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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ExtraPure RO-450 Water Filters ®

ExtraPure RO-450 Water Filters ®

extraPure ®* RO-450 Compatible Replacement Water Filters And Reverse Osmosis RO Membranes For extraPure Reverse Osmosis RO Pure Drinking Water Systems

Compatible replacements for:

extraPure ®* RO-450 S7111 Sediment Pre Filter

extraPure ®* RO-450 S7128 Carbon Block Pre Filter

extraPure ®* RO-450 S7125 GAC Carbon Post Filter

extraPure ®* RO-450 S7206 Inline Post Filter

extraPure ®* RO-450 S1448RS RO Reverse Osmosis Membrane

extraPure ®* RO-450 RO Reverse Osmosis System S7128 Compatible Sediment & Carbon Block Pre Filter.  Also can be used in place of the extraPure ®* RO-450 S7111 Compatible Sediment Pre Filter.
extraPure ®* RO-450 RO Reverse Osmosis System S7125 Compatible GAC Carbon Post Filter for RO systems
extraPure ®* RO-450 RO Reverse Osmosis System S7206 Compatible Inline GAC Polishing Post Filter
extraPure ®* RO-450 RO Reverse Osmosis System Compatible S1448RS Membrane

If your extraPure RO-450 filter and membrane housings have this piece inside use a utility knife to cut this piece out and discard it.  Now you can use the filter cartridges listed below in your system.  This only needs to be done one time.

We can't find products matching the selection.

Easy TDS Membrane Performence 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.


* extraPure ® is the registered trademark of extraPure, the manufacturer of extraPure ® brand water treatment equipment.  The replacement filters and membranes listed above are not manufactured or endorsed by extraPure.  Rather, these filters and membranes are manufactured by other companies.  While these filters and membranes are compatible for use in extraPure ® brand water treatment equipment, we make no representation as to whether using these filters and membranes is consistent with the warranty and specifications applicable to extraPure ® equipment.