Definition
In a hydraulic system, a central distribution block that receives high-pressure fluid from the pump and routes it to the various subsystems and selector valves that need it. The pressure manifold is the common point where pressurized hydraulic fluid is collected and then directed to wherever the pilot or system commands it to go.
Plain English
A junction block where pressurized hydraulic fluid arrives from the pump and is then sent out to whichever part of the aircraft is calling for it, such as the landing gear, flaps, or brakes.
Context Anchor
Seen in aircraft hydraulic system diagrams, maintenance manuals, and troubleshooting procedures for systems that use fluid pressure to move or hold aircraft parts.
Derivation
Manifold comes from Old English meaning 'many folds' or 'many in number.' In mechanical systems it has long meant a single fitting or chamber with many openings, allowing one input to feed many outputs (or many inputs to feed one output). The word fits because the manifold is one block serving many subsystems.
Why Pilots Care
If the pressure manifold or its connections fail, multiple hydraulic subsystems can lose pressure at once because they all draw from the same distribution point. Understanding this helps a pilot or technician trace why several unrelated systems might fail together.
Analogy
Think of the manifold as the main water distribution block in a house: one pipe brings pressurized water in, and several smaller pipes branch out to the kitchen, bathroom, and laundry.
Intuition Check
Do not read “manifold” here as an engine intake manifold. In this term, it means a shared hydraulic distribution fitting, and “pressure” means the fluid is being delivered with force.
Example Sentence 1
When the technician traced the loss of brake and gear pressure to a single source, he inspected the pressure manifold first.
Example Sentence 2
Pressurized fluid flows from the reservoir through the pump and into the pressure manifold before reaching the landing gear actuators.