Compressed Air

Compressed air, also known as High-Pressure Air (HPA), is the standard propellant used in modern tournament and recreational paintball. Stored at high pressures commonly 3000 psi in aluminum tanks or 4500 psi in carbon-fiber wrapped tanks compressed air is regulated down to safe operating levels for the marker.

Markers rely on consistent pressure delivery to maintain stable velocity, predictable trajectories, and efficient air consumption. Unlike CO₂, compressed air remains stable across varying temperatures and does not experience phase shifts, making it the preferred choice for high-performance platforms.

A two-stage regulation system is typical: the tank regulator reduces pressure to an intermediate level (such as 450–850 psi depending on output type), while the marker’s internal regulator further controls operating pressure. High-end markers often operate at extremely low pressures between 120–180 psi.

Air quality is a key factor. Contaminants such as oil, moisture, or debris can degrade regulator internals, cause velocity spikes, or lead to premature O-ring wear. Fields maintain fill stations with filters designed to supply clean air, and players regularly service regulator components to maintain consistency.

Compressed air tanks require periodic hydrostatic testing, typically every five years, to ensure structural integrity. Failure to maintain testing compliance can result in leaks, regulator failures, or catastrophic tank rupture, making proper maintenance essential.