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GE Merlin Water Filters ®

GE Merlin Water Filters ®

GE Merlin ® tankless RO reverse osmosis system and replacement water filters & reverse osmosis membranes

Replacments For:

GE ® Merlin Reverse Osmosis Tankless RO System Pre Filter #1237460 (#3038333)

GE ® Merlin Reverse Osmosis Tankless RO System Post Filter #1244746 (#255526-09)

GE ® Merlin Reverse Osmosis Tankless RO System RO Membrane #1238342 (Requires 2)

GE Merlin 10 Micron Sediment Pre Filter #1266690 - Use this optional sediment pre filter for extra sediment filtration.  Helps protect the filters and membranes in the GE Merlin system.


GE Merlin Service & Replacement Parts:
Aquatec ® Pump For GE Merlin Reverse Osmosis System - 110V and 220V
GE ® Merlin #1268260 Compatible Reverse Osmosis System Flush Kit
Inline Water Pressure Gauge For GE Merlin RO Systems
Sea Tech ® Valve 3551-0808  & 3550-1008 Quick Connect Fittings For GE Merlin RO System
GE Merlin O-rings For Merlin RO Reverse Osmosis System Filter Housings

GE Merlin Installation Manual

GE Merlin Application Guide

GE Merlin Performance Data Sheet

GE Merlin Sales Information Brochure
GE Merlin Ice Maker Bulletin
GE Merlin Warranty
GE Merlin Photo Spread
GE Merlin TDS Bulletin
  1. $599.99

    Discontinued - No Longer Available

    DISCONTINUED - But we still have replacement water filters, RO membranes and parts to keep your GE Merlin system is top operating condition. - GE ® Merlin Reverse Osmosis Tankless RO System - GE-RO-M750 #1255052 Point-of-use RO System. The Merlin tankless RO system for residential and light commercial applications is a breakthrough on-demand, continuous flow, RO system by GE Osmonics providing up to 720 gallons of purified water per day. Continuous flow - no storage tank necessary. Requires no pump or electricity. Includes air gap faucet. Uses line pressure only - >40 psi. 1/2 gpm permeate rate @ 50 psi. Compact design - fits easily under sink. Consistent TDS rejection and membrane efficiency. High recovery system - Multiple dispensing locations off one system. High durability Noryl and polypropylene construction provide years of dependable service. Engineered for the fewest number of connection points - less chance of leaks. System's support leg also serves as a handy sump wrench. This system requires a continuous, minimum 40-50 psi of pressure to operate properly. ANSI NSF 58 validated. WQA Gold Seal listed. Includes first set of filters and membranes. 17.05" wide x 20.34" tall x 9.68" deep.Learn More
  2. Regular Price: $34.99

    Special Price $22.99

    As low as: $19.99
    GE ® Merlin Reverse Osmosis Tankless RO System 5 micron Sediment / Carbon Pre Filter - #1237460 - The GE Merlin pre filter is a carbon and sediment pre filter combination that protects the membrane by pre filtering the water before it reaches the reverse osmosis membrane. 17" x 2.9". 3.75 GPM flow rate. The pre filter should be changed at least every 6 months, or more often in bad water areas. Learn More
  3. Regular Price: $29.99

    Special Price $18.99

    As low as: $16.99
    GE ® Merlin Reverse Osmosis Tankless RO System Post Filter #1244746 - The GE Merlin postfilter is a granular activated carbon filter that is the final filtering stage to your purified drinking water. 10.5" x 2.6". .75 GPM flow rate. The GE Merlin postfilter should be changed at least every 6 months. Learn More
  4. Regular Price: $139.99

    Special Price $99.99

    As low as: $84.99
    GE ® Merlin Reverse Osmosis Tankless RO System RO Membrane #1238342 - Replacement Membrane for the 720 gallon-per-day GE Merlin Tankless Reverse Osmosis System. The membranes should be changed at least every 2-4 years. The GE Merlin RO system requires two RO membranes. Each 18.75" x 3.16", Flow rate.of 25 GPM each. Priced per each membrane, requires 2 membranes. Learn More
  5. Regular Price: $29.99

