Question about adding extension to 2 1/2" Combo Hibanker/Dredge
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Thread: Question about adding extension to 2 1/2" Combo Hibanker/Dredge

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  1. #1
    us
    Gold & Gem Prospector

    Nov 2012
    Western North Carolina
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    Question about adding extension to 2 1/2" Combo Hibanker/Dredge

    Recent winter floods rearranged some of the stream on my property as to gravel bars, depths etc. I've saw an area between two large rocks exposed that hadn't seen before because it is deeper and it looks like a natural place to catch any gold. The problem is that it's deeper than I can long arm and I don't have air so thought I would ask if anyone had ever tried adding a piece of pvc to the end of nozzle to reach deeper. I would probably need at least 2-3 feet additional and what are your thoughts and/or other suggestions.
    danec71 likes this.

  2. #2
    us
    Hardrock prospector

    May 2017
    Middle Oregon
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    The flow rate of water will go way down. Still may be worth doing in the area you describe.

  3. #3

    Feb 2014
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    I have seen several guys use PVC to get under boulders they couldn't move. The longest I have seen is 4'but that was on nozzles larger than yours. OVC is cheap, worth the try.
    Never confuse motion with progress


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  4. #4

    Aug 2015
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    I'm thinking get wet. Snorkel with extended breather, or maybe a snorkel with a two way mouth piece like for scuba.

    I'll be in the same situation later this summer...

  5. #5
    us
    Aug 2004
    Olympia WA
    Minelab Xterra 70, Minelab SD 2200d, 2.5", 3", 4"and several Keene 5" production dredges, Knelson Centrifuge, Gold screw automatic panner
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    Quote Originally Posted by mikep691 View Post
    I'm thinking get wet. Snorkel with extended breather, or maybe a snorkel with a two way mouth piece like for scuba.

    I'll be in the same situation later this summer...
    Your idea will work just fine.
    By adding an extension to your suction nozzle you are effectively converting it into a power jet. Your flow rates should be relatively unchanged except it takes more HP to pull material from a greater depth but the increase in depth you are making is minimal. Your biggest problem will be because you can no longer prevent oversize rocks from entering by using your hands and you will see a lot of plug-ups and bigger rocks stuck to the end of the nozzle.

    Mike601 actually has the best solution. You need to put your resources into being able to breathe underwater so you can be down there where the work is
    russau and danec71 like this.

  6. #6
    us
    Aug 2004
    Olympia WA
    Minelab Xterra 70, Minelab SD 2200d, 2.5", 3", 4"and several Keene 5" production dredges, Knelson Centrifuge, Gold screw automatic panner
    858
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    Quote Originally Posted by Assembler View Post
    The flow rate of water will go way down. Still may be worth doing in the area you describe.
    This is wrong, sorry
    ratled likes this.

  7. #7

    Feb 2014
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    There is a reason you can't buy longer snorkels........
    Never confuse motion with progress


    Illegitimi non carborundum

    __________________
    ███ ████ everything ████ ███ ███████ ██ is ███████ fine █████.
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  8. #8

    Aug 2015
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    All Types Of Treasure Hunting
    Quote Originally Posted by ratled View Post
    There is a reason you can't buy longer snorkels........
    We know you can't breathe in and out through the same tube at depth, but with a scuba type mouth piece, you're only breathing in from the tube, and exhaling into the water. It's not at 20 feet, only a few feet.

  9. #9
    us
    Hardrock prospector

    May 2017
    Middle Oregon
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    Quote Originally Posted by mikep691 View Post
    We know you can't breathe in and out through the same tube at depth, but with a scuba type mouth piece, you're only breathing in from the tube, and exhaling into the water. It's not at 20 feet, only a few feet.
    The flow rate will not be to much loss with the 2-3 ft. talked about here and will still work well enough. Like the idea of getting wet in order to see better where to suction with the hose. You guys dredge and will know more about the details then this one.

  10. #10
    us
    Gold & Gem Prospector

    Nov 2012
    Western North Carolina
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    Thanks Guys, good info, hadn't thought about the plug ups but probably right but think there is now mostly smaller cobbles down there now so may not be too bad. I have a snorkel but this would be beyond that and as some one else mentioned here not sure it will work that deep so not sure about a extender on snorkel. Will have to experiment to see what works. Worst case, find someone with 4" and air but wanted to do it on my own if possible.
    danec71 likes this.

  11. #11

    Aug 2015
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    All Types Of Treasure Hunting
    Look for a dive shop near you to find a scuba regulator. These use two one way valves. Instead of a hose going to a tank, it can be a longer flex hose with a larger inside diameter supported above the surface by a small inner tube or, hate to say it at my age, a hemorrhoid donut. If you're not more than a few feet under water, this may be all you need. Of course your other option is use a dredge with air.

    you have options depending what your wallet can handle.

  12. #12
    us
    Oct 2017
    The Land Between Two Rivers
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    You can't use a snorkel with your head even just a foot under water.
    It isn't the air pressure in the tube, it's the water pressure against your lungs.
    Few humans have the chest muscles to get any air at all into their lungs with their head one foot under, let alone get any work done.

    Scuba mouth pieces with valves used with pressurized air actually force the air into your lungs against that water pressure and they automatically adjust to the increased pressure as you go deeper.

    It is simple to set up a hookah rig with a diaphragm compressor and scuba mouthpiece but get scuba training before you try it.

    Little things can kill you.

    Laying on the bottom of a swimming pool, breathing with a hookah rig, then simply holding your breath and standing up can put an air embolism into your blood stream and kill you, or maybe just cripple you.

    It has been a while since I was certified but I do remember that much.
    I got certified at the Y, the YMCA, when it was still separate.

    A larger corrugated tube wouldn't work better, it would collapse from the water pressure.

    Use some common sense people and stay safe.

    Good luck.
    Clay Diggins likes this.

  13. #13
    us
    Oct 2017
    The Land Between Two Rivers
    25
    13 times
    Prospecting
    Hey Buckshot,

    Sounds worth trying.

    Just put a nozzle on the end of the extension with a smaller opening, maybe a wire or bolt across it and that should stop any plugs in the pipe.

    Big rocks stuck to the end may be able to be nocked loose with your toe.

    I'm assuming you are able to work it and keep your head above water.

    Wearing a mask with snorkel would enable you to get your face in the water and see what's happening if the water is clear enough.

    Good luck.
    Buckshotnc likes this.

  14. #14
    us
    Gold & Gem Prospector

    Nov 2012
    Western North Carolina
    Fisher GBII
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    173 times
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    Quote Originally Posted by CyHawkGold View Post
    Hey Buckshot,

    Sounds worth trying.

    Just put a nozzle on the end of the extension with a smaller opening, maybe a wire or bolt across it and that should stop any plugs in the pipe.

    Big rocks stuck to the end may be able to be nocked loose with your toe.

    I'm assuming you are able to work it and keep your head above water.

    Wearing a mask with snorkel would enable you to get your face in the water and see what's happening if the water is clear enough.

    Good luck.
    Thanks Hawk, good info, think I'll try what you said first. Nothing like trial and error.

  15. #15

    Aug 2015
    561
    1118 times
    All Types Of Treasure Hunting
    We can agree to disagree. One foot, three feet, maybe five feet is not pressure that a human can not breathe at. Absolutely 10 to 20 feet, then forget my idea. I'll be doing my way this summer. If it doesn't work, I won't be back to tell you....

    Film in September...

 

 
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