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new boiler

d1961d1961 Member Posts: 2
am getting ready to replace my 94 year old boiler. i have the book the lost art of steam heating, in doing my research i have discovered i have the "dunham home heating system" as illustrated on page 252 figure 23. my current system does not have a hartford loop. (again like the illustration). my question is do i need to eliminate the 1/4" dunham air line valve which is indicated by the number 3 on illustration? and if i need to keep them are there any moving parts inside that i would need to update or replace?? as i will be adding the hartford loop upon completion.

thanks

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