521934 Six Stage Reverse Osmosis System by Watts Premier




Collections: All, Reverse Osmosis

Product type: Reverse Osmosis

Vendor: Premier a Watts Brand

Tags: 6-Stage, Standard Design


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The high efficiency Premier Six Stage Reverse Osmosis System provides high quality water at an affordable price. This new Reverse Osmosis System is designed with two parallel 75 gallon per day reverse osmosis membranes that provide faster, more efficient Reverse Osmosis water production compared to a single 150 GPD membrane. A larger, space efficient, 4 gallon storage tank is included to ensure Reverse Osmosis water is always available on demand. The Premier Six Stage Reverse Osmosis System is perfect for home or office, as well as hydroponics and aquatic tanks.

The WP-ST6DM Reverse Osmosis Filtration System uses a 5-Stage Filtration based upon separate treatments.

  1. Sediment - A 5 Micron Sediment Filter traps sediment and other particles like dirt, silt and rust which affect the taste and appearance of your water.
  2. Carbon (2) - Runs through 2 stages of 5 Micron Carbon Block Filters reducing Chlorine, Chloramines and other materials that cause bad taste and odor.
  3. Membrane (2) - Runs through 2 stages of 75 GPD Semipermeable Membranes removing TDS, Sodium and a wide range of contaminants such as Chromium, Arsenic, Copper, Lead as well as Cysts, such as Giardia and Cryptosporidium.
  4. Carbon In-Line (GAC) - high quality In-Line Granular Activated Carbon (GAC) Final Polishing Filter is used after the water storage tank to remove any remaining chlorine or other chemicals that cause bad taste or odor before being dispensed. 

Click here to download your Product Manual.

Operational Parameters / Contents:

Parameters -

  • Operating Temperatures _ Max: 100°F (37.8°C) to Min: 40°F (4.4°C)
  • Operating Pressure _ Max: 100 psi (7.0 kg/cm) Min: 40 psi (2.80 kg/cm)
  • pH Parameters _ Max: 11 to Min: 2
  • Iron _ Max: 0.2 ppm
  • TDS (Total Dissolved Solids) _ < 1800 ppm
  • Turbidity _ < 5 NTU
  • Hardness _ Max: 10 Grains Per Gallon*

*System will operate with hardness over 10 grains per gallon but the membrane life may be shortened.

Contents -

  • Reverse Osmosis Filtration System
  • 4-Gallon Storage Tank
  • Module with one Full Set of Filters including (2) 75 GPD Membrane Pre-Installed
  • Standard Chrome, Non-Air-Gap Faucet
  • Adapt-A-Valve
  • Drain Saddle
  • Manual

Product Dimensions  -

(Due to the individual fittings the exact measurements may vary slightly.)

  • Rack and Cartridges (15.7" W x 20.3" H x 6.9" D)
  • Tank (19.3" H x 9.4" D)
  • MFG Brand Premier
  • Certified to NSF/ANSI 58 Certified Reverse Osmosis Units
  • Certified by WQA


    Reduction Claims Validated for this unit by WQA

    • Model #WP-ST6DM.  Item Number 521934
    Limited Warranty:
    • What your Warranty Covers - 

    If any part of your WPST6-DM Reverse Osmosis System is defective in workmanship (excluding replaceable filters and membranes), return unit after obtaining a return authorization (see below), less tank, within 1 year of original retail purchase, Watts Premier will repair or, at Watts Premier’s option, replace the system at no charge.

    • How to Obtain Warranty Service - 

    For warranty service, call 1-800-752-5582 for documentation and a return authorization number. Once the return authorization number has been created, ship your Reverse Osmosis unit (less tank) to our factory, freight and insurance prepaid, with proof of date of original purchase. Include a note stating the problem experienced and include your name, address and your return authorization number. No returns will be accepted without the proper return authorization number. Watts Premier will repair it, or replace it, and ship it back to you prepaid.

    • What this Warranty Does Not Cover - 

    This warranty does not cover defects resulting from improper installation, (contrary to Watts Premier’s printed instructions), from abuse, misuse, misapplication, improper maintenance, neglect, alteration, accidents, casualties, fire, flood, freezing, environmental factors, water pressure spikes or other such acts of God.

    This warranty will be void if defects occur due to failure to observe the following conditions:

      1. The Reverse Osmosis System must be hooked up to a potable municipal or well cold water supply.
      2. The hardness of the water should not exceed 10 grains per gallon, or 170 ppm.
      3. Maximum incoming iron must be less than 0.2 ppm.
      4. The pH of the water must not be lower than 2 or higher than 11.
      5. The incoming water pressure must be between 40 and 100 pounds per square inch.
      6. Incoming water to the RO cannot exceed 100 degrees F (40 degrees C.)
      7. Incoming TDS/Total Dissolved Solids not to exceed 1800 ppm.
      8. Do not use with water that is microbiologically unsafe or of unknown quality without adequate disinfection before or after the system

    This warranty does not cover any equipment that is relocated from the site of its original installation. This warranty does not cover any charges incurred due to professional installation. This warranty does not cover any equipment that is installed or used outside the United States of America and Canada.