Premium PP Dash Control Valve with knob, engineered for 25–35 PSI pop pressure; designed for precise air brake control in heavy-duty commercial vehicle systems. Features 1/4" NPT inlet and outlet ports with 1.5-inch mount hole spacing; ensures simple replacement and compatibility with standard dash panel layouts. Includes rugged high-quality components for long-lasting durability; suitable for heavy-duty trucks, buses, and vocational equipment with NPT-threaded air brake valves. Direct replacement for Haldex KN20031, Velvac 034055, Meritor RKN20031, Tectran 14421, Mack 8235-RKN20031, and many more industry-standard part numbers. Backed by World American's commitment to quality and reliability; ideal for maintaining DOT-compliant, high-performance air brake functionality.