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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Water-Safe RO-10B Water Filters ®

Water-Safe RO-10B Water Filters ®

Water-Safe RO-10B ® 3 stage compatible replacement water filters and RO reverse osmosis membranes 

1st Stage  5 Micron Sediment Pre Filter - Replace Every 3-6 Months 
2nd Stage 10 GPD CTA Reverse Osmosis Membrane - This membrane is discontinued - Upgrade to the 16 GPD membrane to continue using this system
3rd Stage 5 or 10 Micron Post Filter - Replace Every 12 Months 


  1. Pentek NCP-10 # 155367 NCP10 Taste & Odor GAC Carbon Replacement Water Filter Cartridge
    Pentek NCP-10 # 155367 NCP10 Taste & Odor Water Filter Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands
    Ametek / US Filter / Plymouth / Pentek / Culligan / Kleen Plus / American Plumber / Bruner / Many Other Brands Compatible NCP-10 Pleated Carbon-Impregnated Polyester 10 Micron Taste & Odor Water Filter. A nice upgrade from the C-1 (155002). 9 3/4" long X 2 1/2" diameter. 24 per case, sold individually. Ametek # 155367 NCP Series cartridges are constructed from a carbon-impregnated non-cellulose media. They offer sediment-filtration, as well as taste, odor and chlorine reduction in one cartridge. Unlike cellulose cartridges, NCP Series cartridges are resistant to both bacterial attack and biofilm buildup allowing them to be used for municipal and non-chlorinated water applications. Pleats provide additional surface area for high dirt-loading capacity, while maintaining minimal pressure drop. This combination of pleated polyester media and carbon filtration produces an outstanding filter cartridge with extended service life. NCP Series cartridges are an excellent polishing filter, and are ideal for post reverse osmosis and well water applications. Order a case and save even more. Learn More
    $12.99 Special Price $8.99 As low as $6.99

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.

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