I am wondering if a sprinkler head must be changed out if there is only paint, due to painting of the pipe, on the threads near the pipe and not on the surfaces above?
The sprinkler head in question: Tyco 11.2k EC 155F QR
I would say no, if not on the fusible link or bulb, prefer none on the frame,
But pipe and threads should not affect the operation of the sprinkler, that is what you should look for.
OHHH I am not an engineer, so you can discount my reply if you want, and I cannot do math.
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