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Thread: Air Manifold safety

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  1. #1

    Mar 2017
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    22 times
    All Types Of Treasure Hunting

    Air Manifold safety

    In 2010 I built an air manifold and water trap out of 2 inch aluminum pipe which is now at a remote location. I hesitate to use it due to corrosion, am unable to inspect the inside of it. I figure I'd break it before I get it apart. I can't get the pipe at my location but I can get schedule 80 plastic to construct a new one. should I be concerned about breathing through PVC pipe?

  2. #2
    Make America Great Again

    Apr 2013
    Oregon
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    not sure what you are trying to do, sounds like just a way to have dryer air
    Last edited by winners58; Jun 25, 2018 at 08:02 PM.
    " A pessimist is an optimist with experience "

  3. #3

    Mar 2017
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    22 times
    All Types Of Treasure Hunting
    Gast PCA-10 on the compressed air side. Had it rigged for two dive hoses, pressure tank on top and water trap at bottom to drain condensation from compressed air. I figured the two inch diameter might give me another breath past what the pressure tank would.

    I'm wondering about breathing fumes from the Polyvinyl Chloride itself and the glues and purple cleaners used in the gluing process. It seems like the fumes linger for quite a while after glueing and I dont know how the air under pressure would affect absorbing the plastic molecules and glues.
    Last edited by logjam; Jun 26, 2018 at 07:04 AM.
    russau likes this.

  4. #4
    Charter Member
    us
    Look at the Historical Gold Mining photo albums on my page

    Jan 2013
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    I wouldn't use plastic at all on my air system because that would be the first thing to break or crack. There's no need for it at all, but if you must put one in then use stainless.

  5. #5

    May 2005
    St. Louis, missouri
    5,740
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    And if you build one , make it so that you can open it up to clean it out ! MOLD will grow in it if you don't clean it out periodically! And while your at it , clean the inside of the air lines and mask! Your lungs will love you for it!! I personally use a stainless steel "kornie keg" (syrup container)that I can open up to clean!
    Clay Diggins and Goodyguy like this.

  6. #6

    Feb 2016
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    34 times
    All Types Of Treasure Hunting

    Air Manifold safety

    What are the plastic reserve tanks made of? HDPE?

  7. #7

    Mar 2017
    14
    22 times
    All Types Of Treasure Hunting
    Quote Originally Posted by Reed Lukens View Post
    I wouldn't use plastic at all on my air system because that would be the first thing to break or crack. There's no need for it at all, but if you must put one in then use stainless.
    I like the idea of not having a manifold.
    Shoot I like the idea of not having to dive...
    Running 24 hours a day with no divers is the only way i'm going to come out on the deal.

    How are you getting the water out of your air without a water trap?

  8. #8
    Charter Member
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    Look at the Historical Gold Mining photo albums on my page

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    You're already in the water, so you're going to get more water in naturally from the stream as you breathe. What little water comes from the compressor doesn't make it past the stainless reserve air tank. I use an old soda pop container that has a door on it and after a days diving there may be a tablespoon of water in it from the compressor. For the standard stainless tank, just tip it up and drain it when you shut down, not much comes out.
    russau and Goodyguy like this.

  9. #9
    Make America Great Again

    Apr 2013
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    saw one for sale that is the same as they sell in the Keene catalog. might also help take out moisture
    In-line air filter for Keene dredge - eBay
    Clay Diggins and russau like this.
    " A pessimist is an optimist with experience "

  10. #10

    Mar 2017
    14
    22 times
    All Types Of Treasure Hunting
    Gentlemen,
    Thanks for getting back with your thoughts. I'll give it a whirl without anythng except a stainless tank.
    Reed Lukens and russau like this.

  11. #11
    us
    Dec 2018
    Alaska
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    Quote Originally Posted by russau View Post
    And if you build one , make it so that you can open it up to clean it out ! MOLD will grow in it if you don't clean it out periodically! And while your at it , clean the inside of the air lines and mask! Your lungs will love you for it!! I personally use a stainless steel "kornie keg" (syrup container)that I can open up to clean!
    How do you have the in and out connections for the kornie keg setup?

  12. #12
    Charter Member
    us
    Mine President, XPBC

    Dec 2013
    Arcata, California
    Fisher 1212-x Fisher Gold Bug 2 Whites 4900/SP3 Rocker boxes, Keene sluices, Bazooka sluice, 2.5", 4" lowbankers, highbankers. Witch Sticks.
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    On my soda keg I drilled a hole in the lid and installed a bulk head fitting and a T fitting.

  13. #13

    May 2005
    St. Louis, missouri
    5,740
    4304 times
    Use the fittings for the Corny keg that are used on it. Be sure to take the inner tube out of the tank on both sides to ensure you get enough air. I got 2 of these tanks from a friend from Indy that worked for a soda company . He got them for free .They had at least 1000 tanks and were looking to get rid of them in favor of their new container. All gone now and I ended up hanging it up also due to my health!
    winners58 likes this.

  14. #14
    us
    Brian

    Mar 2014
    Central Oregon Coast
    Whites GMT Garret fully underwater
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    Interesting discussion. PVC Water pipes are common and in major underground systems the green pvc is most common. I never heard of any adverse issues using pvc for air intakes. Keene has a pvc dredge air comp intake pipe to avoid exhaust fumes. The purple primer and glue is not a worry in fresh water systems for human consumption. The nice thing about the plastics is it does not corrode. I have two air reserve tanks for my dredges and one is aluminum and the other is a pvc type plastic.


    Bejay
    akflyer and logjam like this.

 

 

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