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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.

LOW PRICES and FAST SHIPPING SINCE 1999 !

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

RainSoft ® 9596 Reverse Osmosis System Water Filters

RainSoft ® 9596 Reverse Osmosis System Water Filters

RainSoft ® 9596 & 9596N Ultrefiner RO System Compatible Replacement Water Filters And Reverse Osmosis RO Membranes
  1. GE Osmonics ® Purtrex PX-5-978 Sediment Replacement Water Filter # 93023
    GE Osmonics ® Purtrex PX-5-978 Sediment Water Filter # 93023
    GE Osmonics ® Purtrex PX-5-978 5 Micron Sediment Water Pre Filter. True-graded density pure polypropylene depth replacement water filter. # 93023 9 7/8" long X 2 1/2" diameter. 40 per case, sold individually. Order a case and save even more. Learn More
    $8.99 Special Price $5.99 As low as $3.99
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  2. KX Matrikx ® 10/2 Carbon Block Water Filter # 10-250-190-975 Replacement-1000
    KX Matrikx ® 10/2 Carbon Block Water Filter # 10-250-190-975

    The KX 10/2 has been discontinued. If you order the KX 10/2 you will receive the GGN 10/2 Carbon Block Filter. 9 7/8" long X 2 1/2" diameter OD X 1 1/4" diameter ID. 25 per case, sold individually. Order a case and save even more.

    Learn How To Upgrade Your Reverse Osmosis Membrane Capacity

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    $17.99 Special Price $9.99 As low as $6.99
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  3. Rainsoft Ultrefiner Compatible TFC-RS9-22 RO Membrane 9568-21176 - 12448-17374-1000
    RainSoft ® Ultrefiner Compatible TFC-RS9-22 RO Membrane 9568 - 21176 - 12448 -17374
    RainSoft ® Ultrefiner Compatible TFC-RS9-22 Reverse Osmosis RO Membrane - TFC 22 Gallon Per Day Membrane - Ref # 12448, 17374, 21176 & 13018. (fits 9568, 9564, 9596, 9596N, UF22T & others) Learn More
    $69.99 Special Price $49.99 As low as $34.99
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  4. Omnipure CL-6RO-T/33 GAC Inline Replacement Water Filter-1000
    Omnipure ® CL-6RO-T/33 GAC Inline Water Filter
    Omnipure ® CL-6RO-T/33 GAC - 6" X 2" Carbon Inline Replacement Post Water Filter - GAC (granular activated carbon) Acid Washed Carbon - Should be changed at least every 12 months. 50 per case, sold individually. Order a case and save even more.

    Check Water Filter Connector Sizes

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    $17.99 Special Price $9.99 As low as $6.49
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  5. PENTEK- #151121- Slim-Line Water Filter Housing Replacement - 1000
    Pentek # 151121 O-Ring For Slim Line Water Filter Housing Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands
    Pentek # 151121 O-Ring For Slim Line Water Filter Housing Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. O-Ring For Slim Line Water Filter Housing. Buna-N FDA Grade. (Slim Line Housings Use A 3 1/2" diameter "O" Ring) Ametek # 151121 Same as Culligan OR-38 O-ring. Learn More
    $5.69 Special Price $4.99 As low as $3.00
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  6. Amtrol ® RO 4 Reverse Osmosis Replacement Accumulator Water Tank
    Amtrol ® RO 4 Reverse Osmosis Replacement Accumulator Water Tank
    Amtrol ® RO 4 RO Replacement Tank for Reverse Osmosis Systems. 4.4 Gallon (15" high X 11" diameter - including base) SS Stainless Steel Connection Stem - Connection Size: 1/4" MNPT - Valve Optional. Ball Shut Off Valve Optional. Learn More
    $79.99 Special Price $59.99 As low as $49.99
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  7. Air Pressure Gauge for Reverse Osmosis Water Accumulator Tanks -1000
    Air pressure gauge for reverse osmosis water accumulator tanks
    Air pressure gauge for reverse osmosis water accumulator tanks - Specially calibrated for reverse osmosis system tanks. Scale from 1 to 20 PSI. Large scale reading over small PSI range allows optimum accuracy. Just like car tires lose air pressure, so does the bladder of your reverse osmosis water accumulator tank. Improper tank air pressure will cause your system to operate improperly. This is a must for all reverse osmosis system owners. Learn More
    $24.99 Special Price $17.99 As low as $12.99
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  8. TDS Meter - Test For Total Dissolved Solids In Water - Reverse Osmosis Membrane Tester - TDS Meter
    TDS Meter - Test For Total Dissolved Solids In Water - Reverse Osmosis Membrane Tester - TDS Meter
    TDS Meter - Tester. The Only Way To Know If Your Reverse Osmosis RO Membrane Is Performing Correctly - Tests for TDS - Total Dissolved Solids. A Must For All RO System Owners. Compare Incoming Feed Water To Treated Water - Replace Membrane If Less Than 80% of TDS Is Being Removed - The lower the TDS level in the water, the more efficiently your body's cells actually get hydrated by the water that you drink. The higher the TDS levels in the water, the greater the probability of harmful contaminants that can pose health risks or hinder the absorption of water molecules on the cellular level. Simple to use for Reverse Osmosis membrane monitoring. We really like this tester and think that anyone who wants to know about the quality of their water should have one of these TDS Meter Testers to monitor their RO membrane. Learn More
    $49.99 Special Price $37.99 As low as $17.99
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  9. TDS Meter Inline Water Tester DM1 - HM Digital Dual Mode Reading
    TDS Meter Inline Tester- Dual Mode Reading - Easily Installs Inline - Very Simple To Use
    TDS Meter - Dual Mode - Installs Inline - Check the TDS level with the push of a button. Now you can easily check to make sure the water from your reverse osmosis system is top quality. Measure the tap water coming in vs. the purified water going out of your system at any time. Very easy installation. FEATURES Displays TDS levels of the feed water and product water with in & out electrode probes. Highly efficient and accurate due to its advanced microprocessor technology. Auto-Off function conserves battery power. The unit shuts off automatically after 10 minutes of non-use. Comes equipped with John Guest Quick-Connect T-fittings as shown. Installs quickly and easily. SPECIFICATIONS Range: 0-9990 ppm Accuracy: ±2% Always know if your RO membrane is performing correctly! Learn More
    $49.99 Special Price $39.99 As low as $19.99
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  10. Molykote-From DOw Corning- 111 Compound-6 Gram O-ring Silicone Lubricant & Sealant-Dow-111-5-gram-1000
    Dow Corning (Molykote) ® 111 6 gram O-ring Silicone Lubricant and Sealant - Be sure to lube your O-rings to help prevent leaks.
    Dow Corning/Molykote ® 111 6 gram O-ring Silicone Lubricant and Sealant - 6 gram pillow pack. (like a ketchup packet) Great O-ring sealant and lubricant. FDA and NSF approved. (Do Not Use Petroleum Jelly As It May Break Down O-rings Or Housings) This is the same premium grade silicone sealant and lubricant used in underwater photography cameras, scuba gear and other underwater applications that simply can't afford leaks. Why not use the best for your reverse osmosis or drinking water filtration system?

