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Watts Premier 500023 WP-5 Five Stage Reverse Osmosis System

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24.00 LBS
Calculated at checkout

Product Description

 Model# WP-5.  Item Number 500023

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The Watts Premier WP-5 (500023) Reverse Osmosis System is innovative in its one piece manifold design, thereby providing a seamless water path, effectively eliminating 17 different connections.  It is a 5 stage reverse osmosis system that is NSF tested and certified against ANSI/ NSF Standard 53 for the reduction of the claims specified on the performance data sheet.  The WP-5 System begins with stage 1, a five micron Sediment filter that traps particulate matter like dirt, rust, and silt that will affect the taste and appearance of your water.  Stage 2 is a five micron Carbon Block filter that provides a reduction of chlorine and other materials that cause bad taste and odors.  Stage 3 is an additional five micron Carbon Block filter which provides a greater reduction of chlorine (these are called PRE-filters because they filter in front of the reverse osmosis membrane).   Stage 4 is the heart of the reverse osmosis system, the RO Membrane. This semi permeable membrane will effectively reduces TDS (total dissolved solids), Sodium and a wide range of contaminants such as Percolate, Chromium, Arsenic, Copper and Lead. It will also remove over 99.95% cysts such as Giardia and Cryptosporidium.  Stage 5 is a high quality GAC final filter (this is called a final filter because it filters after the membrane).  This final filter is a polishing filter and is used in the last stage of filtration. 

  • Reverse osmosis filtration system
  • 3-gallon storage tank
  • Chrome airgap faucet
  • 5 stages of filtration
  • Adapt-A-Valve Water shut off valve
  • MFG Brand Premier
  • MFG Model# WP-5
  • MFG Part# 500023
  • Certified to industry standard, NSF/ANSI Standard 58
  • Califorina Certification 00-1452
  • Certified by WQA
  • 3 year warranty

Reduction Claims Validated for this unit by WQA:

  • Barium
  • Cadmium
  • Copper
  • Cyst
  • Fluoride
  • Hexavalent Chromium
  • Lead
  • Pentavalent Arsenic <= 300 ppb reduction
  • Radium 226/228
  • Selenium
  • TDS
  • Trivalent Chromium
  • Turbidity

* 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 
                           - Reduces Dirt, Sand and Rust
  • Filter Stage 2 - 5 Micron Carbon Block Filter
                           - Reduces Chlorine, Objectionable Tastes and Odor.
  • Filter Stage 3 - 5 Micron Carbon Block Filter
                           - Reduces Chlorine, Objectionable Tastes and Odor.
  • Filter Stage 4 - 24 GPD (gallons per day) Membrane
                          - High production thin film composite membrane.
  • Filter Stage 5 - Carbon Inline Post filter
                          - Enhance the water’s taste.

Replacement Filters:

Stage 1:  Changed Every 6 months
(1) 5 Micron Sediment filter (104017)

Stage 2 & 3: Changed Every 6 months
(2) 5 Micron Carbon Block filters (101009

Stage 4: Changed Every 2-5 years
WP5: (1) 24 GPD Membrane (560014) ** 
622052 250mL Flow Restrictor

Stage 5: Changed Every 12 months
(1) 10” Inline Final Filter (560010)

NOTE:  WP5-50 USES (1)  50 GPD Membrane 560018 
622055 500mL Flow Restrictor
Filter Kits:

6 Month Filter Kit
• (1) 5 Micron Sediment Filter
• (2) 5 Micron Carbon Block filters

Premium Plus Filter Kit
• (1) 5 Micron Sediment Filter
• (2) 5 Micron Carbon Block filters
• (1) 10" Inline Final Filter
• (1) Wrench

7-Pack Deluxe Replacement Kit
• (2) 5 Micron Sediment Filters
• (4) 5 Micron Carbon Block Filters
• (1) 10" Inline Final Filter

**Optional RO Membrane Upgrades:

Please Note: RO Membranes Not Included in any kits



Assembled Depth (in.)  6.0
Assembled Width (in.)  16.0 
Assembled Height (in.)  16.0
Unit Color/Finish  White Filter Housings 
Automatic shutoff  Yes
Filter change indicator  No
Faucet Included  Yes
Faucet Color Chrome
Filtration method  Reverse Osmosis 
Fitting size (in.)  1/4 in
Fitting style  Quick connect 
Installation kit included  Yes
Item Package Type  Cardboard Container 
Maximum feed water pressure (psi)  100
Minimum feed water pressure (psi)  40
Maximum feed water temperature (F) ,(C) 100° , 37.8°
 Minimum feed water temperature (F), (C) 40° , 4.5°
Maximum filtered water flow (gallons per day.) 24
Product Depth (in.)  6
Product Width (in.)  16
Product Height (in.)  16
Product Weight (lb.)  23
Number of stages  5
Water Filtration System Type  Under Sink
Water Filtration Technology Reverse Osmosis
NSF Listed  Yes
Manufacturer Warranty  3 year limited warranty 


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.png Troubleshooting guide

premierh2o-mi-contact-reading.png Replacement Filters



For warranty information on this product, please visit our online store support pages or call our Customer Service Center at 1-800-752-5582


Shipping Options

Most orders ship within 3 business days


Product Videos

Installing Your Premier 5 Stage RO Water Filtration System (01:02)
https://www.wattspremier.com Want high quality drinking water straight from your kitchen sink? With the Premier® 5 Stage RO Water Filtration System, the finest quality drinking water is always on hand. See how easy it is to setup and install your system and start enjoying bottled water quality from your kitchen in a matter of minutes.
  • Installing You...
    https://www.wattspremier.com Want high quality drinking water ...

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Product Reviews

  1. great unit

    Posted by Gary on 11th Feb 2014

    love it, works great, I can drink my water now.

  2. best water to date.

    Posted by Gary on 13th Dec 2013

    I got the unit in a few days, it took about 4 to 5 hours to install, which was not expected, since I already had a drain line working on my old unit. btw, I am a retired contractor, make of that what you will. In other words if you are not good with tools maybe you should not do this, or get very detailed instructions or a video on how to install. The output water spout, directs the water to a NON level area of my sink, thus I have to always HOLD the glass to fill it. BAD thing to have to do all the time. the water tastes good.

  3. Best water to date

    Posted by Gary M Phillips on 5th Oct 2013

    The install took longer than expected, about 3.5 hours. the water tastes excellent

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