    Special Price $17.99

    As low as: $15.99
    GE Merlin 10 Micron Sediment Pre Filter #1266690. Installs in place of the carbon prefilter when the feed water is not chlorinated. Traps excess sediment. Easy to install and replace. 5 Micron No Longer Available, Replaced By The 10 Micron. Learn More
  6. Regular Price: $9.69

    Special Price $6.99

    As low as: $4.99
    GE Merlin O-rings For Merlin RO Reverse Osmosis System Filter Housings Learn More
  7. Regular Price: $89.99

    Special Price $59.99

    As low as: $44.99
    GE ® Merlin #1268260 Compatible Reverse Osmosis System Flush Kit . 12" High x 7 1/2" Diameter. Free upgrade from the standard 2 gallon tank. Includes tank stand, 1/4" tank shut off valve, 6' of blue connection tube and instruction sheet. Learn More
  8. Regular Price: $21.99

    Special Price $14.99

    As low as: $9.99
    Sea Tech ® Valve 3550-1008 Quick Connect Fitting For GE Merlin RO System. Connects the GE Merlin reverse osmosis system to the inlet feed water line. 1/2" Tube in and out. Simple to install. Learn More
  9. Regular Price: $19.99

    Special Price $17.99

    GE Merlin Drain Boa Kit #1240564 for the GE Merlin RO Reverse Osmosis System Learn More
  10. Regular Price: $6.99

    Special Price $3.99

    As low as: $3.39
    John Guest Speedfit Plug In Stem Elbow Quick Connector For Water Filtration Systems. Easy to install and uninstall. Simply insert and this plug in eblow will create a 90 degree elbow corner turn. PI220808S, PI221208S, PI221212S, PI221616S. Learn More
  11. Regular Price: $18.99

    Special Price $12.99

    As low as: $9.49
    Sea Tech ® Valve 3551-0808 Quick Connect Fitting For GE Merlin RO System. Connects the GE Merlin reverse osmosis system to the inlet feed water line. 1/2" in and out. Simple to install. Learn More
  12. Regular Price: $12.99

    Special Price $9.99

    Aquatec 1/2" John Guest to 3/4" Quick Disconnect With Buna N O-ring For Merlin Pumps. Learn More
  13. $0.27
    John Guest ® Poly Tubing For Pure Drinking Water Systems - 1/4", 3/8" and 1/2" O.D. (Outer Dimension) High Grade Drinking Water Tubing. Speedfit quick connector compatible. Choose the 3/8" O.D. For Use With Optional Drain Saddle For Air Gap Faucet. Sold by the foot. Order 20 to get 20 feet. Learn More
  14. Regular Price: $299.99

    Special Price $229.99

    As low as: $209.99
    Aquatec ® Pump For GE Merlin Reverse Osmosis System - Aquatec engineering has created the perfect pump for the GE merlin RO reverse osmosis system. Make your GE Merlin system live up to its potential with a pressure booster pump. Increases flow and total GPD output. Improves TDS water quality. Pump output pressure is 65 PSI. 4 GPM. #5501-IVN2-V77D - 110V - Straight John Guest pump connection fittings included. Learn More
  15. Regular Price: $69.99

    Special Price $49.99

    As low as: $29.99
    TDS Meter Dual Mode Readings - Professional Grade - Easily Installs Inline - Very Simple To Use. Measure the tap water coming in vs. the purified water going out of your system at any time. Use the meter to determine when the filters need to be changed. Highly efficient and accurate due to its advanced microprocessor technology. Displays TDS levels of the Feed Water and Product Water with in & out electrode probes. Auto-Off function conserves battery power. The unit shuts off automatically after 20 seconds. Dual Range - Measures from 0-999 ppm, with a resolution of 1 ppm. Learn More
  16. 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
  17. 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
  18. Regular Price: $349.99

    Special Price $249.99

    Aquatec 230V Pump For GE Merlin Reverse Osmosis System Learn More
  19. 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
  20. 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
  21. Regular Price: $3.99

    Special Price $2.99

    GE Merlin Post Filter Bracket #1240633 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.


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