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.


99.5% Of All Items In Stock For Same Day Shipping!

Sears UltraFilter RO System Filters ®

Sears UltraFilter RO System Filters ®

* Sears Kenmore UltraFilter, Whirlpool, EcoWater and Ecodyne ® compatible replacement water filters and RO reverse osmosis membranes.

Sears Kenmore * UltraFilter 150, 625.385700, 42-38476

Sears Kenmore * UltraFilter 300, 625.384720, 42-38476

Sears Kenmore * UltraFilter 350, 625.385720, 42-38476

Sears Kenmore * UltraFilter 500, 625.384750, 42-38476

Sears Kenmore * UltraFilter 550, 625.385750, 42-38576

Whirlpool WHER 12 Reverse Osmosis System

Whirlpool WHER 18 Reverse Osmosis System

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.

* Sears UltraFilter ® is the registered trademark of Sears UltraFilter, the manufacturer of Sears UltraFilter ® brand water treatment equipment.  The replacement filters and membranes listed above are not manufactured or endorsed by Sears UltraFilter.  Rather, these filters and membranes are manufactured by other companies.  While these filters and membranes are compatible for use in Sears UltraFilter ® 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 Sears UltraFilter ® equipment.