Ensure your semi truck is Ready for the Road Ahead™ with enhanced control of its fluid systems, with the Wabco 3/4" NPT ECAS Modulator Valve. Due to its ability to regulate the flow and direction of fluids, this replacement valve is the ideal option to maintain optimal pressure and fluid levels. Manufactured with a robust design to provide accurate and reliable performance. FleetPride is your First Click in Heavy Duty®.