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Thread: Solar Flat Plate draindown system

  1. #1
    Rancher
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    Default Solar Flat Plate draindown system

    What's that thingie at the highest point on a flat plate solar hot water system, that lets the air/steam out but closes when the water hits it.

    Is it the same as a watts air vent that's used on an air scoop?

    Rancher

  2. #2
    Computer Programmer Bill Arden's Avatar
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    Sep 2006
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    MN, USA
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    Default

    Spyrovent?
    Important note Ė I donít know man made laws, just laws of physics
    Disclaimer: I'm a big fan of Darwin awards.

  3. #3

    Default

    rancher,
    in a word YES. Its not the same thing as a spirovent however. Its just a vent with a float.

    Lou

  4. #4
    Rancher
    Guest

    Default

    BigLou,

    Thanks, do you have a source?

    I'm putting mine back on the roof after a 80 mph windstorm, just used a check valve before, thought I'd do it right.

    Rancher

  5. #5

    Default

    Rancher,
    here is a link of what you want. I get all my stuff at the local supply house, make sure that any air on both the supply and return lines can get out

    http://www.taco-hvac.com/en/products...nt_category=87

    Lou

  6. #6
    Rancher
    Guest

    Default

    Thanks,

    The Hy-vent is exactly what I have avaiable to use except it is the Watts brand.

    But I don't know how it operates, I understand there is a float inside that closes it off when the air is fully purged, and it kinda makes sense that it re-opens when the water drops.

    I want this for freeze protection, i.e. drain down at night.

    Rancher

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