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Where did air come from?

jeff_25
jeff_25 Member Posts: 110
in THE MAIN WALL
the water in the system is degasing a couple of good high temp runs should help

Comments

  • Dave_4
    Dave_4 Member Posts: 1,405
    Where did air come from?

    New install-conversion from gravity HW to mod-con with circs. Dec 11th-filled and bled rads. Has Taco vortech in line. Dec 18th found highest rad with one end cold and bled air. This morning found highest 2 rads with cold ends. Question: Could the hy-vent on top of vortech be "adding" air rather than removing? Rest of system closed including the CW feed valves. Never had this with the gravity-added water every 4-5 years maybe to it and it had open attic tank! Static pressure enough to fill to higher than highest rad, but could system circ cause air to suck into at Vortech?
  • JohnNY
    JohnNY Member Posts: 3,287
    Yes...

    ...conditions can certainly develop where the system pump creates a negative pressure whereby oxygen is resorbed through such things as rubber seals (flange gaskets) and air vents.

    But not likely.

    I like the first responder's post.
    Contact John "JohnNY" Cataneo, NYC Master Plumber, Lic 1784
    Consulting & Troubleshooting
    Heating in NYC or NJ.
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