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Hissing and water in radiator valves

nicholas bonham-carter
nicholas bonham-carter Member Posts: 8,578
in THE MAIN WALL
do you have night setback set more than 3 degrees?

do you know what your system pressure is? should be no more than 1.5 psi [and under 16 oz. is best]

what make of air vents are installed. are your main vents in good condition?

is the water in the sight-glass dirty, and therefore surging up into the pipes?

how old is the boiler?--nbc

Comments

  • alan_8
    alan_8 Member Posts: 19
    Hissing and water in radiator valves

    Question: Why , basically in the morning from the start up, some radiators are hissing pretty bad, which then gets water in the radiator valves, which then basically hinders the heat in them later in the day (air not passing through valves with the water inside). I have a one pipe steam system. Thanks for your help.
  • alan_8
    alan_8 Member Posts: 19
    Hissing and water in radiator valves

    There are no main vents- would this be the cause of both hissing and water in valves?
  • nicholas bonham-carter
    nicholas bonham-carter Member Posts: 8,578
    need vents

    you need vents-look for plugged holes where they may once have been installed.

    don't forget my advice on pressure too!!

    other causes: lack of insulation on steam supply pipes, and dirty water, and not having a good steam reference book[available here]--nbc
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