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.

LOW PRICES and FAST SHIPPING SINCE 1999 !

99.5% Of All Items In Stock For Same Day Shipping!

DuPure Pure Blue 3 Stage RO Reverse Osmosis System

DuPure Pure Blue 3 Stage RO Reverse Osmosis System

DuPure Pure Blue 3 Stage RO Reverse Osmosis System

Simply replace your Dupure or Raine Pure Blue -60 filter heads and start using the standard threaded Omnipure "Q" series replacement water filter cartridges at a lower cost than the -60 threaded filter cartridges. 

Only the filter heads will need replaced.  Choose either the valved or non-valved heads.  The valved head will turn off the water to each filter as the cartridge is removed.  If you wish an even easier way to upgrade order the full replacement system below which has the standad threaded Omnipure "Q" series heads and replacement filters included.  Simply disconnect the inlet and outlet tubes from the old system and connect them to the new system.  Done!

Since both systems use John Guest ® quick connectors it is very easy to install the replacement standard threaded head or replacement system. Keep your old DuPure or Raine faucet and feed valve.  See information on how easy it is to use John Guest quick connectors.

Choose any of the 3 RO Reverse Osmosis Membranes listed below based on your preference.  15, 36 or 50 GPD (gallons per day)

Once you convert to the standard "Q" series head you will be able to start sanitizing your RO system using the sanitizing cartridge listed below.  You will need 3 to fully sanitize your system.  They are reusable indefinately.

  1. Omnipure Water Filter Head Replacement #NVH1/4 (#VH1/4)
    Omnipure Water Filter Head Replacement #NVH1/4 (#VH1/4)
    Omnipure Water Filter Head Replacement. Non Valve and Valve In Head. 1/4" FNPT ports for easy installation of fittings. #NVH1/4 (#VH1/4) Add Bracket #Q-BRACKET for best installation. Learn More
    $24.99 Special Price $11.99 As low as $10.39
  2. Omnipure Q5621- Carbon Replacement Pre-filter and Post-Water Filter- 1000
    Omnipure ® Q5621 Carbon Pre/Post Water Filter
    Omnipure ® Q5621 Carbon Block Pre/Post Water Filter. 10 Micron. Upgrade To Carbon Block From Standard GAC Carbon. No "Carbon Fines" Released. Learn More
    $36.99 Special Price $25.99 As low as $21.99
  3. Omnipure Q5633- Carbon Replacement Prefilter and Post Water Filter-1000
    Omnipure ® Q5633 Carbon Pre/Post Water Filter
    Omnipure ® Q5633 Carbon Replacement Prefilter and Post Water Filter. "Q" Series Quick Connect Sanitary Change. Granular Activated Carbon - T33 GAC Filtration. Learn More
    $27.99 Special Price $18.99 As low as $14.99
  4. Omnipure Q5640 - T40 Coconut GAC Replacement Water Filter- 1000
    Omnipure Q5640 T40 Coconut GAC Replacement Water Filter
    Omnipure Q5640 T40 Coconut Shell GAC Replacement Premium Water Filter - 12" x 2.5". Q Series Quick Change Sanitary Connection. Learn More
    $32.99 Special Price $20.99 As low as $16.99
  5. Omnipure ® TQ56-50FC 50 GPD TFC RO Reverse Osmosis Membrane With Built-In Flow Control
    Omnipure ® TQ56-50FC 50 GPD TFC RO Reverse Osmosis Membrane With Built-In Flow Control
    Omnipure ® TQ56-50FC 50 GPD TFC RO Reverse Osmosis Membrane With Built-In Flow Control. Omnipure Q Series Sanitary Quick Change Replacement RO Reverse Osmosis Membrane. Learn More
    $125.00 Special Price $89.99 As low as $77.99
  6. Omnipure ® TQ56-36FC 36 GPD TFC RO Reverse Osmosis Membrane With Built-In Flow Control
    Omnipure ® TQ56-36FC 36 GPD TFC RO Reverse Osmosis Membrane With Built-In Flow Control
    Omnipure ® TQ56-36FC 36 GPD TFC RO Reverse Osmosis Membrane With Built-In Flow Control. Omnipure Q Series Sanitary Quick Change Replacement RO Reverse Osmosis Membrane. Learn More
    $115.00 Special Price $84.99 As low as $73.99
  7. Omnipure ® TQ56-15FC 15 GPD TFC RO Reverse Osmosis Membrane With Built-In Flow Control
    Omnipure ® TQ56-15FC 15 GPD TFC RO Reverse Osmosis Membrane With Built-In Flow Control
    Omnipure ® TQ56-15FC 15 GPD TFC RO Reverse Osmosis Membrane With Built-In Flow Control. Omnipure Q Series Sanitary Quick Change Replacement RO Reverse Osmosis Membrane. Learn More
    $89.99 Special Price $69.99 As low as $58.99
  8. Air Pressure Gauge for Reverse Osmosis Water Accumulator Tanks -1000
    Air pressure gauge for reverse osmosis water accumulator tanks
    Air pressure gauge for reverse osmosis water accumulator tanks - Specially calibrated for reverse osmosis system tanks. Scale from 1 to 20 PSI. Large scale reading over small PSI range allows optimum accuracy. Just like car tires lose air pressure, so does the bladder of your reverse osmosis water accumulator tank. Improper tank air pressure will cause your system to operate improperly. This is a must for all reverse osmosis system owners. Learn More
    $24.99 Special Price $17.99 As low as $12.99
  9. 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
  10. 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
  11. PuroTwist 3 Stage 50 GPD RO Reverse Osmosis TFC Membrane Quick Change Water Filtration Retro Fit System
    PuroTwist 3 Stage 50 GPD RO Reverse Osmosis TFC Membrane Quick Change Water Filtration Retro Fit System
    PuROTwist 3 Stage 50 GPD RO Reverse Osmosis TFC Membrane Quick Change Water Filtration Retro Fit System. PT3000T50-SS-RK Quick change head with 50 GPD membrane, Q5621 carbon block prefilter and Q5633 GAC post filter. No tank, faucet or installation kit. Uses John Guest quick connectors that are very easy to install. Works in place of the ® DuPure or ® Rayne "-60" Pure Blue - ® Omnipure -60 "Q" Series systems shown in the photo. Learn More
    $249.99 Special Price $179.99 As low as $144.99
  12. Omnipure Q Series Q53XE Sanitizing Housing
    Omnipure Q Series Q53XE Sanitizing Housing

