Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

Gauge glass condensation

Good morning,

I replaced my gauge glass this weekend and have a couple of questions after the fact.  Prior to replacement I was not getting any condensation forming in the glass above the water line.  Now I do have some condensation, although it does not appear to be increasing in volume over time.  The water in the glass looks very clean and the water level jumps only about 1/4"+/- during steaming.  Will this condensation disappear with time or is the water dirty and I need to do something else?  The replacement glass is thicker than the original.  Is this an issue?

Thank you.


  • Steamhead
    Steamhead Member Posts: 16,719
    Should be OK

    but keep an eye on it, for the other things you mentioned. 
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
  • ToddB
    ToddB Posts: 75
    One more question

    Thank you.

    From what I have read I should have replaced the rubber washers at the ends of the gauge glass.  I found that on my setup the rubber washers are set inside the bonnet nuts and they did not match the size of the washers that came with the glass replacement kit.  My setup does not have brass washers.  Tightening the nuts seats the rubber washers against the threaded part of the valves - the washers do not come in contact with the glass.  Are the rubber washers typically set in the nuts?  I was able to hand tighten the nuts and then use a wrench to snug tighten them, hopefully not too much. 
This discussion has been closed.