Alkaline Remineralization 80GPD Reverse Osmosis System (OROS-80-ALK)

(1 customer review)


  • US made calcite remineralization filter to increase water alkalinity/pH (6th stage)
  • 80 gallons per day (gpd) reverse osmosis membrane
  • Calcite filter neutralizes purified water acidity to enhance taste and provide purified alkaline water
  • Designed to fit inside most under-sink cabinets
  • Color-coordinated quick connect tube fittings
  • Non-Air-Gap Faucet

The Olympia Water Systems 6-Stage Reverse Osmosis water filter system was designed and tested to provide clean, high-quality drinking water at your home or business. US made calcite remineralization filter to increase water alkalinity/pH (6th stage).

DIY installation manual

Easy Install/Maintenance

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

NSF testing

Designed & Tested for Durability

In accordance with NSF/ANSI 42, the OROS-80 system was tested at 300 psi for 15 minutes, and 100,000 bursts of 150psi.

olympia customer support

Lifetime Customer Support

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

NSF Certification

OROS-80-ALK has not been evaluated to NSF/ANSI standards 42 and 58. The OROS-80-ALK is the combination of OROS-80, which is a NSF certified system (NSF/ANSI 42 for the reduction of Chlorine, Taste and Odor and NSF/ANSI 58 for the reduction of Total Dissolved Solids), with OROS-ALK, an alkaline filter that has not been evaluated to NSF/ANSI standards 42 and 58. *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” D x 20” H
Tank Dimensions 12” W x 12” D x 18” H
Tank Capacity 3.2 Gallons
System Package Weight 28 lbs
UPC 859276006069

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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.