🔍 Key Concepts

• 46 CFR Subchapter T requirements for small passenger vessel fuel systems • Differences in material compatibility between gasoline and diesel fuel systems • Fire and leak risk when using soft metals vs. more robust alloys

💭 Think About

• Which fuel (gasoline or diesel) is more volatile and produces more dangerous vapors, and how does that affect material choice? • Which of these tubing/pipe materials are commonly associated with higher resistance to fire, vibration, and corrosion in fuel systems? • For gasoline systems, which materials might be considered too soft or prone to damage, even if they are allowed in other systems?

✅ Before You Answer

• Verify which material is specifically restricted for gasoline fuel lines in small passenger vessels under 46 CFR but is still permitted for diesel. • Check which options are typically considered soft copper versus stronger alloys or steel. • Confirm that the selected material is explicitly prohibited for gasoline yet allowed for diesel installations in the regulations.