🔍 Key Concepts

• 46 CFR Subchapter T requirements for nonmetallic piping on small passenger vessels • Differences between vital systems (like fuel, fire main, bilge) and non‑vital systems • Special protection needed when piping penetrates watertight decks or bulkheads

💭 Think About

• Ask yourself: Does Subchapter T completely forbid nonmetallic piping in fuel systems, or does it allow it with specific safeguards? • Consider why the Coast Guard is concerned about nonmetallic pipe going through watertight boundaries—what must be provided at those penetration points? • Think about whether the regulation addresses only one of these issues, or if it combines more than one requirement into a single rule.

✅ Before You Answer

• Look up the exact wording in 46 CFR Subchapter T on piping materials for small passenger vessels, especially sections on fuel systems and nonmetallic piping • Verify what the regulation says must be at a watertight deck or bulkhead penetration (for example, type of fittings and valves) • Confirm whether the rule limits nonmetallic piping by location of use (vital vs. non‑vital) AND/OR by system type (e.g., fuel systems) before choosing an option that says All of the above