Fuel feed in one line
Tank fuel + boost pressure + an open manifold/valve path = usable feed. Keep source pressure and routing logic separate.
Use this as a refresher
Place the idea inside the full system chain: source/input → control → physical response → sensing/indication → consumer/result. If the quick note seems to conflict with the aircraft in front of you, stop and confirm configuration, effectivity and current approved data.
Maintenance boundary: this is a study reminder, not a task instruction.