    Omnipure Q Series Q53XE Sanitizing Housing.  6" empty Q Series quick change filter cartridge used for sanitizing Omnipure, PuroTwist and converted DuPure reverse osmosis and under counter drinking water filtration systems.

    Learn More
    $9.95
  13. 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
  14. 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
  15. Chiller Daddy CHL-750XL Under Sink Water Chiller
    Chiller Daddy CHL-750XL Under Sink Water Chiller

    Chiller Daddy ® CHL-750XL Under Sink Water Chiller -  NEW TANK IS 25% LARGER than our previous chillers.  Output Cold Tank Volume : 3 liter (0.8 gallon) Exterior cabinet is made of RUST FREE 304 SS Stainless Steel. Cold Water Container is made of SUS304 Stainless Steel. Inlets and outlets are 1/4" stainless steel 304. Includes a pair of quick connectors for a simple hook up. Output of Cold Water : 1.34 Gallons Per Hour (5 Liters 5L/H (<10C) Continuous Cold Water Output(cc/hr) 5,400. This is a high output, heavy duty undersink drinking water chiller. Great for use with a Reverse Osmosis System or drinking water filter system.

    Learn More
    $499.99 Special Price $349.99 As low as $310.99
  16. Inline Water Shut Off Valve-1000
    Inline Water Shut Off Valve - Great For Refrigerators And Ice Machines
    Inline Water Shut Off Valve With 1/4" or 3/8" Quick Connect Fittings - Very easy to install and use. - Great for refrigerators, UV systems, chillers, hot pots, coffee machines, ice machines etc. Learn More
    $14.99 Special Price $9.99 As low as $6.99
Easy TDS Membrane Performance 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 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


Be sure to check our Parts Department for important parts for your DuPure Reverse Osmosis System such as TDS Testers For Reverse Osmosis Membranes, Replacement Tanks, O-ringsFaucets, Pumps, Fittings, UV Systems and more parts for your reverse osmosis pure water filter system.   View maintenance and servicing tips for DuPure International water filter system online at our Installation & Trouble Shooting Guide.

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