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Boiler automatic air vent replacement

  • 18-09-2023 10:29pm
    #1
    coolarama
    Registered Users, Registered Users 2 Posts: 9 ✭


    Hi,

    The automatic air vent at the back of my boiler is leaking so I'm thinking of replacing it myself. As you can see the bend it connects to is rusty so I've ordered one of those as well, which is cast iron. I'm afraid it could difficult to get off or maybe I'd damage the pipe. Any advice for this job?

    Thanks

    IMG_20230826_185800.jpg




Comments

  • #2
    dathi
    Registered Users, Registered Users 2 Posts: 1,422 ✭✭✭dathi


    you will need to drain down the boiler before you start and you need ptfe tape to wrap around the treads i would just replace the brass air vent



  • #3
    10-10-20
    Registered Users, Registered Users 2 Posts: 8,069 ✭✭✭10-10-20


    I'd hit it with WD40 now and let it sit for a while.



  • #4
    coolarama
    Registered Users, Registered Users 2 Posts: 9 ✭coolarama


    Thanks for the advice, much appreciated. I'll hopefully give it a go next week.

    I can't find any valves for draining. Would draining via a radiator be the best way?



  • #5
    Lenar3556
    Registered Users, Registered Users 2 Posts: 1,711 ✭✭✭Lenar3556


    If it were me;

    Turn off any automatic filling valve, (or supply to expansion tank in the case of an open vented system)

    Get a bucket and towels under air vent. Use a pair of grips and a spanner to loosen air vent without doing damage to gun barrel pipe fitting.

    loosen it a little and allow any major pressure to release. Then screw it out and put the new one already prepared with PTFE in straight away.

    Quick, and reduces the risk of air locks and problems restoring circulation associated with a full drain down.



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