Air Brake Condensate

NW Mailing List nw-mailing-list at
Mon Dec 28 08:30:49 EST 2020

A friend of mine asked me in the winter how did the railroads keep air
brake condensation from freezing the triple valves especially during the
steam era.  I did not have an answer nor did I ever think about it.  Is/was
this a problem?

Sam Holben
Virginian Rail Fan
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