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Learn to increase the GPD capacity size of your reverse osmosis membrane

We frequently get questions about increasing the GPD capacity of the reverse osmosis membrane on RO systems. This will not only increase the daily production capacity, but more importantly, it will increase the speed at which the RO water is produced. This allows for better assurance that there is adequate water available when desired, even during heavy use times of the day. It is also important to have adequate flow available for the ice maker when it calls for water. A starved ice maker can burn out. Be sure to read more about Flow Restrictors.

This is the same basic procedure for updating a "proprietary" RO membrane to a standard size and style of membrane. Many owners of "proprietary" style RO systems convert their systems to use the standard size and configuration that will be less expensive and easier to find.

The membrane upgrade is very simple on most reverse osmosis systems. Simply replace the membrane with the desired capacity and the correctly sized matching flow restrictor. These must be matched to keep the proper balance between waste water and pure water. Mis-matching can either cause excessive waste to the drain or premature membrane fouling.

This is also a great conversion if your reverse osmosis system has a non-standard size membrane and housing. In this case, simply replace your housing with the standard size one shown below. This works on all systems other than those that use a "manifold' system. A manifold system is one that makes the connections in the plastic head without using tubing to connect the separate components. Manifold systems must use the original size membrane.

  1. Regular Price: $33.99

    Special Price $19.99

    As low as: $14.99
    150 ml Premium inline reverse osmosis membrane flow restrictor - Our in-line capillary flow restrictors are simple to install. Simply push the 1/4" poly tube firmly into the quick connectors and you are done. Be sure that you order the flow restrictor size to match your reverse osmosis membrane size. Arrow on side points toward the drain. Very simple to install. Learn More
  2. Regular Price: $34.99

    Special Price $19.99

    As low as: $16.99
    Standard size RO reverse osmosis membrane housing - 90° Ports with 1/8" FNPT Threads - Includes New O-rings and 3 90° 1/4" Jaco Fittings For 1/4" O.D. Tube. Upgrade to the optional John Guest Quick Connectors. The end with a single port is the inlet feed water. On the end with two ports the center port is the permeate (product) water. The offset port is the brine (waste). Learn More
  3. Regular Price: $33.99

    Special Price $19.99

    As low as: $14.99
    Premium inline reverse osmosis membrane flow restrictor - Our in-line capillary flow restrictors are simple to install. Simply push the 1/4" poly tube firmly into the quick connectors and you are done. Be sure that you order the flow restrictor size to match your reverse osmosis membrane size. Arrow on side points toward the drain. Very simple to install. Learn More
  4. Regular Price: $129.99

    Special Price $84.99

    As low as: $59.99
    Dow Filmtec ® TFC 100 GPD RO reverse osmosis membrane - standard size 1.75" X 11.75" Extra fast recovery and high production flow rate.

    Learn How To Upgrade Your Reverse Osmosis Membrane Capacity

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  5. Regular Price: $119.99

    Special Price $74.99

    As low as: $49.99
    Dow Filmtec ® TW30-1812-75 (BW60-1812-75) TFC 75 GPD RO reverse osmosis membrane - standard size 1.75" X 11.75" Part # 114731 Learn More
  6. Regular Price: $84.99

    Special Price $69.99

    As low as: $54.99
    Dow Filmtec ® TW30-1812-50 TFC 50 GPD RO reverse osmosis membrane - standard size 1.75" X 11.75" Part # 80722 Learn How To Upgrade Your Reverse Osmosis Membrane Capacity Learn More
  7. Regular Price: $99.99

    Special Price $59.99

    As low as: $39.99
    Dow Filmtec ® TW30-1812-36 TFC 36 GPD RO reverse osmosis membrane - standard size 1.75" X 11.75" Part # 80719 Learn More
  8. Regular Price: $89.99

    Special Price $56.99

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    Dow Filmtec ® TW30-1812-24 24 GPD TFC RO reverse osmosis membrane - standard size 1.75" X 11.75" Part # 93430

    Learn How To Upgrade Your Reverse Osmosis Membrane Capacity

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  9. Regular Price: $69.99

    Special Price $44.99

    As low as: $35.99
    Desal ® TFM-18 GE Osmonics - 18 GPD (gallons per day) TFC Style reverse osmosis membrane - Fits Standard Size Membrane Housing. # 1220188 Learn More
  10. Regular Price: $69.99

    Special Price $49.99

    As low as: $35.99

    Desal ® CTA-16 GE Osmonics - 16 GPD (gallons per day) CTA reverse osmosis membrane - standard size. # 1201332 - 1224433

    Learn How To Upgrade Your Reverse Osmosis Membrane Capacity

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  11. Regular Price: $69.99

    Special Price $47.99

    As low as: $35.99
    Desal ® CTA-10 GE Osmonics - 10 GPD (gallons per day) CTA reverse osmosis RO membrane - standard size # 1201330 Learn More
  12. 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
  13. 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
  14. 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

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  15. 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
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.