Stainless Steel Adapter, 1/2-14 Male NPT To 3/4-16 Male JIC 37 deg Flare, 90 deg Elbow

That's exactly the kind of situation this fitting handles. One end is 1/2-14 male NPT, which threads into standard pipe thread ports, and the other end is 3/4-16 male JIC with a 37-degree flare seat. The 90-degree elbow body lets you redirect your line without needing extra fittings or a long run of hose to make the turn. Being stainless steel, it holds up well where corrosion is a concern. SSP Fittings Corp manufactures it under part number J8-8ME, so sourcing replacements or matching fittings is straightforward.