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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 ® 9590 & 9593 Reverse Osmosis System Water Filters

RainSoft ® 9590 & 9593 Reverse Osmosis System Water Filters

RainSoft ® 9590 & 9593 Ultrefiner Reverse Osmosis System Compatible Replacement Water Filters And Reverse Osmosis RO Membranes
  1. 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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  2. 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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  3. Pro Products Sani System Sanitizer
    Pro Products Sani System Sanitizer
    Pro Products Sani System Sanitizer. 0.25 or 0.5 fl. oz. concentrate. 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. 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. Sani-System is now NSF certified! This is the best sanitizing solution available anywhere! Stock up and save. Learn More
    $7.99 Special Price $4.99 As low as $2.49
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  4. 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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  5. 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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  6. 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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  7. 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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  8. RainSoft Hydrefiner P-12- Compatible Replacement Water Filter for #9875 - 9879, 17561, P12, 17366, and 13199 - Lifestyle Photo 1-1000
    RainSoft ® Hydrefiner Compatible P-12 # 9875 - 9879 17561, P12, 17366 13199 Replacement Water Filter
    RainSoft ® Compatible P-12 # 9875 P12, Replacement Water Filter - Fits 9878, 9879 & Other Hydrefiner Systems - # 17561, 17366 , 13199. 6" long by 4 9/16" diameter. - 1/2" UNS Compression Female Threaded - Installation Note: The threaded part in the top of the housing cap is a "nipple". It may come out with the filter or with the housing. Whichever one it is in after the filter is removed the nipple can then be taken from the other item. It is just a small section of threaded tube. 12 per case, sold individually. Order extras and save even more. Learn More
    $89.99 Special Price $48.99 As low as $26.99
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  9. C Shaped Open End Universal Style Water Filter Sump Spanner Wrench
    C Shaped Open End Universal Style Water Filter Sump Spanner Wrench
    C Shaped Open End Filter Wrench - Universal "C" style wrench for all standard size and Slimline water filter housings. 3 5/8" opening. Only for use in loosening filter housings, never to tighten. Overtightening may cause damage to the O-rings and make re-opening VERY difficult. Hand tighten only. For really stubborn filter housings our technicians will use two wrenches together for maximum power where one wrench might break or not do the job. Our techs know the tricks. Learn More
    $9.99 Special Price $6.99 As low as $2.99
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RainSoft ® 9338 Reverse Osmosis System Water Filters
RainSoft ® 9338 Reverse ...

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

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

RainSoft 9590 compatible replacement water filters and reverse osmosis membranes. Shop and save online for RainSoft compatible replacement water filters and reverse osmosis membranes.

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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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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.

SEE OUR ONLINE HELP GUIDE

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