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Discussion Starter · #1 ·
Does anyone happen to know what thread Accucraft uses in the backheads of its boilers? I'm talking about the one that is center above the flu -- came with a clank valve on the mogul, and plugged on the 4-4-0.

Is the threaded plug at the top of the water glass banjo on the 4-4-0 the same thread?

[FYI, I'm trying to figure out how to use that pre-existing hole both as a water feed and a steam pre-heat tap. Maybe not practical to do both though.]

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