Vertex Replacement 50 GPD Reverse Osmosis Membrane

Under Counter/Inline Filter Systems

SKU: MA-4203-PWM

Vertex - CERTIFIED Replacement 50 GPD Reverse Osmosis Membrane - Pure n Natural Systems

Vertex Replacement 50 GPD Reverse Osmosis Membrane

Under Counter/Inline Filter Systems

SKU: MA-4203-PWM

Translation missing: en.product.general.sale_price $76.95

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About this product

Replacement High Volume 50 Gallons per Day (GPD) RO Membrane

Certified to Reduced Contaminants

Arsenic, Barium, Cadmium, Chromium III & VI, Copper, Cysts, Fluoride, Lead, Nitrates, Nitrites, Radium 226 & 228, Selenium, TDS, Turbidity. Tested for structural integrity, chemical extraction and reduction of contaminants.

Used for the following under the counter/inline filter systems by Vertex PureWaterMachines:

For OPTIONAL use in the following PureWaterMachine RO Systems:

Replace RO Membrane every 2 years.


    About Reverse Osmosis

    City water treatment removes dirt and debris while adding chlorine to prevent the spread of diseases, producing unpleasant taste and odor in municipal water. However, it does not remove the dissolved minerals and contaminants from the water. With the increasing pollution of our surface and groundwater with natural or man-made contaminants such as nitrates, perchlorates, and pesticides, it is more important than ever to have a way to remove them at the point of use. The Standard Filtration System first uses a sediment filter to remove particles such as sand and rust as small as 5-microns. The second-stage activated-carbon filter eliminates chlorine and its taste and odor. The Reverse Osmosis filtration system removes an average of 95% of dissolved contaminants and minerals from the water at the molecular level including those that cause scale deposits.

    Typical Contaminant Removal Rates with Reverse Osmosis

    • Aluminum 86%
    • Arsenic 94%
    • Barium 96%
    • Bicarbonate 90%
    • Borate 30%
    • Bromide 87%
    • Cadmium 96%
    • Calcium 94%
    • Chloride 87%
    • Chromate 86%
    • Chromium 96%
    • Copper 98%
    • Cyanide 86%
    • Detergent 97%
    • Ferrocyanide 98%
    • Fluoride 87%
    • Herbicides 97%
    • Insecticides 97%
    • Lead 97%
    • Magnesium 96%
    • Manganese 95%
    • Mercury 96%
    • Nickel 98%
    • Nitrate 80%
    • PCBs 97%
    • Perchlorate 96%
    • Phosphate 96%
    • Potassium 87%
    • Radium 80%
    • Selenium 94%
    • Silicate 85%
    • Silver 93%
    • Sodium 87%
    • Spores 99.9%
    • Strontium 96%
    • Sulfate 97%
    • Thiosulfate 96%
    • Zinc 98%

    Factory Tests at 65psi and 77°. Actual rates may vary.

    Best for

    • Owners of 50 GPD reverse osmosis systems needing a fresh membrane to restore water purity
    • Homes and offices experiencing reduced flow rate, slow tank fill, or higher TDS readings
    • Users following a 2–3 year RO maintenance schedule for consistent performance
    • Anyone wanting to maintain effective reduction of dissolved solids, chemicals, and impurities
    • Installations where clean, great-tasting water is essential for drinking, cooking, coffee, and ice

    Specifications

    Installation tips

    • Shut off the water supply and open the RO faucet to relieve pressure before replacing the membrane.
    • Disconnect the tubing and remove the membrane housing cap.
    • Pull out the used membrane with needle-nose pliers if needed—discard after removal.
    • Insert the new 50 GPD membrane, ensuring the brine seal is properly seated in the housing.
    • Tighten the housing cap securely and reconnect all tubing.
    • Turn water back on and allow the system to flush for 2–3 minutes.
    • For best performance, let the RO tank fill completely, then drain once before normal use.

    Frequently asked questions

    How often should I replace a 50 GPD RO membrane?
    Typically every 2–3 years, or sooner if you notice reduced flow, poor-tasting water, or higher TDS readings.

    Will this membrane fit my RO system?
    It fits most standard 50 GPD RO housings. Check your current membrane label or system manual to confirm compatibility. A list of Vertex models are in the 'About this Product' section above. This replacement RO filter is for under counter/inline filter systems.

    What are signs my RO membrane needs replacement?
    Common signs include slow tank fill, noticeably reduced water flow, or TDS readings that are no longer dropping effectively.

    Do I need tools to replace the membrane?
    Most systems require only basic hand tools to remove the housing cap. No specialized equipment is needed.

    Do I need to replace filters when I replace the membrane?
    Pre-filters should be replaced on schedule. A clogged pre-filter can shorten membrane life, so pairing replacements is recommended.

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