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What is a normal pressure rise?

Ken C.
Ken C. Member Posts: 267
in THE MAIN WALL
If a hot water boiler has a pressure of 12 pounds when the water temperature is cool, how high should the pressure gage read when the water temp is around 190-200?

Comments

  • Dan Peel
    Dan Peel Member Posts: 431
    Trick question

    Each system will give you a different answer unless you plan. I'm inclined to run in the 20psi range with most of my radiant, slightly higher with cast rads @ design temps. System volume, temperature rise and expansion tank acceptance volume all contribute. Enjoy....Dan

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  • Mark R.
    Mark R. Member Posts: 40
    Mine does that

    Thanks for asking the question Ken, and thanks for the answer Dan. I have a small single story house with a single loop baseboard system and it does exactly as Dan stated. My system seldom ever gets over 170 degrees (W-M WGO-3. I had planned to ask the same question. Mark R.
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