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Discuss Smell from the boiler after tank was filled in the Oil and Solid Fuel Forum area at

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  1. Btolsta

    Btolsta New Member

    evening everyone,

    First time poster here. Have always had oil heating but this is a first for me. Moved into a new house 3 months ago with a Camray 5 oil boiler installed on it. Not one issue with it. I filled my tank this week (there was still 150 litre left in it) and since then there is a smell of oil from round the boiler. I have checked and round the burner is dry, no drops etc. I took out a drawer beside the boiler and the smell seems to be coming from this pipe. Any pointers as what that pipe is and what could be causing the smell?

    Thabks in advance.

  2. Best

    Best Trusted Plumber Top Contributor!!

    The smell might be strong from that area, but it definitely can't be from that pipe. That looks like a flow pipe with a manual vent and a cheap relief valve connected to it. I note the lock nut on the relief valve hasn't been correctly locked against the relief nut. None of this matters as that is a heating water pipe and not oil.
    You need to get a oil engineer to check it all around the oil pipe and oil hose and associated valves.
    Even slight amount of Kerosine will create very strong smell indoors. If you think there is an oil leak, then turn valve off at oil tank.
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  3. Robert Tyrrell

    Robert Tyrrell GSR

    Check all the joints on the pipework from the oil tank to the boiler.
    I had a call to a boiler that I had serviced some weeks previously for the same reason and, after taking 30 minutes to find the problem, I noted that there were no inserts in the oil line at a joint behind the boiler. This was the cause of the leak as the pipe was distorted within the joint. Nothing to do with me servicing the boiler. It was just coincidence that it happened and I pointed out to the customer that the rest of the pipework needs checking, just in case.
    All oil pipework should, imho, be made with flared joints but at the very least, and insert should be used if using compression joints.
    It only takes the slightest drip of oil to make a very strong smell so be diligent in your search, and good luck :)
  4. Btolsta

    Btolsta New Member

    That's exactly what it was. Just a small nut that needed tightening. It was time to service the boiler and the engineer found it when replacing the nozzle. Thanks for all the suggestions.
  5. WHPES

    WHPES Trusted Plumber GSR

    Personally I think compression fittings on oil lines should be banned and only flared allowed. 9 times out of 10, oily smells in houses seem to be from compression fittings.
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