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Filmtec Dow Commercial Reverse Osmosis Membranes ®

Filmtec Dow Commercial Reverse Osmosis Membranes ®

Dow Filmtec ® commercial & industrial reverse osmosis membranes

See Residential Dow Filmtec reversers osmosis membranes

  1. Regular Price: $259.99

    Special Price $179.95

    Dow Filmtec ® TFC RO reverse osmosis membrane. Extra fast recovery and high production flow rate. Learn More
  2. Regular Price: $299.99

    Special Price $287.00

    As low as: $243.00
    FILMTEC TW30-4040 is the industry standard for reliable operation and production of the highest quality water. Filmtec TW30- 4040 by Dow is 4" Dia x 40" Length with a flow rate of 2400 Gal/Day. It has a flow rate pressure of 225 PSI and a Stabilized Salt rejection 99.5%. Learn More
  3. $179.95
    FILMTEC™ XLE-2521 Elements offer better system performance and economics for small commercial systems by operating at very low applied pressure. FILMTEC XLE-2521 elements are tape-wrapped. In addition to high quality water and low energy costs, FILMTEC membranes also deliver savings by providing long lasting and reliable performance. Learn More
  4. Regular Price: $482.50

    Special Price $473.00

    As low as: $429.00
    FILMTEC DOW SW30-4040 membrane elements have the highest flow rates available to meet the water demands of both sea-based and land-based . FILMTEC SW30-4040 elements may also be operated at lower pressure to reduce pump size, cost and operating expenses. SW30-4040 by Dow is a 4"-40" Length with a flow rate of 1,950 Gal/Day with a pressure of 800 PSI and Stabilized Salt Rejection rate of 99.4%. Filmtec TW30-4040 is the industry standard for reliable operation and production of the highest quality water. Learn More
  5. Regular Price: $329.00

    Special Price $300.00

    As low as: $256.00
    4"x40" Filmtec Dow Lowest Pressure XLE Membrane. It has extra low energy with a flow rate of 2,600 Gal/Day. It's size is 4" Dia. x 40" Length with a Test Pressure of 100 PSI and a Stabilized Salt Rejection rate at 99% Learn More
  6. Regular Price: $899.99

    Special Price $675.00

    As low as: $649.99
    Dow Filmtec ® BW-30-400 commercial reverse osmosis membrane - 8" D X 40" L - up to 10,500 GPD flow rate. Learn More
  7. Regular Price: $7.99

    Special Price $4.99

    As low as: $2.49
    Pro Products Sani System Sanitizer. 0.25 or 0.5 fl. oz. concentrate. Sani-System ® Pro Products is proud to introduce Sani-System, the first and only EPA product approved for sanitizing water softeners, RO units and Water Coolers. Sani System is proven to kill 99.9% of E. coli, E. coli O157:H7, Staphylococcus aureus, Listeria monocytogenes and other harmful bacteria. It does not use chlorine, other oxidizers or acids that can harm water softener equipment parts. Use is simple; each dose comes in a pre-measured pouch. Just cut, pour and regenerate softener. No measuring, No mess! Sanitizing Equipment! Applications Interior Surfaces of Water Softeners, Reverse Osmosis (RO) Units, Ice Machines, Water Coolers, Water Holding Tanks and Pressure Tanks. Sani-System is now NSF certified! This is the best sanitizing solution available anywhere! Stock up and save. Learn More
  8. Regular Price: $49.99

    Special Price $37.99

    As low as: $17.99
    TDS Meter - Tester. The Only Way To Know If Your Reverse Osmosis RO Membrane Is Performing Correctly - Tests for TDS - Total Dissolved Solids. A Must For All RO System Owners. Compare Incoming Feed Water To Treated Water - Replace Membrane If Less Than 80% of TDS Is Being Removed - The lower the TDS level in the water, the more efficiently your body's cells actually get hydrated by the water that you drink. The higher the TDS levels in the water, the greater the probability of harmful contaminants that can pose health risks or hinder the absorption of water molecules on the cellular level. Simple to use for Reverse Osmosis membrane monitoring. We really like this tester and think that anyone who wants to know about the quality of their water should have one of these TDS Meter Testers to monitor their RO membrane. Learn More
  9. Regular Price: $49.99

    Special Price $39.99

    As low as: $19.99
    TDS Meter - Dual Mode - Installs Inline - Check the TDS level with the push of a button. Now you can easily check to make sure the water from your reverse osmosis system is top quality. Measure the tap water coming in vs. the purified water going out of your system at any time. Very easy installation. FEATURES Displays TDS levels of the feed water and product water with in & out electrode probes. Highly efficient and accurate due to its advanced microprocessor technology. Auto-Off function conserves battery power. The unit shuts off automatically after 10 minutes of non-use. Comes equipped with John Guest Quick-Connect T-fittings as shown. Installs quickly and easily. SPECIFICATIONS Range: 0-9990 ppm Accuracy: ±2% Always know if your RO membrane is performing correctly! Learn More
  10. Regular Price: $5.99

    Special Price $3.99

    As low as: $1.79
    Dow Corning/Molykote ® 111 6 gram O-ring Silicone Lubricant and Sealant - 6 gram pillow pack. (like a ketchup packet) Great O-ring sealant and lubricant. FDA and NSF approved. (Do Not Use Petroleum Jelly As It May Break Down O-rings Or Housings) This is the same premium grade silicone sealant and lubricant used in underwater photography cameras, scuba gear and other underwater applications that simply can't afford leaks. Why not use the best for your reverse osmosis or drinking water filtration system?

    Dow 111 Silicone MSDS Safety Sheet

    Learn More

Easy TDS Membrane Performence Calculator
See If It is Time To Replace Your Membrane

Simply enter your Feed Water TDS and RO Water TDS into the boxes above and click "Submit". The percentage of TDS (total disolved solids) rejection will be displayed. We normally recommend membrane replacement once you drop below 75%. This may vary in areas with high TDS in the feed water.   Let the tap water and reverse osmosis water run for a few seconds before drawing your sample.

See our selection of TDS meters under Water Tests.  Knowing the rejection rate is the only wat to know if it is time to replace your reverse osmosis membrane.


Be sure to check our Parts Department for important parts such as TDS Testers For Reverse Osmosis Membranes, Replacement Tanks, O-rings , Filter Housing Wrenches, Faucets, Pumps, Fittings, UV Systems and more parts for your reverse osmosis pure water filtration system.   View maintenance and servicing tips online at our Installation & Trouble shooting Guide.


* Dow Filmtec ® is the registered trademark of Dow Filmtec, the manufacturer of Dow Filmtec ® brand water treatment equipment.  The replacement filters and membranes listed above are not manufactured or endorsed by Dow Filmtec.  Rather, these filters and membranes are manufactured by other companies.  While these filters and membranes are compatible for use in Dow Filmtec ® brand water treatment equipment, we make no representation as to whether using these filters and membranes is consistent with the warranty and specifications applicable to Dow Filmtec ® equipment.