Forney 75549 Tank Manifold for Air Compressors, 1/2-Inch-Male NPT Inlet, 1/4-Inch Male NPT Outlet Air compressor manifold with male NPT inlet and female NPT outlet Gauge port is female NPT Pressure switch mount is 1/4-Inch NPT Safety valve: 25-150 PSI Suitable for compressors up to 3 HP