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1/8 port on air separator used to pipe to expansion tank

streit
streit Member Posts: 4
Is it okay to use 1/8 port on top of B&G 1AS-1 as connection point to steel expansion tank on basement ceiling or should I buy next size up which has 3/4 opening on top? Thanks.

Comments

  • DanHolohan
    DanHolohan Member, Moderator, Administrator Posts: 16,513
    The 1/8th tapping is too small for that. Go with the 3/4
    Retired and loving it.
  • streit
    streit Member Posts: 4
    Okay. Thanks. Also, do I need a minimum section of straight pipe prior to air separator. Thanks. Mark
  • DanHolohan
    DanHolohan Member, Moderator, Administrator Posts: 16,513
    I don't know if B&G specifies that. Maybe someone else will pop in.
    Retired and loving it.
  • Steamhead
    Steamhead Member Posts: 16,796
    I believe that air separator needs 18" of straight pipe going in, though I can't find anything quickly online to verify this. Most air separators of this type do.

    If you don't have that, go with the EAS-1 which IMHO is a much better unit. It also lets you pipe it either in a straight (like the IAS) or angle pattern.
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
  • streit
    streit Member Posts: 4
    Thanks for the info.
  • hot_rod
    hot_rod Member Posts: 22,024
    The "old school" air purgers really don't have a place in modern hydronic systems. The do little if anything to remove micro bubbles. They are also flow and position sensitive.

    The best rule of thumb you must use them is 12 pipe diameters upstream. 18" is fine for sizes up to 1-1/2", which covers most residential stuff.

    Invest in a good micro-bubble remover, for quiet, hi-efficiency operation.
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • Steamhead
    Steamhead Member Posts: 16,796
    Here's the EAS info. I believe this would be considered a microbubble type:

    http://documentlibrary.xylemappliedwater.com/wp-content/blogs.dir/22/files/documents/2012/02/A-600A.pdf

    We like the EAS as it can be used with either a plain steel or a diaphragm-type tank.
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
  • dad173
    dad173 Member Posts: 1
    Can anyone help me I have a gas steam boiler and I didn't even turn my heat on yet but I keep losing the water in the sight glass and there are no signs of the boiler being cracked the water is just disappearing
  • Zman
    Zman Member Posts: 7,561
    @dad173
    It sounds like you have a new question about a steam boiler.
    You will get better feedback and less confusion if you repost it in strictly steam as it's own post.
    "If you can't explain it simply, you don't understand it well enough"
    Albert Einstein
    RobG