50GPD Pro Series Reverse Osmosis System (OWPS-50)


  • 5-stages of filtration
  • 50 gallons per day (gpd) reverse osmosis membrane
  • Designed to fit inside most under-sink cabinets
  • Color-coordinated quick connect tube fittings

In stock

Olympia Water Systems Reverse Osmosis Water Filtration System is designed and tested to provide clean, high-quality drinking water at your home or business. The OWPS-50 is a 50GPD reverse osmosis system that features pre-filter direct connection adapters to reduce the number of tubing connections on the system. The stage-5 filter and tank connections on the OWPS-50 use a standard size 1/4″ quick connect tee in place of the 1/4″ quick connect stem run tee used on all other Olympia systems.

DIY installation manual

Easy Install/Maintenance

Installing the system is easy with our step-by-step installation and maintenance guide with full-color photos.

olympia customer support

Lifetime Customer Support

USA based customer service/technical support through email and phone.

NSF Certification

The OWPS-50 has not been evaluated to NSF/ANSI standards 42 and 58. The OWPS-50 is comprised of the same parts as the OROS-50, which is a NSF certified system (NSF/ANSI 42 for CTO and 58 for TDS), with additional connection adapters that have been certified to NSF/ANSI standards 58 for Material Requirements and Structural Integrity Requirements. *For details about our NSF listing, please visit our FAQ page.

High-Quality Water Purification

Our reverse osmosis systems remove impurities and contaminants from the water in your home or business to produce fresh, pure drinking water. Based on manufacturer testing, our reverse osmosis membranes remove the following:

  • Radium 226/228
  • Chromium (Hexavelent & Trivalent)
  • Selenium
  • Copper
  • Turbidity
  • Arsenic
  • Fluoride
  • Barium
  • Lead
  • Cadmium

Multi-Point Quality Control

quality control flow chart

Feed Water Pressure 50-100 PSI | 344-689 kPa
Feed Water Temperature 50-100° F | 5-38° C
Filtration System Dimensions 16” W x 7.5” D x 20” H
Tank Dimensions 12” W x 12” D x 18” H
Tank Capacity 3.2 Gallons
System Package Weight 26 lbs
UPC 859276006076

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30 Day Money-Back Guarantee

Olympia Water System products have a 30 day money-back guarantee from the date of purchase. All return shipping fees are the customer’s responsibility unless the return is due to manufacturer error or defect. For details on our Return Policy and Product Warranty please visit our Terms & Conditions and Warranty pages.


We ship to addresses within the United States (48 continental states, Alaska, Hawaii & Puerto Rico). Shipments within the 48 continental states will be shipped via UPS Ground or USPS. Shipments to Alaska, Hawaii & Puerto Rico will be shipped via USPS only. Shipping discounts are only applicable to orders with shipping addresses located in the 48 continental states of the United States. In-stock items will be shipped within 2-3 business days after your order has been placed. Please inspect shipments for damage at the time of delivery.