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 Factory System 5000 Reverse Osmosis Water Filters

Water Factory System 5000 Reverse Osmosis Water Filters

Water Factory System 5000 RO Reverse Osmosis Compatible Premium Replacement Water Filters and RO Reverse Osmosis Membranes

Replacement water faucets, accumulator holding water tanks, water filter cartridges, RO membranes, O-rings, Filter Housing Spanner Wrenches, Valves, Water Pumps and reverse osmosis drinking water system replacement parts.

  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
  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
  3. DESAL - TFM-18 RO Reverse Osmosis Membrane #1220188 GE Osmonics -1000
    Desal ® TFM-18/T112-18 RO reverse osmosis membrane # 1220188 GE Osmonics
    Desal ® TFM-18 GE Osmonics - 18 GPD (gallons per day) TFC Style reverse osmosis membrane - Fits Standard Size Membrane Housing. # 1220188. Pentair ® / GE Osmonics ® 18 GPD Thin Film Reverse Osmosis Membrane Model # TFM-18 - Part # 1220188. THE DESAL TFM-18 HAS BEEN DISCONTINUED AND IS NO LONGER AVAILABLE. IF YOU ORDER THE DESAL TFM-18 YOU WILL RECEIVE THE T112-18. Learn More
    $89.99 Special Price $49.99 As low as $39.99
  4. Pentek SW-1A # 150539 SW1 Slim Line Water Filter Housing Spanner Wrench
    Pentek SW-1A # 150539 SW1 Slim Line Water Filter Housing Spanner Wrench Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands
    Pentek SW-1 # 150539 SW1 Slim Line Water Filter Housing Spanner Wrench Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. SW-1 Water Filter Housing Wrench. Fits 4" Slim Line Housings. (Slim Line Housings Have A 3 1/2" diameter "O" Ring) Ametek # 150294 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. Fits most standard style RO systems. Replaces 150294. 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. Order New O-rings And Be Sure To Lube Them With Dow 111 Silicone Sealant To Prevent Leaks Learn More
    $9.99 Special Price $6.99 As low as $4.99
  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
  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
  7. 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
  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
  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
  10. GGN-Tank-PL3-1000
    3 Gallon Water Storage Tank for RO Reverse Osmosis Systems GGN-Tank-PL3 Plastic Water Tank
    GGN-Tank-PL3- Plastic 3 Gallon Tank. UPC #850901003507 3 Gallon Water Storage Tank for RO Reverse Osmosis Systems GGN-Tank-PL3 Learn More
    $64.99 Special Price $44.91
  11. Replacement Non-Air Gap Pure Water Faucet For Water Filter Systems
    Replacement Non-Air Gap Pure Water Faucet - Calif. Low Lead Level
    Replacement Non-Air Gap Pure Water Faucet - Calif. Low Lead Level. Has one single tube connection. 7" high. Long reach - Extends 5 1/2" from center of faucet. Learn More
    $34.99 Special Price $19.99 As low as $14.99
  12. Replacement Air Gap Faucet For RO Reverse Osmosis Pure Water Systems
    Replacement Air Gap Faucet For Reverse Osmosis Pure Water Systems
    Replacement Air Gap Faucet For Reverse Osmosis Pure Water Systems - Calif. Low Lead Level - Usually used in conjunction with 3/8" Drain saddle. Has 3 line connections - one for the drain, one for the pure water to dispense and one for the waste water from the RO system. For use where required by code. 7" high. Long reach - Extends 5 1/2" from center of faucet. Learn More
    $59.99 Special Price $29.99 As low as $22.99
  13. UV-SS2-1000
    UV-SS2 1 Gallon per Minute UV Ultraviolet Water Sterizer
    304 Stainless Steel 1 GPM UV Assembly With 1/4" FNPT Connections. 6 watt Philips Lamp, transformer and individually boxed Learn More
    $99.99

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

* WATER FACTORY ® IS THE REGISTERED TRADEMARK OF 3M FILTRATION, THE MANUFACTURER OF WATER FACTORY ® BRAND WATER TREATMENT EQUIPMENT. THE REPLACEMENT FILTERS AND MEMBRANES LISTED ABOVE ARE MANUFACTURED BY 3M WATER FACTORY AS SO NOTED. WATER FACTORY REVERSE OSMOSIS DRINKING WATER SYSTEMS WERE ALSO MANUFACTURED AND SOLD UNDER THE CUNO BRAND NAME. WE ALSO OFFER COMPATIBLE REPLACEMENT SEDIMENT WATER FILTERS, REPLACEMENT CARBON BLOCK WATER FILTERS, GAC CARBON FILTERS, INLINE POST FILTERS, RO REVERSE OSMOSIS MEMBRANES, PRE FILTERS, FAUCETS, WATER TANKS, VALVES, PUMPS, UV ULTRAVIOLET AND WATER TESTING SUPPLIES FROM VARIOUS OTHER MANUFACTURERS FOR DISCONTINUED CUNO WATER FACTORY DRINKING WATER SYSTEMS.