2 Gal. 120 psi 12-Volt Fast-Fill Air Source KitVIAIR 120 psi Air Source Kits come with a low amp draw, 25% duty cycle, 275 degreeC VIAIR compressor mounted on a 150 psi rated 1. 5 Gal. air tanks with 5 ports. All Air Source kits come with a pre wired pressure switch (P N 20003 90 120 psi). The 120 psi Air Source Kit comes complete with a 1 4 in. NPT brass drains cock, 1 4 in. NPT ASME coded and certified safety valve, 1 2 in. NPT port compression fitting for 3 8 in. airline pre installed. To use,