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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  1. Standard Five Stage RO Reverse Osmosis Water Filter Change Kit-1000
    Five Stage Standard RO Water Filter Change Kit
    Five Stage Standard RO Water Filter Change Kit - One Year Filter Change Kit: (2) 5 Micron Poly Spun Sediment Pre Filters (9 7/8") (2) 10 Micron Extruded Carbon Pre Filter (9 3/4") (1) In-Line GAC Post Filter (Granular Activated Carbon 10") FREE CARBON BLOCK UPGRADE - Our 5 stage filter replacement kit has a second carbon block pre filter to replace the GAC hard shell pre filter that comes standard in most RO systems. The sediment prefilter needs changed twice as often as the carbon filters, so our kit includes an extra one. Membranes are sold separately. LIMITED TIME OFFER - Omnifilter prefilters and post filter for additional savings. The Omnifilter post filter is only available for post filters using 1/4" quick connections.
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    $54.99 Special Price $43.99 As low as $35.99
  2. Pentek GAC-10 # 155109 GAC10 Taste & Odor Replacement Water Filter Cartridge
    Pentek GAC-10 # 155109 GAC10 Taste & Odor Replacement Water Filter Cartridge

    Pentek GAC-10 # 155109 GAC10 Taste & Odor Replacement Water Filter Cartridge Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands Granular Activated Carbon Taste & Odor Water Filter. 9 3/4" long X 2 7/8" diameter. 12 per case, sold individually. Ametek # 155109 GAC Series cartridges effectively reduce unwanted tastes, odors and chlorine from your drinking water. They are designed to allow maximum contact between the water and carbon, ensuring maximum adsorption. 

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    $19.99 Special Price $11.99 As low as $9.99
  3. DESAL TFM-24 RO Reverse Osmosis Membrane #1220189 GE Osmonics Pentair - 1000
    Desal ® TFM-24 RO reverse osmosis membrane # 1220189 GE Osmonics Pentair

    THE DESAL TFM-24 HAS BEEN DISCONTINUED AND IS NO LONGER AVAILABLE. WE RECOMMEND REPLACING THE TFM-24 WITH THE MATCHING COMPATIBLE PENTAIR MEMBRANE - 655006-00.  

    Desal ® TFM-24 GE Osmonics - 24 GPD (gallons per day) TFC Style Reverse Osmosis RO Membrane - Fits Standard Size Membrane Housing. # 1220189. Pentair ® 24 GPD Thin Film Reverse Osmosis Membrane Model TLC-24 #655006-00  Replaces Desal Model # TFM-24 - Part # 1220189. Compatible with Dow Filmtec, WaterFiltersOnline.com and CSM RO Reverse Osmosis membranes. 

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    $89.99 Special Price $56.99 As low as $45.99
  4. 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
  5. Pro Products Sani System RO & Water Filtration System Sanitizer
    Pro Products Sani System RO & Water Filtration System Sanitizer
    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. Alos NSF certified. 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. Pro Products Sani System Sanitizer. 0.25 fl. oz. concentrate is perfect for your RO reverse osmosis drinking water system sanitizing..
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    $7.99 Special Price $4.99 As low as $2.99
  6. PREVIOUS VERSION: Automatic Shut-Off Valve for the Reverse Osmosis RO System-ASP ASV-1000
    Automatic Shut Off Valve for reverse osmosis system - ASO ASV
    Auto Shut Off RO 1 - Automatic shutoff valve for reverse osmosis systems. ASO ASV Easy to use 1/4" OD Tube Jaco connectors included. - The "in & out" markings are on the top of the valve. The top side of the valve is the high pressure side and the bottom side is the low pressure side. The high pressure from the filter housings goes to the "in" on the top of the valve. Then the high pressure "out" goes to the membrane housing "in". The membrane housing low pressure "out" connects to the "in" on the bottom side of the valve. The "out" on the bottom goes to the tank. The valve automatically shuts off production when the tank pressure reaches approximately 65% of the incoming line pressure.
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    $28.99 Special Price $19.99 As low as $15.99
  7. 4 Stage Reverse Osmosis RO Pure Water System - Free Shipping *
    4 Stage Reverse Osmosis RO Pure Water System - Free Shipping *
    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
  8. 5 Stage Reverse Osmosis RO Pure Water System - Free Shipping *
    5 Stage Reverse Osmosis RO Pure Water System - Free Shipping *
    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
  9. 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
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.