Large selection of replacement water filters, reverse osmosis membranes, testing kits and water filter system repair parts. From one water filter or membrane to case quantity discounts.


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DuPure International Water Filters ®

DuPure International Water Filters ®

Simply replace your DuPure ® or Raine Pure Blue ® -60 Threaded Omnipure ® 2 stage water filtration system's -60 threaded head and start using the standard threaded Omnipure ® "Q" series replacement water filters at a lower cost than the -60 thread.

Since both systems use John Guest ® quick connectors it is very easy to install the replacement standard threaded head. Keep your old DuPure or Rayne faucet and feed valve. See information on how easy it is to use ® John Guest quick connectors.

Easy TDS Membrane Performance Calculator
See If It is Time To Replace Your Membrane

Simply enter your Feed Water TDS and RO Water TDS into the boxes above and click "Submit". The percentage of TDS Rejection will be displayed. We normally recommend membrane replacement once you drop below 75%. This may vary in areas with high TDS in the feed water.

See our selection of TDS meters under Water Tests

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.