In the story, the character's main advantage was a hidden device, specifically an emergency shutoff valve located discreetly in the corner. This pipe served as the key element of his strategy or plan, providing a critical opportunity or safety measure during a tense situation.
The presence of this valve symbolized a crucial "ace in the hole," giving him a backup plan or a means to control a dangerous or unpredictable scenario. It highlights the importance of having a strategic advantage in moments of crisis, which can be decisive in the unfolding events.