by everyday life that I find it hard to fall asleep. I don't use them every day, only when I really can't sleep and it's very late. I must say that this pill doesn't knock you out completely. I liked that. You fall asleep slowly, and the next day you don't feel groggy or like you've had too much to drink. It's a great product!
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Reviewed in the United States on September 7, 2025
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Verified Purchase
TryAndShareResults2016
Bozeman, US
★★★★★ 4
A Game-Changer for Sleep Disorders - Genuine Experience
I wanted to share my personal journey with Melatonin and how it has significantly improved my struggle with sleep disorders, specifically delayed sleep phase. Please note that this review is completely unbiased and I have received no compensation or free products for writing this. Living with delayed sleep phase has been incredibly challenging. I've tried various methods to reset my sleep schedule, but none seemed to offer a lasting solution. That's when I decided to give Melatonin a shot after hearing positive feedback from others. From the very first night, I noticed a difference. Taking Melatonin about 30 minutes before my desired bedtime helped me feel drowsy and ready for sleep. It wasn't a magic solution, and it took some time to fully adjust my sleep pattern, but Melatonin was a crucial aid in that process. What I appreciate about Melatonin is that it felt natural and non-intrusive. It didn't knock me out; rather, it gently guided my body into a state of relaxation conducive to sleep. Over a few weeks of consistent use, I noticed that I was falling asleep earlier and waking up feeling more refreshed. I want to stress that I purchased Melatonin on my own accord, and I'm sharing this review solely based on my experience. This isn't a paid review, and I didn't receive any free samples. My improvement in sleep quality is a testament to the product's effectiveness. If you're struggling with sleep disorders like delayed sleep phase, I encourage you to explore Melatonin as an option. Of course, it's always wise to consult with a healthcare professional before introducing any new supplement into your routine. In my case, Melatonin has been a game-changer, and I'm grateful to have found a solution that aligns with my goal of achieving a healthier sleep schedule. In conclusion, Melatonin has played a significant role in helping me manage my sleep disorder. It's not a one-size-fits-all solution, but it's certainly worth considering if you're seeking a natural way to regulate your sleep patterns. My experience is genuine, and I hope others find the relief they're seeking through Melatonin as well.
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Reviewed in the United States on August 18, 2023
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Verified Purchase
nader makarious
Dallas, US
★★★★★ 5
great quality
Very nice product. It helped me to sleep
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Reviewed in the United States on April 27, 2026

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