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      The Pentair GRO 1:1 saves water by producing half the waste-water of standard RO systems. 

    • $384.55

      108 available for immediate delivery

    Do your homework before getting a filtration system. Waterworld USA systems are probably the best bang for your buck. Premium systems and customer service is spot on. You can install it yourself if you’re handy but I hired an installer to save myself the hassle.

    Eric T.

    Low Waste Quick Connect 50 or 75 GDP Encapsulated Membrane

    1-1 Ratio of Purified Water

    38” Tank to Faucet line for higher flow

    Makes 50 or 75-Gallons

    Made In USA by Waterworld USA

    1 Year Warranty

    TWICE as efficient over standard reverse osmosis membranes – less waste • Low Waste Quick Connect 50 or 75 GDP Encapsulated Membrane (replaced in seconds with no tools) • 1:1 Ratio of Purified Water to Waste Water (highly efficient) • Makes 50 or 75 Gallons Per Day • 3/8” Tank to Faucet line for higher flow • Made In USA by Waterworld USA

    Technical Specifications

    • Production: 50 or 75 GPD
    • Membrane Type: TFC
    • 1st Stage: 5 micron Spun Polypropylene Sediment Filtr
    • 2nd &3rd Stage: Coconut Shell 5 micron carbon block
    • 4th Stage: 50 GPD or 75 GPD Low Waste RO Membrane with 1:1 Ratio
    • 5th Stage: Inline GAC Carbon Fittings Type: Quick Connect
    • Fittings Type: Quick Connect
    • TDS Rejection: 96%
    • Recovery Rate: 50%
    • Tank Capacity: 3.2 Gallons
    • System Dimensions WxDxH: 15.5”x5.75”x15.5”
    • Tank Dimensions DxH: 11.5” x 16”
    • Shipping Weight: 31 Lbs
    • Shipping Dimensions:20”x19”x19”

    The Pentair GRO 1:1 reverse osmosis system is warranted to be free from defects in materials and workmanship under normal
    use within the operating parameters listed below. For a period of two years from the date of purchase Pentair GRO 1:1 will
    repair or replace any part of the reverse osmosis system with the exception of the filters and electrical components if any.

    Pentair GRO 1:1 assumes no responsibility for incidental or consequential damages; for damages arising out of misuse of the
    product or the use of any unauthorized attachment; for damages resulting from improper installation or for damages resulting
    from the use of the product with a defective plumbing system.

    In no event shall Pentair GRO 1:1 be liable for any direct, indirect, special, punitive, incidental, exemplary or consequential dam-
    ages, attorney’s fees or any damages whatsoever, even if Pentair GRO 1:1 has been previously advised of the possibility of such

    damages, whether in an action under contract, negligence, or any other theory, arising out of or in connection with the use,
    inability to use, or performance of the Pentair GRO 1:1 system.

    Pentair GRO 1:1 is not responsible or liable for damage to any part of the Pentair GRO 1:1 system because of misuse; misap-
    plication; negligence; alteration; accident; installation; neglect; misapplication; physical damage; fouling and/or scaling of the

    membrane by minerals; sediment; bacterial attack; or operation contrary to our instructions, incompatibility with accessories
    not authorized for use with the system, or damage caused by freezing, flood, fire, or Act of God.
    In no event shall Pentair GRO 1:1 its subsidiaries or affiliates, or their respective officers, directors, employees, representatives,
    dealers or agents be liable for special, incidental, consequential, punitive, indirect, or other special damages, including but not
    limited to, loss of data, use, or profits, however caused, whether for breach of contract, negligence or otherwise, and whether
    or not Pentair GRO 1:1 has been advised of the possibility of any such damages.
    Pentair GRO 1:1 assumes no warranty liability in connection with this reverse osmosis system other than that specified herein.
    This warranty is in lieu of all other warranties, expressed or implied, including warranties of fitness for a particular purpose.


    Pentair GRO 1:1 will provide warranty service under the following conditions:
    1) Contact your local dealer who will obtain return authorization instructions.
    2) Ship the unit or part freight prepaid for warranty evaluation or service with RMA # written on package.
    Systems or parts covered under the warranty shall be repaired (or, at our option replaced) and returned
    without charge.


    Operating Parameters:
    System Pressure 40-80psi*
    Temperature 4-38 C (39-100 F)
    pH Range 3.0 to 11.0
    Maximum feed TDS level 2000 ppm
    Maximum Turbidity 1.0 Net Turbidity (NTU)
    Chemical Parameters:
    Maximum Hardness 350mg/L (20 gpg)
    Maximum Iron (Fe) 0.1 mg/L
    Maximum Manganese (Mn) 0.05 mg/L
    Maximum Hydrogen Sulfide (H2S) 0.00 mg/L
    Maximum Chlorine (Cl2) 2.00 mg/L

    *A pressure regulator is recommended for feed-water pressure above 80 psi.
    Install it yourself by following the simple step-by-step guides below or have it professionally installed. Fill out the form or give us a call and we’ll help you find find the right installer in your area.