    Dow 111 Silicone MSDS Safety Sheet

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    $5.99 Special Price $3.99 As low as $1.79
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  11. Pro Products Sani System Water Filtration System Sanitizer
    Pro Products Sani System Water Filtration System Sanitizer
    Sani-System ® Pro Products is proud to introduce Sani-System, the first and only EPA product approved for sanitizing water softeners, RO units and Water Coolers. Alos NSF certified. Sani System is proven to kill 99.9% of E. coli, E. coli O157:H7, Staphylococcus aureus, Listeria monocytogenes and other harmful bacteria. It does not use chlorine, other oxidizers or acids that can harm water softener equipment parts. Use is simple; each dose comes in a pre-measured pouch. Just cut, pour and regenerate softener. No measuring, No mess! Sanitizing Equipment! Applications Interior Surfaces of Water Softeners, Reverse Osmosis (RO) Units, Ice Machines, Water Coolers, Water Holding Tanks and Pressure Tanks. Pro Products Sani System Sanitizer. 0.25 fl. oz. concentrate is perfect for your RO reverse osmosis drinking water system sanitizing.. Learn More
    $7.99 Special Price $4.99 As low as $2.49
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RainSoft 9338 Reverse Osmosis System Water Filters
RainSoft 9338 Reverse Osmosis ...

RainSoft 9338, 9738, compatible replacement water filters and reverse osmosis membranes. Shop and save online for replacement water filters and reverse osmosis membranes for Rainsoft Hydrefiner RO systems. Millions sold.

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RainSoft 9590 & 9593 Reverse Osmosis System Water Filters
RainSoft 9590 & 9593 Reverse ...

RainSoft 9590 compatible replacement water filters and reverse osmosis membranes. Shop and save online for RainSoft compatible replacement water filters and reverse osmosis membranes. Low prices and fast shipping online since 1999. Millions sold.

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RainSoft ® 9591 Reverse Osmosis System Water Filters
RainSoft ® 9591 Reverse ...

RainSoft ®* 9591 Ultrefiner RO Compatible Replacement Sediment Prefilter and Carbon Water Filters

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RainSoft ® 9596 Reverse Osmosis System Water Filters
RainSoft ® 9596 Reverse ...

RainSoft ® 9596 RO System Compatible Replacement Water Filters And Reverse Osmosis RO Membranes

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RainSoft ® 9598 Reverse Osmosis System Water Filters
RainSoft ® 9598 Reverse ...

RainSoft 9598 Compatible Replacement Water Filters and Reverse Osmosis Membranes for RainSoft Hydrefiner Reverse Osmosis Systems

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RainSoft ® Ultrefiner UF10 RO System & 21173 Water Filters
RainSoft ® Ultrefiner UF10 ...

RainSoft UF-10 21173 compatible replacement water filters and reverse osmosis membranes. Shop and save online for RainSoft Hydrefiner compatible replacement water filters and reverse osmosis membranes.

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RainSoft ® Ultrefiner UF22, UF22T, 21176 & UF50, UF50T & 21179, 21191 Water Filters
RainSoft ® Ultrefiner UF22, ...

* Rain Soft Ultrefiner ® UF22T and UF50T RO System Compatible Replacement Water Filters And Reverse Osmosis RO Membranes - RainSoft 21176 Hydrefiner

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

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.

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

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