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  1. #1
    Senior Member pwall's Avatar
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    RO/DI mixing valve

    Connected a water mixing valve to help control the temperature of the water entering the RO/DI unit.
    Temperature of the water is now approximately 78F, instead of 50-60F and the results were impressive.
    It took 80 minutes to fill a 5gallon container, that's 16minutes per gallon...very close to 4gallons per hour!
    The input water TDS reading went from 50 to 80, I'm assuming that the hot water is 'dirtier' than just the cold, but the output is still 0.

    Here are 2 pictures of the mixing valve (thanks cres to getting this for me)....
    http://us.f2.yahoofs.com/bc/42479ef7...cO6RCBSS8kDYZk
    http://us.f2.yahoofs.com/bc/42479ef7...cO6RCB6tVCZz4e
    Regards,
    Patrick.
    Ottawa (Orleans), Ontario
    Yahoo IM: pwallnfld

  2. #2
    Senior Member pwall's Avatar
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    ok, tried to link in the pictures...that didn't work.
    Here they are....
    Regards,
    Patrick.
    Ottawa (Orleans), Ontario
    Yahoo IM: pwallnfld

  3. #3
    Senior Member pwall's Avatar
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    And the last....
    Regards,
    Patrick.
    Ottawa (Orleans), Ontario
    Yahoo IM: pwallnfld

  4. #4
    Senior Member Pickoff's Avatar
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    I thought I read something about the membrane being sensitive to warmer water. I really like what you've done. I am a little concerned with shortening the lifespan of the RO/DI.

    How does your new output comapre to the cold water setup?

  5. #5
    Senior Member tang_man_montreal's Avatar
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    Pickoff,
    What Pwall has done is increase the efficiency of his RO/DI unit to regulate the water to the manufacturer's recommended water temperature at 78 degrees.
    You are right that HOT water is bad for the membrane. But this is not HOT water.
    I am Homer of BORG... Prepare to be..OOOO!! DONUT!!!!!!

  6. #6
    Senior Member tang_man_montreal's Avatar
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    pwall,
    Did you get the part at McMaster?
    Can you point us to where you got it and how much it was?
    I am Homer of BORG... Prepare to be..OOOO!! DONUT!!!!!!

  7. #7
    Senior Member pwall's Avatar
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    Hi.

    The valve was ordered from McMaster. Just speaking with cres, he'll post the part number.
    The hoses etc were purchased from Home Depot.
    Regards,
    Patrick.
    Ottawa (Orleans), Ontario
    Yahoo IM: pwallnfld

  8. #8
    Senior Member pwall's Avatar
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    The output of the RO/DI unit was about 2 gallons per hour.
    I was amazed at this difference.
    Regards,
    Patrick.
    Ottawa (Orleans), Ontario
    Yahoo IM: pwallnfld

  9. #9
    Moderator cres's Avatar
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    Yes McMaster Carr for the mixer
    Part 9158K11 -- US$35.25 and shipping from Toronto (not much, but, I'm not sure, haven't seen a statement).

    NOTE: This is a mixer, not a temperature control unit. You have to run water and test the temp until you get what you want.
    Sarchasm: The gulf between the author of sarcastic wit and the person who doesn't get it.

  10. #10
    Senior Member pwall's Avatar
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    The other nice improvement is I no longer gets tons of condensation on the lines of the RO unit as the water isn't so cold.
    Regards,
    Patrick.
    Ottawa (Orleans), Ontario
    Yahoo IM: pwallnfld

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