Need more air? This 5-gallon air tank is perfect to use with train horns, air tools, kite-surfing, tire-inflating, or just about any onboard air application. The tank is rated to twice its stated working pressure and is capable of holding 300 PSI without problems. Better yet it meets all DOT specifications and is burst rated to 800 PSI. This strong steel 5-gallon air tank has seven 1/2? ports and one 3/4? port. 1/2? ports are perfect for high-flow applications like train horns. The large diameter of the ports prevents bottlenecking that you might find with smaller air tanks. There are 4 ports on the side, 1 on each end, 1 on top, and 1 on the bottom respectively. This makes it very convenient to install a drain cock and safety blow-off valve even if you mount the tank upside down.