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how do I drain a Baxi 380 HT boiler

moe24moe24 Member Posts: 5
edited January 2017 in Plumbing
Hello I would like to know how to drain a Baxi 380 HT boiler so I can do repairs on the heat manifold . Or is there any web sites describing how to do so ? Any info would be helpful .


  • moe24moe24 Member Posts: 5
  • Paul48Paul48 Member Posts: 4,492
    Reminds me of an old joke....... A guy is walking down the street, and asks a cop, " how do I get to Carnegie Hall"? Cop responds, " Practice son, practice".

    On a serious note.....that would depend on how the boiler is plumbed.
  • moe24moe24 Member Posts: 5

    Here what iam looking at if this helps thanks
  • hot_rodhot_rod Member Posts: 13,850
    I think that is a combi boiler both DHW and heat?

    If so there are a bunch of connections on the bottom, no drain valve. The drain valve would need to be piped in when installed. It's possible those valves at the bottom are for draining.
    Or they could be to flush the DHW side. If you have a manual, or find one online it should define which connection is which.

    Worse case you need to shut of supply and return piping and open one of the unions below the boiler.

    Those should be gasketed connections, if you take it apart you may need a new gasket.
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    The magic is in hydronics, and hydronics is in me
  • moe24moe24 Member Posts: 5
    thank you for the info I was able to drain and refill and bleed out the system .thanks again
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