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American Water FiltrationServing the USA & World Since 1999

Under Counter Reverse Osmosis Systems

Under Counter Reverse Osmosis Pure Drinking Water Systems

  1. 4 Stage Reverse Osmosis RO Pure Drinking Water System
    4 Stage Reverse Osmosis RO Pure Drinking Water System

    4 Stage Reverse Osmosis RO Pure Water System With Auto Shut Off Valve

    50 Gallon Per Day Filmtec TFC Reverse Osmosis Membrane (Higher capacity and faster recovery time) 50 GPD FILMTEC TFC Reverse Osmosis Membrane, KX Carbon Block & Osmonics Sediment Pre Filter, Omnipure GAC Post Filter. Uses Standard Size Replacement Filters. Includes New 4 Gallon Storage Tank (14 " high X 11 " diameter) , Long Reach CA Lead Safe Faucet & Installation Kit. System measures: 17" High X 14" Wide X 6" Deep

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    $279.99 Special Price $210.00 As low as $185.00
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  2. GGN-SSRO-215
    Stainless Steel Tankless Reverse Osmosis Drinking Water RO System

    Use in Place of the GE Merlin Tankless RO Reverse Osmosis System. This Commercial Grade Construction Using Food Grade Stainless Steel is designed for commercial and/or Residential Use. Its Tankless Operation or Stainless Steel 4.4 Gallon Tank for Highest Flow Rates and High Demand usage with a 400 GPD Gallons Per Day High Production Capacity.  Filters and membranes are pre-installed so it is ready for use as soon as you get it.

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    $599.95 Special Price $399.95
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  3. 5 Stage Reverse Osmosis RO Pure Drinking Water System
    5 Stage Reverse Osmosis RO Pure Drinking Water System
    5 Stage Reverse Osmosis RO Pure Water System With Auto Shut Off Valve - 50 Gallon Per Day Filmtec TFC Reverse Osmosis Membrane (Higher capacity and faster recovery time) 50 GPD FILMTEC TFC Reverse Osmosis Membrane, KX Carbon Block & Osmonics Sediment Pre Filter, Omnipure GAC Post Filter. Uses Standard Size Replacement Filters Includes New 4 Gallon Storage Tank (14" high X 11"diameter) , Long Reach CA Lead Safe Faucet & Installation Kit. System measures: 17" High X 17" Wide X 6" Deep
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    $319.99 Special Price $229.99 As low as $195.99
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  4. 5 Stage With Pump Reverse Osmosis RO Pure Drinking Water System
    5 Stage With Pump Reverse Osmosis RO Pure Drinking Water System
    5 Stage Reverse Osmosis RO Pure Water System With Auto Shut Off Valve - 50 Gallon Per Day Filmtec TFC Reverse Osmosis Membrane (Higher capacity and faster recovery time) 50 GPD FILMTEC TFC Reverse Osmosis Membrane, KX Carbon Block & Osmonics Sediment Pre Filter, Omnipure GAC Post Filter. Uses Standard Size Replacement Filters Includes New 4 Gallon Storage Tank (14" high X 11"diameter) , Long Reach CA Lead Safe Faucet & Installation Kit. System measures: 17" High X 17" Wide X 6" Deep
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    $399.99 Special Price $339.99 As low as $299.99
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  5. Aqua Flo RO75 Reverse Osmosis System #20010073
    Aqua Flo RO75 Reverse Osmosis System #20010073
    Aqua Flo RO75 Reverse Osmosis System. 5 stage RO reverse osmosis system. Comes with tank, faucet, tubes, filters and membrane. Everything for a normal installation. Uses standard style and size replacement filters.
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    $249.99 Special Price $189.99 As low as $169.99
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  6. Aqua Flo RO75BP Reverse Osmosis System - 5 Stage With Booster Pump #20010074
    Aqua Flo RO75BP Reverse Osmosis System - 5 Stage With Booster Pump #20010074
    Aqua Flo RO75BP Reverse Osmosis System. 5 stage RO reverse osmosis system. Comes with tank, faucet, tubes, filters and membrane. Everything for a normal installation. Uses standard style and size replacement filters.
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    $379.99 Special Price $299.00 As low as $275.00
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  7. Pentek RO-2550 RO 50 GPD Reverse Osmosis System
    Pentek RO-2550 RO 50 GPD 4 Stage Reverse Osmosis RO System
    Pentek RO-2550 4 Stage Reverse Osmosis Pure Water System With Auto Shut Off Valve - 50 Gallon Per Day TFC Reverse Osmosis Membrane (Higher capacity and faster recovery time). Tested and Certified by NSF International against NSF/ANSI Standard 58 for the reduction of Total Dissolved Solids, Fluoride, Turbidity, Lead, Selenium, and Copper. Uses Standard Size Replacement Filters. Includes New 3.2 Gallon Storage Tank (14" high X 9 1/2" diameter) , Long Reach Air Gap Faucet & Installation Kit. System measures: 14" High X 15 1/2" Wide X 5 1/4" Deep
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    $269.99 Special Price $189.99
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  8. Hydrotech ® 4VTFC75G Reverse Osmosis System RO # 12302003
    Hydrotech (Aqua Flo) ® 4VTFC75G Reverse Osmosis System RO #1240203
    Hydrotech (Aqua Flo) ® 4VTFC75G Reverse Osmosis Drinking Water System RO. 75 Gallon Per Day GPD. TFC Thin Film Composite membrane, sediment pre filter, carbon pre filter, carbon post filter, auto shut off valve, California Prop. 65 lead safe 3/8" flow air gap faucet, and your choice of metal or polypropylene tank. System is 15" wide X 15" high X 3" deep. Plastic tank is 20" high X 8" diameter. Metal tank is 15" high X 11" diameter. # 12302003.
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    $399.99 Special Price $299.99 As low as $279.99
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  9. 3M RO301 3 Stage Reverse Osmosis System
    3M RO301 3 Stage Reverse Osmosis System

