Unibody air maintenance device for a dry fire protection system

A system comprising:

• a dry fire protection system configured to distribute water to a coverage area;
• a pressurized gas source configured to supply a pressurized gas to the dry fire protection system;
• a pressurized gas supply line configured to supply the pressurized gas from the pressurized gas source to the dry fire protection system;
• and
• a unibody air maintenance device fluidly coupled to the pressurized gas supply line, the unibody air maintenance device comprising:
• a body that is a single, integral component, the body having an inlet and an outlet, the inlet being configured to receive the pressurized gas from the pressurized gas source and the outlet being configured to direct the pressurized gas to the dry fire protection system;
• a regulator disposed within the body and downstream of the inlet, the regulator being configured to maintain a pressure of the pressurized gas through the unibody air maintenance device at a set pressure;
• a check valve disposed within the body and downstream of the regulator, the check valve being configured to open to allow the pressurized gas to flow from the inlet towards the outlet and to close to prevent the pressurized gas from flowing from the outlet towards the inlet;
• and
• a three-way valve disposed within the body downstream of the inlet and upstream of the regulator, the three-way valve being configured to allow the pressurized gas to flow towards the regulator in a regulate position and to prevent the pressurized gas from flowing through the unibody air maintenance device in an off position.