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Anyone ever heard of a Hoffman no.10 vent?

emaydeoh
emaydeoh Member Posts: 57
in Strictly Steam
C08F5216-D0D8-411F-80C2-2B01D2DAB09E.jpeg

I ordered a Hoffman no.40 vent on Amazon, had good reviews. Recieved what looks a lot like a no.40, but the embossed label on it says "Hoffman no.10". Are these the same thing?

Comments

  • 109A_5
    109A_5 Member Posts: 1,686

    Hello @emaydeoh,

    The #10 in the chart below is a Main Vent (Old). I suspect the vent you have is either labeled wrong (a Blem) or possiblly Hoffman decided to reuse the number or it is counterfeit.

    image.png

    https://heatinghelp.com/assets/documents/Balancing-Steam-Systems-Using-a-Vent-Capacity-Chart-1.pdf

    National - U.S. Gas Boiler 45+ Years Old
    Steam 300 SQ. FT. - EDR 347
    One Pipe System
  • Steamhead
    Steamhead Member Posts: 17,387

    It's a #40. You got what you paid for.

    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
    Mad Dog_2
  • DanHolohan
    DanHolohan Member, Moderator, Administrator Posts: 16,601
    edited March 2023

    Does it have a tongue? That's the small metal piece that hangs out of the screw connector.

    Retired and loving it.
  • Mad Dog_2
    Mad Dog_2 Member Posts: 7,519

    I like the #40 Hoffman is a Tried and true company. When I did my steam Vapor system from scratch in Early 2000s I asked Dan what the finest brand of radiator service valve was..."HOFFMAN!" So true...23 yrs that shout off , hold and turn like new...you can easily tell the difference in quality. Mad

    Consulting by Mad Dog & Matt Jr.
  • Mad Dog_2
    Mad Dog_2 Member Posts: 7,519
    20230325_060859.jpg
    20230325_060902.jpg

    Consulting by Mad Dog & Matt Jr.
  • leonz
    leonz Member Posts: 1,339

    It looks exactly like the vents my inlaws had on their whole house radiators.

    Mother inlaw said if you wanted to turn the heat off you rotated the vent upside down if I remember right-mind you I could be wrong about that too.

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