Collection: Semi-Truck Relay Valves

Relay Valves are essential to achieving fast, consistent air delivery in heavy-duty brake systems. These valves significantly reduce brake lag by relaying brake pedal commands directly to the brake chambers, especially on long wheelbase vehicles like trucks, trailers, and buses. Designed for quick application and release of air pressure, Relay Valves enhance braking performance, reduce stopping distances, and improve overall safety.

At MaxiTrucks, our selection includes service relay valves, quick-release valves, and double check valves, all engineered to meet or exceed OEM specifications. Built with durable, corrosion-resistant materials and precision internal mechanisms, each valve is optimized for consistent function under pressure — mile after mile.