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Filmtec Residential Membrane 1.8"x12" 50 GPD

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Filmtec Residential Membrane Elements 1.8"x12" 50 GPD Part TW30-1812-50D

    ✔️ FILMTEC™ reverse osmosis membrane elements for home drinking water are the industry's most reliable.
    ✔️ Advanced membrane technology and automated fabrication allow these elements to deliver consistent performance that equipment suppliers, water treatment dealers, and residential customers can rely on.
    ✔️ FILMTEC elements are shipped dry for convenient handling and long shelf-life.
    ✔️ These elements are NSF/ANSI Standard 58 listed.
    ✔️ Equipment suppliers can take advantage of FilmTec's Standard 58 listing and participation in the NSF Data Transfer Protocol to reduce costs for reduction claims for their systems.
    ✔️ FILMTEC home drinking water elements are rated at 50 psi and will purify about 20% more water than competitive elements rated at 60 psi (please see the manual for more information). 
    ✔️ If you are not sure if it is time to replace your RO membrane we suggest you test the water's TDSwith this test meter.  
    ✔️ Typically RO membranes last from 3-7 years. 

    Model Number: TW30-1812-50
    Size: 1.8 x 12"
    Nominal Cap
    GPD: 50
    Weight: .5 lbs

      Previously part number ROSTW181250.
      Product Number R/O TW30-1812-50D


      Download manual here

      Customer Reviews

      Based on 6 reviews
      Jamie G. (Coldwater, CA)

      Easy re and re, good video to give clarity

      Thank you for your review! We're glad to hear that the reinstallation process was easy for you and that our instructional video was helpful.
      We strive to provide clear and concise information for our customers. Thank you for choosing us and our Filmtec Residential Membrane.

      Jamie Y. (Campbellford, CA)
      RO filter membrane

      Seems to work well.
      Was very well packaged and arrived promptly

      Hi Jamie,Thank you for your business and your feedback!
      We look forward to helping you again soon.
      Take care and stay safe.

      Dwain A.
      Happy Customer

      Good product. Perfect replacement.

      Thank you again Dwain for your business, your kind words, and taking the time to write this review also.
      We look forward to helping you again soon!

      Dwain A. (Lake Country, CA)
      Happy Customer

      Good product. Perfect replacement.

      Gyle K.
      Filmtec residential membrane

      This was the part we’ve been looking for. Other vendors tried to sell me a “good enough” item and it wasn’t good enough. I’m glad I found you guys!

      Thanks Gyle for your business, and for taking the time to write this review! We look forward to helping you again soon!

      About Filmtec

      FilmTec reverse osmosis (RO) membranes are used for a variety of industrial, municipal, commercial, and residential RO systems. They offer superior quality and performance to separate contaminants in concentrated water, a process which results in purified drinking water.  This brand is now owned by DuPont and was formerly owned by DOW.  According to the DuPont Water Solutions website, FilmTec has been leading the water filtration membrane development for over 70 years (since 1952).   They blend global scale in development with experience in local watersheds and industries to provide optimal solutions everywhere.

      One of the key benefits of using Filmtec RO membrane elements is their high efficiency in removing impurities from water. They can achieve salt rejection rates of up to 99.5%, making them ideal for use in desalination and other water purification applications. Additionally, they are able to remove a wide range of dissolved solids and organic compounds, making them suitable for use in a variety of industrial and commercial applications.

      Another benefit of Filmtec RO membrane elements is their long lifespan. They are designed to have a long service life, typically ranging from 2 to 5 years, depending on the specific model and application. This helps to minimize maintenance costs and downtime associated with replacing or servicing the elements.

      Water eStore carries FilmTec products for various applications.  We vet our suppliers and personally test all FilmTec products, installing them in our homes (where applicable) and monitoring their performance daily. They have earned their reputation as innovative products with top notch customer service.  

      FilmTec products are easy to install and service. We offer YouTube videos that support FilmTec products explaining how they work, how to install and service. We also offer a 100% money back guarantee if you’re not satisfied with your investment in FilmTec products for your family.

      See all from Filmtec

      Shipping Policy

      We offer FREE Shipping to all contiguous states in the United States. If you would like to order products for shipment to other areas please email us with your shipping address and what you would like to order and we'll email you a draft order which will include any extra shipping costs. Once your order is placed, we process it the next business day and ship via ground transportation. In very remote locations, whenever the shipping costs become prohibitive we reserve the right to either cancel the order or ask that you contribute to the shipping costs, it's up to you. Your items may take anywhere from a few days up to a few weeks to arrive. If you have any special shipping requirements, like requiring a signature at time of delivery, please leave a message in the "Special instructions for seller" section while checking out. If you order multiple products they may not all arrive at the same time as we ship from multiple warehouses and each item will be shipped directly to you. If no one is home when your order is delivered it will be left for you but we cannot assume responsibility for your order once it has been dropped off. If you have any questions please contact us at

      Thank you for your order, we appreciate your business!



      Our policy lasts 30 days. If 30 days have gone by since your purchase, unfortunately we can’t offer you a refund or exchange.

      To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.

      To complete your return, we require a receipt or proof of purchase.

      Please do not send your purchase back to the manufacturer.


      Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.

      If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within a certain amount of days.

      Late or missing refunds

      • If you haven’t received a refund yet, first check your bank account again.
      • Then contact your credit card company, it may take some time before your refund is officially posted.
      • Next contact your bank. There is often some processing time before a refund is posted.
      • If you’ve done all of this and you still have not received your refund yet, please contact us at

      Sale items

      Only regular priced items may be refunded, unfortunately sale items cannot be refunded.


      We only replace items if they are defective or damaged. If you need to exchange it for the same item, send us an email at and send your item to: The Water Store 1004 King Street Midland Ontario CA L4R0B8.


      To return your product, you should mail your product to:

      The Water Store
      1004 King Street
      Midland Ontario CA L4R0B8

      You will be responsible for paying for your own shipping, customs and borkerage fees, if applicable, for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of return shipping will be deducted from your refund.

      Depending on where you live, the time it may take for your exchanged product to reach you, may vary.

      If you are shipping an item over $75, you should consider using a trackable shipping service or purchasing shipping insurance. We don’t guarantee that we will receive your returned item.

      Still Got Questions?

      Not to worry, we're here to help. Let us know what questions you have about Filmtec Residential Membrane 1.8"x12" 50 GPD and one of our experts will get back to you shortly.