Onboard Air Anatomy - Air Free
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Unless you are going to mount the pressure gauge in the cab and manually turn the system on and off, you need a pressure switch. The pressure switch is the brain of the system and this particular switch will turn the compressor on at 120psi and off at 150psi. Make sure to get a quality pressure switch. Cheap Chinese switches tend to lose accuracy from the set points, often requiring frequent replacement of switches. Spend the money the first time. View Related Article
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