Is metal (piping and components) chemically compatible with 200 proof ethanol (ethyl alcohol)?
Some metals are chemically compatible and some are not. Copper is nonreactive and has excellent chemical compatibility. Stainless steel is also a safe material to use with 200 proof ethanol.
Brass fittings, like the ones found in the plumbing section of the local hardware store, is not recommended for use with high proof ethanol.