The air compressor unloader valve is usually built into the pressure switch assembly, though it's sometimes found on top of the switch. Contact the air compressor manufacturer to buy a new assembly.

The air tank is an old spent fire extinguisher. The stock valve ... compressor easily handles that, filling the tank in 1 minute, 25 seconds. On the output side of the tank resides a pressure ...

In cold climates, refrigeration systems with air-cooled condensers may require extra components to prevent the low-pressure ...