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(888) 312-8812 Login SignupIf you’re dealing with air loss in different brake circuits, the Mack Air Brake Pressure Protection Valve is the part that helps organize your system’s priorities. This valve protects lower-pressure circuits from pulling down the air supply to keep the most important systems pressurized when the tanks dip. It’s meant to route airflow in a way that maintains consistent protection levels, based on tank and circuit thresholds. Found in many truck models, the Mack 25165589 offers a reliable switching point for air when the pressure drops or fluctuates between functions.
| Brand | Part Number |
|---|---|
| PAI | LPR3712 |
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