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Lancaster CRO-212 Reverse Osmosis Replacement Water Filters

Lancaster CRO-212 Reverse Osmosis Replacement Water Filters

Lancaster ® CRO-212 Reverse Osmosis Compatible Replacement Water Filters And Reverse Osmosis RO Membranes

Compatible Replacement Filters For:

Lancaster ® CRO-212 Reverse Osmosis S7011 & S2019 Compatible Replacement Sediment Water Filter

Lancaster ® CRO-212 Reverse Osmosis S7025 * Lancaster ® Clack ® Compatible Replacement GAC Water Filter

Lancaster ® CRO-212 Reverse Osmosis S7206-06C & 7206W Compatible Replacement Polishing Water Filter

Lancaster CRO-212 ® Compatible CTA 16 GPD RO Reverse Osmosis Membrane

Lancaster CRO-212 RO system has a water line connecting the bottom portion of the RO Membrane Housing to the Prefilter at the top of the RO manifold. to  This system uses a standard size and style membrane.

  1. Regular Price: $11.99

    Special Price $6.99

    As low as: $5.79
    RS-21-SED5 Microline / Clack ® Compatible Sediment Water Filter For Reverse Osmosis RO Systems. S7011 Compatible. Be sure to replace the o-rings in all older systems. Be sure to use Dow 111 Silicone sealant to help prevent leaks. Learn More
  2. Regular Price: $17.99

    Special Price $11.99

    As low as: $9.79
    S7025 Microline / Clack ® GAC Carbon Water Filter (A1013473) For Reverse Osmosis RO Systems. Pre / Post filter. Be sure to replace the o-rings in all older systems. Be sure to use Dow 111 Silicone sealant to help prevent leaks. Learn More
  3. Regular Price: $19.99

    Special Price $12.99

    As low as: $9.49
    Omnipure ® K2333 2" X 6" GAC Inline Water Filter With Quick Connect Fittings. 50 per case, sold individually. Note: The connectors come with a "plug" in them for sanitary reasons. This keeps dirt and debris from entering the connector prior to use. To remove the plugs you push in on them and hold down the outer plastic ring, and then pull the plug out. The same method is used to remove the tubing when it comes time to replace the filter. 50 per case, sold individually. Order a case and save even more. Learn More
  4. Regular Price: $69.99

    Special Price $49.99

    As low as: $35.99

    Desal ® CTA-16 GE Osmonics - 16 GPD (gallons per day) CTA reverse osmosis membrane - standard size. # 1201332 - 1224433

    Learn How To Upgrade Your Reverse Osmosis Membrane Capacity

    Learn More
  5. Regular Price: $79.99

    Special Price $59.99

    As low as: $49.99
    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
  6. Regular Price: $8.99

    Special Price $5.99

    As low as: $3.99
    Microline / Clack ® S3069 o-ring. Fits Microline - Clack sump #S7029. Replace O-rings when changing the filters to help prevent leaks. Be sure to replace the o-rings in all older systems. Be sure to use Dow 111 Silicone sealant to help prevent leaks. Learn More
  7. Regular Price: $5.99

    Special Price $3.99

    As low as: $1.79
    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

    Learn More
  8. Regular Price: $12.99

    Special Price $8.99

    As low as: $6.99
    Microline - Clack Filter Housing Spanner Wrench - Fits standard Microline and Clack Systems. #3072 Learn More
  9. Regular Price: $49.99

    Special Price $37.99

    As low as: $17.99
    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
  10. Regular Price: $49.99

    Special Price $39.99

    As low as: $19.99
    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
  11. Regular Price: $7.99

    Special Price $4.99

    As low as: $2.49
    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

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 (total disolved solids) 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.   Let the tap water and reverse osmosis water run for a few seconds before drawing your sample.

See our selection of TDS meters under Water Tests.  Knowing the rejection rate is the only wat to know if it is time to replace your reverse osmosis membrane.


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.


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