Universal Regulator: 4-port, two 1/4" FPT ports, and two 1/8" FPT ports (gauges sold separately here). The regulator controls the amount of air in your air compressor hose. Replace this if you're not able to adjust the PSI to your hose or if it leaks...

Pilot/unloader valve for air compressors. Replace this control valve if your unit is not cutting in and out at the required pressure. Preset for 100/130 PSI. The pilot valve is essentially the "brain" of the compressor. It controls at what PSI the unit...