how do i seal a powerhead cable

Discussion in 'General Discussions and Advice' started by toppdogg, 19 Nov 2009.

  1. toppdogg

    toppdogg

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    hey guys just a quick question
    i have a power head that has a join in the cable want to use it on new tank to create circulation at the bottom of the tank and the join will be submersed in water
    so my question is how can i seal it that it doesn't get wet and shock the shiiat out of me?
     
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  3. jacquesb

    jacquesb Retired Moderator

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    Not 100% sure of this - but, you can try completely encasing the joint in silicone - or perhaps use a waterproof joiner?
     
  4. toppdogg

    toppdogg Thread Starter

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    jacques where can i get a waterproof casing from do you perhaps know
    i was also thinking of using heat shrink do think that will work?
     
  5. jacquesb

    jacquesb Retired Moderator

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    Heat shrink will most probably work TopDogg, IF you seperate the 2 wires - do not try and enclose both wires in it.

    Most electrical shops should sell waterproof housings for wiring - BUT, it might be a bit too bulky.

    Perhaps use heat shrink and over the heatshrink use marine silicone?
     
  6. Nemos Janitor

    Nemos Janitor

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    @toppdogg please reconsider doing a patch job on a pump cable. In trying to save a few rand it could end up costing a life and a capable homicide charge. It really is not worth it.
     
  7. toppdogg

    toppdogg Thread Starter

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    thanks guys will go and get W/proof housing and do it the proper way
     
  8. Stressed Eric

    Stressed Eric

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    I'm with NJ on this, rather go buy a sunsun powerhead for next to nothing instead. I know a good waterproof joint can be done, but it takes a lot of experience to get it right, and then it's still a gamble.
     
  9. Zookeeper

    Zookeeper

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    Most hardware stores around here in Cape Town sell little kits to make waterproof joints.Its a simple plastic tube which covers the connection.The tube is then filled with epoxy glue .Simple, cheap and no way you can go wrong.
     
  10. mnd123

    mnd123

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    I reckon you could get a pump for the same price as the casing - dont take a chance, get a new pump
     
  11. davidfr7

    davidfr7

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    extend o cord mini resin cable joint. comes with a tube in the tube you get a connection block. it has a resin that you mix and 10 min later it is rock hard and water proof. I use it on cables under water. Very neat and small. Sells for -+ 60 South African Rands
     
  12. dallasg

    dallasg Moderator MASA Contributor

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    i agree with davidfr7, i have used these for underwater applications in dive setups etc, i think they call it scotch plugs
     
  13. toppdogg

    toppdogg Thread Starter

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    shot guys for info will look in to it :)
     
  14. magman

    magman

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    a sun sun is like R300, to buy parts to seal will cost R100, that's only R200 for a new pump, you may aswell gooi in the wifes hair dryer, it will be a lot quicker and less painful. Have you watched the film "The Green Mile".
     
  15. RiaanP

    RiaanP Moderator

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    You get those watertight seals. I mean they use it in boreholes!!! It works, waterproof and will last forever (or until borehole runs dry)

    Same stuff they use to seal and redo your house mainline power cable coming off the grid. There is moisture in the ground, and these joints last forever. Else you have to dig up your paving.

    You get different sizes for different cable thickness (obviously dude - speaking to myself)
     
  16. toppdogg

    toppdogg Thread Starter

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    thanks riaan
    will go and get one dont want to take chances
     
  17. dv8

    dv8

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    i have made my own joint for my main pump, all i did was cut a piece of hose, placed the joint part of the cable inside the pipe and then filled it with silicone. worked perfectly. now don't get me wrong as no1 should ever take a chance with electricity, but all our houses here in south africa should have an earth leakage in the main bourd of your house.
     
  18. aslam

    aslam

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    Hello Topdogg,I would get a new pump.Dont chance it.
     
  19. Hill

    Hill

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    And most pumps you purchase don't have earth leakage wires. So no earth leakage is going to help.

    Most earth leakages trip between 20 and 30mA. 10mA is more than enough to kill you.

    Also remember salt water is way more conductive than fresh water and way more harsh on most materials.

    I have used an amalgamating rubber tape to seal a joint in my water change pump. But it would only stay submerged in the sea for about an half hour. Never heard any of the surfers complaining.
     
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