Manifold (fluid mechanics)

A manifold is a wider and/or larger pipe or channel, into which smaller pipes or channels lead, or a pipe fitting or similar device that connects multiple inputs or outputs for fluids.

Engineering
Types of manifolds in engineering include:
 * Exhaust manifold
 * An engine part that collects the exhaust gases from multiple cylinders into one pipe. Also known as headers.


 * Hydraulic manifold
 * A component used to regulate fluid flow in a hydraulic system, thus controlling the transfer of power between actuators and pumps


 * Inlet manifold (or "intake manifold")
 * An engine part that supplies the air or fuel/air mixture to the cylinders


 * Scuba manifold
 * In a scuba set, connects two or more diving cylinders


 * Vacuum gas manifold
 * An apparatus used in chemistry to manipulate gases

Also, many dredge pipe pieces.

Biology
In biology manifolds are found in:
 * Cardiovascular system (blood vessel manifolds, etc.)
 * Lymphatic system
 * Respiratory system

Other fields
Manifolds are used in:
 * HVAC
 * Pipe organ
 * Plumbing