Vent and drain lines.

CFR · 2024-01-01 · US · Title 14

All vent and drain lines and their fittings, that are located in a designated fire zone must, if they carry flammable fluids or gases, comply with § 121.259, if the Administrator finds that the rupture or breakage of any vent or drain line may result in a fire hazard.

official document · source cfr-2024 · id 14:§ 121.261