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Steam Vacuum Vents

gerry gill
gerry gill Member Posts: 3,078
vent the air from the returns.

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  • Jay Zebryk
    Jay Zebryk Member Posts: 16
    Steam Vacuum Valves

    I have (2) Hoffman #6 "Vacuum" Valves located above where my returns drop into my new boiler. (See attached.) What purpose do these serve? (I also have no vents on either of my main branches.)
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