A 3-inch DWV long sweep comb tee is a plumbing fitting used in drainage, waste, and vent (DWV) systems. It features a T-shaped design with a long sweep for smoother flow, minimizing clogs. The 3-inch size allows for easy connection to pipes, making it ideal for both residential and commercial plumbing applications. This fitting efficiently directs wastewater while maintaining proper drainage and venting.