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    What Is This Tapping For? (8 Posts)

  • What Is This Tapping For?

    Customer is getting co reading of 200 ppm around this tapping at the top of an old american standard hot water boiler, he said it had a meter in it before they swapped from oil to gas. MassSave thought the CO was coming out of the hole, I think the top cleanouts on this boiler may need to be sealed with furnace cement, any thoughts?

    Thanks, Bob Gagnon
  • STEVEusaPA STEVEusaPA @ 10:07 PM
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    I think you're

    on to something. Is that a burn mark on the side of the jacket? I would at least pull the top off and look for signs of leakage. Hard to tell from pic what the tapping is for. Is it suppose to be for air vent/steel exp tank?
  • Alan Welch Alan Welch @ 10:21 PM
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    Aquastat well

    If I remember correctly, the high limit was usually mounted on top, and reverse aquastat ( or maybe operating) was mounted in coil on rear. Probably leaking between sections and and exiting thru opening. That boiler will probably last another 50 years,but a new boiler will be much more efficient.
  • Dan Holohan Dan Holohan @ 1:42 PM
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    Looks like

    it could have been for the water temperature control, Bob. 
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  • New Boiler

    Thanks Dan, the customer is going with a new boiler.

    Bob Gagnon
  • Dan Holohan Dan Holohan @ 2:36 PM
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    Wise customer

    making a grand choice! 
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    Hug your kids.
  • billtwocase billtwocase @ 7:57 PM
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    As Dan said

    Looks like the tankless coil was taken out of service, and the  control removed. That burn mark is nothing to worry about. That is an Amercan Standard Arcoliner wet base cast iron boiler. It is not efficient, and good idea to replace it, but it will outlive whatever you install in it's place.
  • billtwocase billtwocase @ 7:59 PM
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    and the CO

    probably chimney/draft problem, and the 2 doors in the front occasionally needed cement to tightly seal them.
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