Its switched automatic on when the air-pressure in the tank comes to a lower level . Other is by hand but there can be build on a circuit breaker on your type if the powercord was manual used by hand without pressure relief by switch.
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Its switched automatic on when the air-pressure in the tank comes to a lower level .
Other is by hand but there can be build on a circuit breaker on your type if the powercord was manual used by hand without pressure relief by switch.