mjr6550 Posted June 13, 2015 Report Share Posted June 13, 2015 I come across steam heat occasionally (more often when I was doing mostly home inspections). I have not seen too many of these. Click to Enlarge 27.78 KB Click to Enlarge 28.83 KB Click to Enlarge 45.54 KB Click to Enlarge 28.42 KB Click to Enlarge 36.82 KB Click to Enlarge 18.48 KB Link to comment Share on other sites More sharing options...
Neal Lewis Posted June 13, 2015 Report Share Posted June 13, 2015 The book The Lost Art of Steam Heating by Dan Holohan is a must read if you inspect steam systems. Link to comment Share on other sites More sharing options...
Bill Kibbel Posted June 13, 2015 Report Share Posted June 13, 2015 I still see vapor/vacuum systems in some commercial, apartment buildings and gild. age mansions. The folks that service the equipment or replace the boilers don't have a clue what it is and completely screw it up. Link to comment Share on other sites More sharing options...
John Kogel Posted June 13, 2015 Report Share Posted June 13, 2015 What is a typical pressure for a system that age? Link to comment Share on other sites More sharing options...
kurt Posted June 13, 2015 Report Share Posted June 13, 2015 When my one pipe system is cranking in the middle of winter, it might hit 1.5 psi. Not sure about vapor vacuum types. Link to comment Share on other sites More sharing options...
Bill Kibbel Posted June 14, 2015 Report Share Posted June 14, 2015 When the vapor system in the OP pictures still worked, it operated at about 8 ounces. Other vapor systems, anywhere from 1 to 11 ounces. Vacuum systems operate below atmospheric pressure and it is usually measured in inches of vacuum. Link to comment Share on other sites More sharing options...
mjr6550 Posted June 14, 2015 Author Report Share Posted June 14, 2015 Bill is in the correct range for vapor systems. I had read 1 to 14 ounces. I just looked on the background information for this system. The manufacturer said anywhere from about 0 to 4-5 ounces was normal. The sight glass goes up to 14 ounces. https://ia601603.us.archive.org/12/item ... a51101.pdf Link to comment Share on other sites More sharing options...
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