21QB211BP4
Air Brake Manifold Control Valve
Mack

This control valve is a key component in the air brake system, responsible for regulating compressed air flow to various brake chambers. Its precise operation ensures balanced and effective braking performance across all wheels, which is critical for safety during heavy-duty hauling. The valve’s durable construction resists wear from high-pressure operation and environmental factors, providing long-lasting reliability. Proper adjustment and maintenance of this valve are essential for consistent brake response and compliance with safety standards. It plays a vital role in preventing brake imbalance and ensuring smooth vehicle stops. Source One Parts Center supplies this control valve as a high-quality replacement to support your truck’s braking system in demanding conditions.