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. OMNIFILTER BF7a Owner's Manual
    OMNIFILTER BF7a Owner's Manual
    OMNIFILTER BF7a Owner's Manual Learn More
    $0.00
  2. 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
  3. 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
  4. 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
  5. 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

    Learn More
    $5.99 Special Price $3.99 As low as $1.79
  6. OMNIFILTER CB6 ® Whole House Carbon Block Water Filter
    OMNIFILTER CB6 ® Whole House Carbon Block Water Filter
    OMNIFILTER CB6 ® Whole House Carbon Block Water Filter. 1 Micron. Flow Rate 5 gpm. Reduces Sediment & Rust Particles - Reduces Chlorine Taste & Odor - 97.59% - Removes Cysts - 99.99%. Fits Omnifilter BF7 Whole House model. Higher capacity for larger homes. Buy two and save even more. Learn More
    $89.99 Special Price $75.99 As low as $69.99
  7. OMNIFILTER OK7 ® Replacement O-Ring for BF7 & BF7a
    OMNIFILTER OK7 ® Replacement O-Ring for BF7 & BF7a
    OMNIFILTER OK7 ® Replacement O-Ring for BF7 & BF7a Learn More
    $12.99 Special Price $7.99 As low as $5.99
  8. OMNIFILTER RS15 Whole House 5 Micron Sediment Water Prefilter
    OMNIFILTER RS15 Whole House 5 Micron Sediment Prefilter
    OMNIFILTER RS15 Whole House 5 Micron Sediment Prefilter. Same as the Pentek ECP5-BB # 255490 Replaces #155184 CP5BB Big Blue Sediment Water Filter Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. Big Blue 5 Micron Pleated Cellulose-Polyester Sediment Water Filter. 10" long X 4 1/2" diameter. 8 per case, sold individually. Ametek #155184 Culligan CP-5BBS same as ECP5-BB (255490) and OMNIFILTER RS15. RS15 Series cartridges are manufactured from a special formulation of resin-impregnated cellulose and polyester fibers. This construction provides high flow rates and dirt-holding capacities, while maintaining extremely low pressure drops. The media is pleated around a polypropylene core for added strength and the ends are immersed in a thermo-setting vinyl plastisol. Embedding and sealing each end of the pleat block in this fashion fuses the components together forming a unitized end cap and gasket. Order a case and save even more. Learn More
    $24.99 Special Price $13.99 As low as $9.99
  9. OMNIFILTER RS6 ® Whole House 30 Micron Heavy-Duty Pleated Water Filter
    OMNIFILTER RS6 ® Whole House 30 Micron Heavy-Duty Pleated Water Filter
    OMNIFILTER RS6 ® Whole House 30 Micron Heavy-Duty Pleated Water Filter. Pleated paper construction. 30 Micron - Flow Rate 10 gpm. Filter capacity 30,000 gallons. Fits Omnifilter BF7 Whole House model. Buy two and save even more. Learn More
    $23.99 Special Price $13.99 As low as $11.99
  10. OMNIFILTER TO6 ® Whole House Heavy-Duty 1 Micron Replacement Water Filter
    OMNIFILTER TO6 ® Whole House Heavy-Duty 5 Micron Replacement Water Filter
    OMNIFILTER TO6 ® Whole House Heavy-Duty 5 Micron Replacement Water Filter. Higher capacity for larger homes. Pleated paper construction with carbon-wrapped inner core. Fits Omnifilter BF7 Whole House model. Flow Rate 5 gpm. Reduces Sediment & Rust Particles, Chlorine, Taste & Odor. Buy two and save even more. Learn More
    $32.99 Special Price $20.99 As low as $18.99
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.