    3MRO301 Reverse Osmosis System #04-04506 This Reverse Osmosis (RO) system with advanced three stage filtration process includes a Sediment/Carbon Pre Filter, a Carbon Block Filtration Post Filter, and a Reverse Osmosis. Included in the package: RO system with 3 filter cartridges, faucet, tank, tubing, fittings, installation manual and performance data sheet

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    $669.95 Special Price $479.99 As low as $449.00
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  10. OMNIFILTER RO2050 Reverse Osmosis System
    OMNIFILTER RO2050 Reverse Osmosis System

    OMNIFILTER RO2050 ® Reverse Osmosis System

    • Deluxe 4-stage reverse osmosis water filter
    • Ultimate water filtration - bottle water quality
    • Use for chlorinated and non-chlorinated water
    • Reduces sediment & rust particles, chlorine taste & odor plus chemicals, cysts, lead & TDS
    • Includes 5-micron prefilter, membrane, carbon filter, GAC post filter, 3-gal. pressure tank, air gap faucet, installation hardware & wrench
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    $249.99 Special Price $189.95
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  11. 3MRO401 4 Stage Reverse Osmosis System
    3MRO401 4 Stage Reverse Osmosis System
    The 3MRO401 replaces the SQC4 to help provide cleaner, better tasting water through reverse osmosis The 3M reverse osmosis filtration system helps provide cleaner, better tasting water through reverse osmosis filtration. It offers multi-stage filtration, incorporating separate sediment and chlorine taste; odor filters for excellent membrane module protection, a sanitary, encapsulated reverse osmosis membrane and carbon block post-filter for superior flow from a dedicated faucet.
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    $983.46 Special Price $569.95 As low as $499.00
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  12. PuroTwist ® 4000 Reverse Osmosis RO System
    PuroTwist ® 4000 Reverse Osmosis RO System
    PuroTwist ® 4000 Reverse Osmosis System - 4 Stage RO Reverse Osmosis Pure Water Drinking System. 50 Gallon Per Day TFC Reverse Osmosis Membrane (Valve in head for easy filter changes) 50 GPD TFC Reverse Osmosis Membrane, Uses Easy Change Replacement Filters. Includes Storage Tank, Long Reach California Prop. 65 lead safe faucet, Filters & Installation Kit.. Simple system to maintain. PT4000-T50-SSNA. Dimensions: Filter and Head 19" high, 12" wide, 4 1/2" deep. Tank 14" high, 10" diameter.
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    $379.99 Special Price $299.99 As low as $279.99
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  13. 3M RO501 Reverse Osmosis System With Pump
    3M RO501 Reverse Osmosis System With Pump
    3M RO 501 Reverse Osmosis System Our 3MRO501 systems install under the kitchen sink and deliver cleaner, clearer, better tasting drinking water through a dedicated drinking water faucet. These systems provide water filtration on demand for drinking water, coffee, tea, baby formula, etc. and for cooking purposes as well. Our universal system design allows for use on both chlorinated (municipal) and non-chlorinated (well water) systems.
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    $2,265.14 Special Price $1,099.00 As low as $1,059.00
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  14. AquaPure ® AP-RO5500 Reverse Osmosis RO System by 3M Purification - DISCONTINUED - WE STILL HAVE REPLACEMENT FILTERS, RO MEMBRANES AND PARTS FOR THIS SYSTEM.
    AquaPure ® AP-RO5500 Reverse Osmosis RO System by 3M Purification - DISCONTINUED - WE STILL HAVE REPLACEMENT FILTERS, RO MEMBRANES AND PARTS FOR THIS SYSTEM.
    DISCONTINUED - WE STILL HAVE REPLACEMENT FILTERS, RO MEMBRANES AND PARTS FOR THIS SYSTEM. AquaPure ® AP-RO5500 Reverse Osmosis System by 3M Purification # 55982-01. Undersink Reverse Osmosis System. 12 - 18 GPD TFC RO membrane, automatic shut-off valve. Compact design. Includes faucet and AP5527 water filter cartridges. - aka Aqua-Pure or Aqua Pure.
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    $299.99 Special Price $199.99
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  15. Water Factory ® SQC-3 HF RO Reverse Osmosis Drinking Water System 04-045 by 3M Purification
    Water Factory ® SQC-3 HF RO Reverse Osmosis Drinking Water System 04-045 by 3M Purification
