ASME A112.4.14 pdf download Manually Operated, Quarter-Turn Shutoff Valves for Use in Plumbing Systems 2 GENERAL CONSTRUCTION AND ASSEMBLY 2.1 General Samples for testing to this Standard shall be randomly selected from a lot ofproductionrepresentative samples. 2.2 End Connections 2.2.1 Taper Pipe Threads. Metallic taper pipe threads shall be in accordance with ASME B1.20.1. Plastic taper pipe threads shall be...