Any idea`s...

Discussion in 'Motorhome Chat' started by old-mo, Apr 2, 2014.

  1. old-mo

    old-mo Funster Extra Special Life Member

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    Whilst having the service done on motor yesterday,,,, I asked them to do a few checks etc...

    One of these was,,, when I open the gas locker,,, there is a faint whiff of gas... :Eek!:

    By all accounts on one of the gas-lo refillable bottles is a very slight leak at the top of the bottle...

    No mention of nipping it up.... only we can drain it down and put you new bottle on...

    By all accounts who ever fitted the gas-lo system,,,, used PTF tape..... which so they said should not have been used.. :Sad:

    Now do I need a new bottle or can it be nipped up a bit or drain and use the correct thread sealer...

    Or is there another way of putting some thing round the Very, Very small leak.. ?
     
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  2. Ber090

    Ber090 Funster Life Member

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    Hi Mo, I would think that removal of ptfe tape and a clean up and inspection of threads and then refit would solve it. Use leak detector (or washing up liquid) to check for any leak.
    Cheers
    Bernie.:thumb:
     
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  3. trophychap

    trophychap Funster

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    It should be possible to nip it up a bit, we had the same thing on one of our bottles I just nipped I up a bit more it was OK then.

    Gaslow do use PTFE tape on most of the bottles I have seen, it is for gas connections though. Its thicker tape than for water pipes.

    Mine went less than a quarter turn when I did it.

    Pete
     
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  4. scotjimland

    scotjimland Funster Life Member

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    Hi Mo

    agree with previous post (Bernie's) .. but don't use anything abrasive on the joint faces... they depend on a scratch free surface to make a gas tight seal.

    as an aside..

    PTEF tape used correctly and for the proper job is good stuff .. but it can be a curse..

    It caused problems on the North Sea oil and gas platform I worked on.. one particular incident I remember was a tiny piece went down an air supply line and blocked a jet in a pneumatic level instrument.. it was subsequently banned..
     
    Last edited: Apr 2, 2014
  5. Chris

    Chris Funster Life Member

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    Tip - Stub your fag out before opening the gas locker:thumb:
     
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  6. chaser

    chaser Funster

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    I am under the impression, might well be wrong, that ptfe tape on a yellow reel is for gas joints it seems to be slightly thicker than the other.
    On the gasit bottles the gas outlet side is already done so don't need any, but when I did mine and had a leak on the filler side I used some and it's been fine but as it is only under pressure when you fill it can't leak any other time.
    Incidently why are you not supposed to use it? Gasit have it in their shop so must be there if you want it.:thumb:
     
  7. scotjimland

    scotjimland Funster Life Member

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    That depends on the type of joint..

    If it is a taper thread joint then PTFE is used to both lubricate the thread and provide a gas tight seal..

    If it is a surface to surface joint , as have on a propane regulator then it isn't used.. nor is it used with pipe fittings that use olives for the seal.

    As I said earlier.. used indiscriminately and without understanding why it is being used... it can be dangerous..

    that is why we have qualified and certified gas fitters.
     
    Last edited: Apr 2, 2014
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  8. tonyidle

    tonyidle Funster

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    It is yellow, it's designed for gas, and only one turn of it should be employed. Only certain types of joint require it and as far as I remember there aren't any on the Gaslow system. Just tighten the joint up.
     
  9. Road Runner

    Road Runner Read Only Funster

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    But then he wont be able to test whether he has cured the leak nor not
     
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  10. chaser

    chaser Funster

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    Thanks , that's ok then that's where I have used it but ask again , why are you not supposed to use it, does it degrade or react to the gas or what
     
  11. Road Runner

    Road Runner Read Only Funster

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    double posting deleted
     
    Last edited: Apr 2, 2014
  12. TheBig1

    TheBig1 Funster Life Member

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    inspect which part is actually leaking first. although very uncommon cylinders do very very rarely develop leaks from welded collars. in this case it would be safer to replace it. even if you could find somebody that would weld it, it wouldn't be safe. unlike a motorbike petrol tank, the contents is constantly under high pressure so will find any weak point

    if its just a manual joint, then try tightening it first. if this doesnt work, drain the tank (use it up) then dismantle the joint clean it up and remake the joint with calortight or lpg safe ptfe
     
  13. bernardfeay

    bernardfeay Read Only Funster

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    I think I would be tempted to find a different service agent who might choose a much less expensive option.
     
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  14. scotjimland

    scotjimland Funster Life Member

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    it won't react with LPG ..the danger is if used where it is not supposed to be used,

    ie face to face joints where the thread has absolutely nothing to do with the seal.. then the joint may leak.. that is the danger..also, .. small bits that may break off can migrate and go places you really don't want them to be.. like in the jet of your fridge. ... not a killer.. but very inconvenient.
     
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