Reverse Osmosis System Filters, RO Membranes and Parts

GoldLine 50 Water Filters

GoldLine 50 Water Filters

Goldline 50, Valueline, IWW, GWW & Good Water Compatible Replacement Water Filters & TFC Reverse Osmosis Membranes - 5 Stage RO Drinking Water System

3 vertical filter housings, one top mounted horizontal inline GAC carbon post filter and one top mounted standard size horizontal RO membrane housing.

The Goldline 50, 5 Stage Reverse Osmosis System with 50 GPD (gallons per day) RO Membrane will make your water delicious and refreshing. Perfect for making hot or cold beverages including coffee, teas, and juices. Intensifies flavors of sauces, soups and holiday dishes by removing metals excess of minerals and salts.

  • 2 inch by 10 inch Inline GAC Postfilter
  • 50 GPD RO Reverse Osmosis Membrane
  • Two Carbon Block Pre-Filters 
  • 5 Micron Osmonics Sediment Prefilter
  • John Guest® quick connect fittings 
  • 3/8” Tubing from tank to faucet
  • Airgap lead free faucet 
  • 3.2 gallon NSF storage tank

Goldline 50 Reverse Osmosis System Brochure
Goldline 50 Reverse Osmosis System Owner's Manual


STAGE 1 (vertical) - 5 Micron Sediment Pre Filter - Replace Every 3-6 Months

STAGE 2 (vertical) - 10 Micron Carbon Block Pre Filter - Replace Every 12 Months

STAGE 3 (vertical) - 10 Micron Carbon Block Pre Filter - Replace Every 12 Months

STAGE 4 (horizontal) - Reverse Osmosis Membrane: Choose a membrane and matching flow restrictor below.  Replace when indicated by testing TDS (total dissolved solids)

STAGE 5 (horizontal) -  GAC Inline Post Filter (granular activated carbon) - Replace Every 12 Months

See Typical 5 Stage RO Installation Diagram

John Guest Quick Fittings and Connector Instructions

Water Filter Connector Size Selection Guide

Water Filter Installation Guide

Water Filter Change Guide

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Be sure to check our Parts Department for important parts such as TDS Testers For Reverse Osmosis Membranes, Replacement Tanks, O-rings , Filter Housing Wrenches, Faucets, Pumps, Fittings, UV Systems and more parts for your reverse osmosis pure water filtration system.   View maintenance and servicing tips online at our Installation & Trouble shooting Guide.

* Goldline ® is the registered trademark of Goldline GWW, the manufacturer of Goldline ® brand water treatment equipment. The replacement filters and membranes listed above are not manufactured or endorsed by Goldline. Rather, these filters and reverse osmosis membranes are manufactured by other companies. While these filters and ro membranes are compatible for use in Goldline 50 ® reverse osmosis systems and water treatment equipment, we make no representation as to whether using these filters and membranes is consistent with the warranty and specifications applicable to Goldline-50 ® water filter equipment. This includes compatible replacement water filters for replacement Carbon Block Water Filters, GAC Carbon Filters, AICRO Inline Post Filters, RO Reverse Osmosis Membranes, Sediment Pre Filters, faucets, Pro-4000 water tanks, valves, pumps, UV Ultraviolet and water testing supplies.