What is a NPT fitting?

A NPT fitting, or National Pipe Thread fitting, is a type of threaded connector used in plumbing and fluid systems primarily in the United States. It follows the National Pipe Thread standards (ANSI/ASME B1.20.1), characterized by tapered threads. The tapering of the threads creates a seal as they tighten, which helps prevent leaks and ensures a secure connection. NPT fittings are available in various sizes and configurations, making them suitable for joining pipes, valves, and other components in fluid systems. The standardized threading promotes compatibility and reliability, enabling effective fluid transport and containment within the system.