Which of the illustrated valves is used to gain access to a hermetic system and features a Schrader core valve which is unseated by the core depressor of hose fitting when attached? GS-RA-69

Illustration GS-RA-69: the U.S. Coast Guard has not released this illustration.

Question

Which of the illustrated valves is used to gain access to a hermetic system and features a Schrader core valve which is unseated by the core depressor of hose fitting when attached? GS-RA-69

Illustration GS-RA-69: the U.S. Coast Guard has not released this illustration.

Accepted Answer

Option A: D. Access fittings incorporating spring-loaded Schrader core valves automatically unseat upon gauge hose connection, permitting secure manifold gauge attachment without venting system pressure.