Underground drainage fittings are specialized connectors and components used in subterranean drainage systems to join pipes, redirect flow, and ensure a secure and efficient passage of wastewater, stormwater, or other liquids. These fittings, made from durable materials such as PVC, clay, or metal, include couplers, bends, junctions, reducers, and inspection chambers. They are essential for creating leak-proof and adaptable drainage networks that can handle various flow rates and conditions, contributing to the overall reliability and effectiveness of underground drainage systems.