A branch pipe is a secondary pipe that connects to a main pipeline, allowing fluid, gas, or other media to be distributed or diverted to another location or system. It is typically connected using fittings such as tees, wyes, or saddles, and may include valves to control the flow through the branch. Branch pipes are essential in plumbing, industrial piping, HVAC systems, and fire protection networks, where multiple distribution points are needed. They can vary in diameter based on the required flow rate and are made from materials like steel, copper, PVC, or PEX.