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Author Topic: Boiler gauge glass replacement question  (Read 1516 times)

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Re: Boiler gauge glass replacement question
« on: February 21, 2023, 03:08:23 pm »
I've read that in 1976, Wilesco switched to the thicker 4mm sight glass.  Prior to that I read that 3mm was used.  I ordered a 3mm x 37mm watch glass for my D-32 from 1965, so I'll see if it fits.