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JOHN GUEST 1/4″ One Way Check Valve RO Reverse Osmosis Water Filter NSF Certifie


JOHN GUEST 1/4


Produced at the request of leading companies in the Drinks Dispense industry, the Super Speedfit acetal Single Check Valve ensures protection against reversal of flow. The valves can be mounted in any position and an arrow molded into the body indicates direction of flow. They are designed for conenction to either plastic or soft metal tube and they are intended for liquids only. Note that they are not suitable for air and vacuum applications. The inner valve is spring loaded and the fitting produces low headloss. Valves with low fixed cracking pressure (i.e 10 cm water column), that have not been activated for some time may take several seconds to reseal It is the responsibility of the end user to verify that the product is suitable for his specific application. It is also recommended that the non-return valve is regularly checked and maintained. Pipe connection has never been easier than with John Guest fittings.

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What customers say about JOHN GUEST 1/4″ One Way Check Valve RO Reverse Osmosis Water Filter NSF Certifie?

  1. 2 of 2 people found the following review helpful
    5.0 out of 5 stars
    Great for adding a tank to a conventional (non-RO) filter, January 3, 2014
    By 
    Amazon Customer (East Lansing, MI United States) –

    Verified Purchase(What’s this?)
    This review is from: JOHN GUEST 1/4″ One Way Check Valve RO Reverse Osmosis Water Filter NSF Certifie (Kitchen)
    I bought this to add a pressure tank to a conventional (not reverse-osmosis) filter.

    We had a reverse osmosis filter system for years. It worked just fine, but the filters were a bit expensive to replace, so we went to a more simple 2-filter system. The water taste is just as good, but the problem was that the flow rate was very slow. Since we use the filter to drive the icemaker, it was making smaller ice and less often. So, I figured it might work to add the pressure tank from the reverse osmosis system to this system. But, to do that you need a check valve. Otherwise, water will flow backwards though the filters when the pressure drops, which would be very bad. So, I bought this check valve and added it to the filter input, then added the tank on the output with a T (also leftover from the RO system).

    It works great. I was concerned about how it would work with the 1/4″ line, since it is a press fitting, but it worked perfectly. I cut the existing line and slipped it into both side and have had no leaks at all. Now we have great pressure on our filtered water.

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  2. 1 of 1 people found the following review helpful
    5.0 out of 5 stars
    Great As Backup Backflow Protector For Espresso Machine Reservoir., January 9, 2015
    By 
    Netizen (California) –

    Verified Purchase(What’s this?)
    This review is from: JOHN GUEST 1/4″ One Way Check Valve RO Reverse Osmosis Water Filter NSF Certifie (Kitchen)
    Perfect. John Guest fittings are the bomb. Does anyone say that anymore? They are quite good, fit properly, and don’t leak. Used this as double insurance to backflow protect a setup with a float valve in an espresso machine reservoir. Bought another brand fitting and it leaked. Several Guest fittings I’ve used work perfectly without problem. I recommend them.

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  3. 1 of 1 people found the following review helpful
    5.0 out of 5 stars
    work well!, January 28, 2014
    By 
    L. Hou
    (REAL NAME)
      

    Verified Purchase(What’s this?)
    This review is from: JOHN GUEST 1/4″ One Way Check Valve RO Reverse Osmosis Water Filter NSF Certifie (Kitchen)
    my RO water TDS is 170 after changed a new membrane, which is impossible. After replaced the check valve with this new valve, the TDS is down to 50! It is really important to replace the check valve for your RO system!

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