    Water Factory ® SQC-3 HF RO Reverse Osmosis Drinking Water System 04-045 by 3M Purification. The Water Factory System SQC 3 HF under the counter reverse osmosis unit is a three (3) stage RO system designed for use on either chlorinated or no chlorine water supplies. The sanitary quick change cartridges enable easy water filters change with no mess. The SQC 3 HF Model can produce up to 20 gallons of pure drinking water a day and can be installed to feed an icemaker within your refrigerator. The minimum water pressure requirement of the SQC 3 HF Models is 50 psi. Uses (#1) 47-55706G2 Sediment / Carbon Prefilter, (#2) 66-4706G2 TFC HF Reverse Osmosis Membrane and (#3) 47-55710G2 Block Carbon Postfilter. Includes water storage accumulator tank, faucet and installation kit.
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    $559.99 Special Price $469.99 As low as $439.99
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  16. Water Factory ® SQC-4 HF Reverse Osmosis Drinking Water System 04-063 RO by 3M Purification
    Water Factory ® SQC-4 HF Reverse Osmosis Drinking Water System 04-063 RO by 3M Purification
    Water Factory ® SQC-4 HF Reverse Osmosis Drinking Water System 04-063 RO by 3M Purification. The Water Factory System SQC 4 HF under counter RO reverse osmosis unit is a 4 stage RO system designed for use on either heavily chlorinated or non chlorine water supplies that is severely affecting the taste and odor of the tap water. The sanitary quick change water filter cartridges are easy to change with no mess. The SQC 4 HF Model can produce up to 20 gallons of pure drinking water a day and can be installed to feed an ice maker within your refrigerator. The minimum water pressure requirement of the SQC HF Models is 50 psi. Uses (#1) 47-55702G2 Sediment Prefilter, (#2) 47-55704G2 Granular Carbon Prefilter, (#3) 66-4706G2 TFC HF Reverse Osmosis Membrane and (#4) 47-55710G2 Block Carbon Postfilter. Invludes tank, faucet and installation kit.
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    $599.99 Special Price $499.99 As low as $479.99
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  17. Everpure ® ROM II DWS Reverse Osmosis System # 9273-75K
    Everpure ® ROM II DWS Reverse Osmosis System # 9273-75K
    Everpure ® ROM II DWS Reverse Osmosis System # 9273-75K Same as ROM III except does not contain VOC "C" cartridge • Commercial-quality Reverse Osmosis drinking water system for your home. • Reduces TDS. • Capacity: 500 gal • Flow Rate: 14.4 gal/day • Certifications: NSF 58. Includes tank, faucet and installation kit.
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    $699.99 Special Price $524.99 As low as $484.99
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  18. Everpure ® ROM III Reverse Osmosis System # 9273-76K
    Everpure ® ROM III Reverse Osmosis System # 9273-76K
    Everpure ® ROM III Reverse Osmosis System # 9273-76K • Commercial-quality Reverse Osmosis drinking water system for your home. • Reduces TDS. • Capacity: 500 gal • Flow Rate: 14.4 gal/day • Certifications: NSF 58. Includes tank, faucet and installation kit.
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    $799.99 Special Price $599.99 As low as $559.99
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  19. GE-MERLIN Reverse Osmosis Tankless RO System-DISCONTINUED-NO LONGER AVAILABLE-STILL HAVE REPLACEMENT FILTERS, RO MEMBRANES, AND PARTS - #1238342-175
    GE ® Merlin Reverse Osmosis Tankless RO System #1255052 - DISCONTINUED - NO LONGER AVAILABLE - WE STILL HAVE REPLACEMENT FILTERS, RO MEMBRANES AND PARTS
    THE GE MERLIN SYSTEM IS DISCONTINUED AND NO LONGER AVAILABLE - BUT WE STILL HAVE REPLACEMENT FILTERS, RO MEMBRANES AND PARTS - 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. 17.05" wide x 20.34" tall x 9.68" deep.
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    $599.99
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  20. Pentair GRO-475B Reverse Osmosis System
    Pentair GRO-475B Reverse Osmosis System
    Pentair GRO-475B 4 Stage RO System 161111
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    $399.99
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  21. Countertop 50 GPD RO Reverse Osmosis Drinking Water Purification System
    Countertop 50 GPD RO Reverse Osmosis Drinking Water Purification System

