Extra leisure battery

Discussion in 'Tech/Mech General' started by Petros, Jun 1, 2016.

  1. Petros

    Petros Funster

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    I am about to fit an extra leisure battery to my Pilote motorhome and would like to know what the piece of plastic tubing does that is attached to the existing one. It is obviously some sort of drain/overflow but where would it be vented to? Would i need to fix the same sort of tubing to the new battery.
     
  2. hilldweller

    hilldweller Funster Life Member

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    It's a vent to go outside the vehicle. Get rid of hazardous gasses.

    If new battery does not have one it must be a sealed one.
     
  3. Stealaway

    Stealaway Funster

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    If the new battery does have a vent hole in the side you'll need to Tee in to the existing one.
     
  4. maxi77

    maxi77 Funster

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    I am not sure if they really help, the gas given off is Hydrogen, the lightest of gases and the pipes go down not up. One suspects if the pipes fit properly they will become full of the very gas you are trying to get rid of.
     
  5. Speve

    Speve Funster

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    I suppose as they become full it will trickle out of the end but still leave the pipe full
     
  6. Petros

    Petros Funster

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    Thank you, very helpful
     
  7. Jaws

    Jaws Funster Life Member

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    It is not to get rid of the gas as such.. merely somewhere for excess gas to vent to out side the hab area
    And as the battery cools any gas in the pipe will be sucked back in to the chamber :)
    Fully sealed batteries have an expansion chamber build in.. A bit like a collapsed balloon
    Gas goes in to it and is then drawn back in to the main body
     
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  8. maxi77

    maxi77 Funster

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    Perhaps, but as hydrogen is a very small molecule the seal has to be very effective to keep it in at all, does a bit of lose fit polythene fit the bill
     
  9. Jaws

    Jaws Funster Life Member

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    If it is a loose fit it is not correctly fitted..
    A correctly fitted vent pipe does the job just fine HD is not exactly a porous substance !
     
  10. tonyidle

    tonyidle Funster

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    Carried along with the vented gases, if the battery is undergoing a high charge rate, is very acidic water vapour . That stuff is most definitely better out of the van than in.
     
  11. Jaws

    Jaws Funster Life Member

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    You aint wrong there Tony !!!
     
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