Viair 275C, 280C, 325C, 350C, 380C, 400C, 425C, 444C & 450C Air compressors. Equivalent to Viair part number: 92831. Hand tighten Check valve on Tank side (Male End only), Use 12-14 LBS Torque, If Torque wrench is not available then just hand tight and then give it 1 -1.5 turns.
