This site contains affiliate links for which we may be compensated.
Mueller Proline 3/4" Diameter Galvanized Floor Flange Fittings$11.48
Used for hot and cold water systems refrigeration sprinklers compressed air gasoline diesel alcohol and some other applications where conducted fluid needs inner rustproof protection. Galvanized malleable iron construction with zinc coating. 150 lb class malleable fittings.
This fitting works up to 500 psi at 150f. Relative softness of metal helps provide a sure seal.