Pipe dope on my temperature sending unit. Is this okay?

slantsixdan said

Dryseal threads are not quite the same thing as NPT. Related, similar, compatible, but not the same.

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Who said anything about dryseal threads? I don't care if it's a water pipe or a natural gas line. NPT gets some thread sealant or dope pending the liquid involved, just like the temperature sender gets going into a cast water pump housing.