Trunk main意思

"Trunk main" is a term used in plumbing and piping systems to refer to the primary or main pipeline that supplies water or other fluids to a building or a larger system. The trunk main is typically the largest diameter pipe in the system and serves as the central distribution point for smaller branch lines that carry the fluid to various parts of the building or system.

In plumbing, the trunk main is often the main water supply line that enters a building from the street or a well and then branches out to supply water to different parts of the building, such as bathrooms, kitchens, and laundry rooms. The trunk main is usually made of durable materials like copper, steel, or more recently, plastic (PVC or CPVC), depending on the system's design and the regulations in the area where it is installed.

In larger systems, such as those found in industrial settings or municipal water systems, trunk mains can be very large in diameter and may carry water over long distances before branching into smaller lines that serve specific areas or buildings. These trunk mains are critical infrastructure that ensures a continuous supply of water for various purposes, including drinking, sanitation, fire suppression, and industrial processes.