Loading... Please wait...

Our Newsletter

Premier 521934 6-Stage Reverse Osmosis System

  • Image 1
  • Image 2
Out of Stock - Estimated Availiblity March 26th-27th
31.00 LBS

Product Description

Model# WP-ST6DM. Item Number 521934

Download your Product Manual

The NEW Watts Premier Six Stage Reverse Osmosis System provides high quality water at an affordable price. This new High Production Reverse osmosis system is designed with two parallel 75 gallon per day reverse osmosis membranes which provide faster RO water production than a single 150 GPD membrane can provide alone. This complete reverse osmosis system comes with all hardware required for a typical installation, including a chrome finish reverse osmosis faucet and a slimmer/taller storage tank which takes up less cabinet area as well as ensures availability of RO water on demand. It is perfect for home, office, as well as hydroponics and aquatic tanks. This reverse osmosis system filters your water with six stages of filtration.

  • Reverse osmosis filtration system
  • A Space Saving 4-gallon storage tank
  • Automatic shut off valve shuts off water to system once storage tank fills
  • Chrome faucet
  • 6 stages of filtration
  • Easy install with Adapt-A-Valve supply line adapter
  • Heavy duty system mounting bracket
  • MFG Brand Premier


* This product is intended for use only on water supplies that have been shown to be at or below the referenced concentration and valency of arsenic.

Filtration Stages

  • Filter Stage 1 - 5 Micron Sediment Filter
    - This filter traps particulate matter such as dirt, rust, sand, silt and sediment that will affect the taste and appearance of your drinking water.
  • Filter Stage 2 - 5 Micron Coconut Shell Carbon Block Filter
    - This filter is a five micron coconut shell carbon block filter that provides reduction of chlorine, chloramine and other materials in your water that can cause bad taste and odors
  • Filter Stage 3 - 5 Micron Coconut Shell Carbon Block Filter
    - This second five micron coconut shell carbon block filter is for additional reduction of chlorine and chloramines and acts as a pre-filter to the reverse osmosis membrane
  • Filter Stage 4  & 5 - 75 GPD (gallons per day) Membrane
    - High production thin film composite membrane.
    - 4th and 5th stages two parallel flow membranes are heart of the reverse osmosis system.
      These membranes are semi permeable membranes which filter your water down to 1/10,000 of a micron. This will effectively reduce TDS (total dissolved solids), Sodium and a wide range of contaminants
  • Filter Stage 6- High Quality Carbon Post filter
    - the final stage filter in the system is a high quality GAC (Granular Activated Carbon) final filter. This filter acts as a final polishing filter when water is leaving the storage tank and is dispensed out of the reverse osmosis faucet.


Assembled Depth (in.) 6.0 in Assembled Height (in.) 14 in
Assembled Width (in.) 14.0 in Automatic shutoff Yes
Color/Finish Blue  Filter Housings Faucet Included Yes
Filter change indicator No Filtration method Reverse Osmosis
Fitting size (in.) 1/4 inch Fitting style Compression connect
Installation kit included Yes Item Package Type Cardboard Container
Manufacturer Warranty 1 year limited warranty Maximum feed water pressure (psi) 100
Maximum feed water temperature (F) 100 Maximum filtered water flow (gallons per day.) 150
Minimum feed water pressure (psi) 40 Minimum feed water temperature (F) 40
NSF Listed No Number of stages 6
Product Depth (in.) 6 Product Height (in.) 12.0 in
Product Weight (lb.) 26 Product Width (in.) 4
Water Filtration Technology Reverse Osmosis Water Filtration System Type Under Sink

Note: Recommended hardness not to exceed 10 grains per gallon, or 170ppm. System will operate with hardness over 10 grains but the membrane life may be shortened. Addition of a water softener may lengthen the membrane life.

The operating pressure in your home should be tested over a 24 hour period to attain the maximum pressure. If it is above 100 psi then a pressure regulator will be required.


Additional Information

premierh2o-mi-contact-reading.pngInstallation Instructions

premierh2o-mi-contact-reading.pngTroubleshooting guide

premierh2o-mi-contact-reading.pngReplacement Filters



For warranty information on this product, please call our Customer Service Center at 1-800-752-5582


Shipping Options

Most orders ship within 3 business days

the final stage filter in the system is a high quality GAC (Granular Activated Carbon) final filter. This filter acts as a final polishing filter when water is leaving the storage tank and is dispensed out of the reverse osmosis faucet.


Find Similar Products by Category

Write your own product review

Product Reviews

  1. happy repeat customer

    Posted by John Flatley on 18th Feb 2014

    We replaced an 11 year old 5 stage with this 6 stage. Happy to have a newer unit even though there was nothing wrong w/old one. I recommend it.

  2. Great System

    Posted by Unknown on 28th Jan 2014

    Installation of the system is very straight forward and clear to understand. System has nice faucet and large holding tank. Had it running for a week, with a large family, and have not run out of great tasting water yet.