Vacuum Sensing Valves Automatic and Mechanical Sensing Valves Model No.: ASV14 Valve Part Number d Diameter in. (mm) D1 Top & Bottom Thread L1 Length in. (mm) L2 Length in. (mm) Hex Size in. (mm) Level Compensator Suspensions ASV14 0.16 (4) G 1/4″ 0.33 (8.5) 1.50 (38) 0.67 (17)