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Flow Restrictors

Flow Restrictors

Flow Restrictors For Reverse Osmosis Pure Water Systems

  1. Regular Price: $33.99

    Special Price $19.99

    As low as: $14.99
    150 ml Premium inline reverse osmosis membrane flow restrictor - Our in-line capillary flow restrictors are simple to install. Simply push the 1/4" poly tube firmly into the quick connectors and you are done. Be sure that you order the flow restrictor size to match your reverse osmosis membrane size. Arrow on side points toward the drain. Very simple to install. Learn More
  2. $19.99
    Flow Restrictor - capillary - 250 ml 1/4' quick connect fittings. "Arrow points to drain". Learn More
  3. $19.99
    Flow Restrictor - capillary - 350 ml 1/4' quick connect fittings. "Arrow points to drain". Learn More
  4. $19.99
    Flow Restrictor - capillary - 500 ml 1/4' quick connect fittings. "Arrow points to drain". Learn More
  5. $19.99
    Flow Restrictor - capillary - 750 ml 1/4' quick connect fittings. "Arrow points to drain". Learn More
  6. $19.99
    Flow Restrictor - capillary - 1000 ml 1/4' quick connect fittings. "Arrow points to drain". Learn More
  7. $19.99
    Flow Restrictor - capillary - 1200 ml 1/4' quick connect fittings. "Arrow points to drain". Learn More
  8. $19.99
    Flow Restrictor - Stainless steel insert - 350 ml fixed elbow fitting John Guest 1/8" MNPT X 1/4" tube Learn More
  9. Regular Price: $19.99

    Special Price $18.99

    Flow Restrictor - capillary - 150 ml 1/4' female threaded connections. "Arrow points to drain". Learn More
  10. $19.99
    Hydrotech 75G Flow Restrictor Tube #40600042 Learn More
  11. Regular Price: $36.99

    Special Price $19.99

    As low as: $12.63
    Stainless Steel Insert Flow Restrictor - Custom made from 303 SS Stainless Steel. This is the finest insert flow restrictor availble from anyone, anywhere. Includes heavy duty 303 SS sediment pre-screen to prevent debris from lodging in the flow chamber. If you like insert flow restrictors, you will love this one. Learn More
  12. 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
  13. 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

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.