    Countertop 50 GPD RO Reverse Osmosis Water Purification System. Easy To Install. Countertop design. 50 GPD high capacity, fast recovery system. Attaches to existing kitchen faucets. No need to alter the plumbing. Great for apartment dwellers. Portable, take it from one faucet to another.  This countertop system uses top quality, easy to find replacement water filters and RO membrane. Easy to replace filters with Quick Connectors. 14 3/" Tall x 10 3/4" Wide x 10" Deep (plus 2 1/2" spigot) Our favorite countertop system. UPC 850003338132

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    $199.95 Special Price $99.95 As low as $89.00
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  22. Pentair GRO-75EN 75 GPD 4 Stage Reverse Osmosis System
    Pentair GRO-75EN 75 GPD 4 Stage Reverse Osmosis System

    Pentair GRO-75EN 75 GPD 4 Stage RO Reverse Osmosis System

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    $329.99 Special Price $269.95 As low as $255.00
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Installation and Trouble Shooting Guide
Installation and Trouble ...

Water Filter System and Reverse Osmosis System Installation and Service Guide. Huge inventory of replacement water filters , reverse osmosis membranes and maintenance service parts. Low prices and fast shipping online since 1999. Millions sold.

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Parts Department
Parts Department

Water Filter System Parts Department. Find replacement filters, reverse osmosis membranes and repair parts for all major brands. Huge selection. Low prices and fast shipping online since 1999. Millions sold.

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RO Water Tanks
RO Water Tanks

Reverse Osmosis Replacement RO Water Accumulator Tanks. Large and small water storage tanks made of SS Stainless Steel, plastic and standard steel. All connecting supplies such as valves, Tees, poly tubing, booster pumps and faucets. Large selection, low prices and fast shipping since 1999.

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Faucets
Faucets

Replacement Faucets for RO Reverse Osmosis and Pure Drinking Water Filter Systems. Large selection. Low prices and fast shipping online since 1999. Millions sold.

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

SEE OUR ONLINE HELP GUIDE

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