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.

Question regarding Dimension B

In The Lost Art of Steam Heating, Holohan writes on page 128 that, "The only force you have to put the water back in the boiler in a gravity-return, 2-pipe system is the difference in height between the water boiler line and THE LOWEST STEAM TRAP. That's the B Dimension and you need 30 inches of vertical space for each psig of boiler pressure." Okay, I have a couple of basement radiators, so does THE LOWEST STEAM TRAP mean to include their radiator steam traps?


  • Jamie Hall
    Jamie Hall Member Posts: 23,313
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England