SKU: 69581433787

4" x 21" | 900 GPD Commercial Reverse Osmosis RO Membrane | Applied Membranes

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Description

4" x 21" | 900 GPD Commercial Reverse Osmosis RO Membrane | Applied Membranes4" x 21" Reverse Osmosis Membrane Tap or Brackish Water 900 GPD RO Membrane AMI commercial RO membrane elements produce high quality water from tap or brackish water in small 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


4" x 21" Reverse Osmosis Membrane | Tap or Brackish Water | 900 GPD RO Membrane

AMI commercial RO membrane elements produce high quality water from tap or brackish water in small 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 small commercial RO systems. AMI Small Commercial RO 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-T4021A

AMI Part Number: M-T4021A
Membrane Size (Nominal): 4 x 21
Membrane Dimensions: 3.9"Dia. x 21"L
Flow Rate: 900 GPD (3,407 LPD)
Applied Pressure: 225 psi (1.6 MPa)
Stabilized Salt Rejection: 99.5%
For Housing: Standard 4" x 21"
Outer Wrap: Tape Wrapped
Membrane Type: Tap or Brackish Water
Membrane Sheet: TFC (Thin Film Composite)
Element Type: Spiral Wound
Feed Water Test Temperature: 77°F (25°C)
Single Element Recovery: 8%
Chlorine Tolerance: 0
Feed water pH Range: 2-11
Can Replace:




 DOW FilmTec TW30-4021
DuPont TW30-4021 80608
GE Desal AG4021TM
GE Desal AG4021TF
Axeon HR3-4021
Manufacturer: Applied Membranes, Inc.
Country of Manufacture: United States (USA)

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 Tap Water / Brackish Water RO Membranes

  • High Rejection & Flow Rate
  • 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 RO 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-T4021A:

Total Length (L):

21 In. (53.3 cm)

Membrane Length (I):

19 In. (48 cm)

Diameter (D):

3.9 In. (9.9 cm)

PWT (P):

0.75 In. (1.9 cm)

Replacement Compatibility for AMI 4 X 21 RO MEMBRANES

Applied Membranes M-T4021A membrane elements can be used as direct replacement for many industry-standard 4x21 size RO elements with 3/4" male product water tubes ("stinger style") which are rated at 225psi. These include DuPont DOW FilmTec TW30-4021 (80608), GE Desal AG4021TM (1206750, AG4021TF), and Axeon HR3-4021.

If you do not see your membrane 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: 69581433787

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4.6 ★★★★★
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J
Verified Purchase
Jfaith
Boise, US
★★★★★ 5
Stays put and dissolves slowly. Orange flavor is nice.
If you have to use something overnight for dry mouth definitely get these. I use one nightly with my mouth guard. The orange flavor is very nice and it dissolves slowly overnight. It's small enough to do the trick, but not be overpowering. It stays put. And it works. Definitely notice the improvement inside my mouth.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 13, 2025
I
Verified Purchase
Irina Wen
Waukegan, US
★★★★★ 5
This is a seminal book on psychotherapy. A must have!
Format: Hardcover
In the age of virtual (dis)connection, concerning high rates of depression and anxiety, and the importance of self-reliance and individualism, this book comes as a lighthouse of hope and direction. Attachment Theory in Practice is a must-have for any therapist who is looking to deepen their work and bring desired transformation and change to their clients’ lives. The book provides a beautiful overview of the current state of the mental health field and the need for focusing on emotion, attachment and connection in psychotherapy. Dr. Johnson reminds us that “in order to shape optimal regulation that allows clients to harness their emotions for growth and aliveness, therapists have to ensure that clients are actively engaged with an emotional reality.” She echoes the findings from research on emotion regulation and suggests that “coregulation, rather than solo self-regulation, is the baseline, normal, and most-efficient strategy for us as social animals.” Dr. Jonson clearly posits that change is an emotional and an interpersonal phenomenon. The book also outlines very practical guidance to working with couples, individuals, and families using the the attachment framework and EFT. As a therapist who is interested in science and empiricism, I am delighted to see the tremendous amount of research support EFT for couples has received over the past decade and I look forward to learning more about the findings in the areas of EFIT and EFFT.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 1, 2019
C
Verified Purchase
CC Tsai
Lowell, US
★★★★★ 5
A Foundational Book in EFT
Format: Hardcover
In a field of books about EFT, Sue Johnson’s new book provides an up-to-date summary of the latest developments in the EFT method, including applications for individual, couple and family therapy. Having been a student of EFT for 12 years or more, this book was more than a repetition of the fundamentals of the method, its stages and steps, which appear in her earlier books and have been elaborated by other authors. Here, I found her efforts to situate EFT conceptually in the field of psychotherapy, not only its attitude toward defining health and distress, but the underlying principles for its attitude toward how change occurs and its unique principles for how therapists help clients (individual, couple or family) foster change in themselves and their lives. She explains and illustrates the use of the EFT Tango moves, which implement the EFT method within the clinical dialogue and actualize the change process. No doubt, this book will become a primary source for future EFT training and is worth both reading and mastering cover-to-cover.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 21, 2019
T
Verified Purchase
Tracy Lewis
Draper, US
★★★★★ 5
Broadens EFT Couple frame to individual and family work
Format: Hardcover, Format: Hardcover
I am really digging in to this. Even though it is an academic book, I find it highly readable and pragmatic. I am chewing slowly on pieces and am using my attachment TANGO (read the book) with my individual clients to great effect. Previously I would use an attachment frame but it wasn’t as focused and organized. Really an orienting perspective. Of course I am also integrating this precisely written guide with my couples, as I am an EFT couple therapist. And for classroom teaching the first few chapters alone highlight—and back up with research the reliability of attachment as a unifying frame. I call it my “map for human” and it Really is. Thank you Sur for putting all that research in one place.
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Reviewed in the United States on February 15, 2019
A
Verified Purchase
Angie Juniper
Boise, US
★★★★★ 5
Love this book!!
Format: Hardcover
Sue Johnson has done it again! She is on the cutting edge of Attachment Science and is leading the way in helping us humans join other humans on our journey of healing! As a therapist, she has impacted how I work and practice the art of connecting. Thanks Sue!! Great job! This book has expanded Emotionally Focused Therapy so that no one is missing out.... individuals, couples, and families can all be impacted by the process of emotional resonance, regulation and revision. Thank you!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 21, 2019

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