The Charlotte Pipe 4 in. x 3 in. Schedule 40 PVC DWV Coupling is a durable plumbing fitting used to connect and transition between 4-inch and 3-inch drain, waste, and vent pipes. It provides a secure, leak-resistant reduction for gravity-flow drainage systems in residential and commercial plumbing applications.

• Made from strong Schedule 40 PVC for long-lasting durability
• Designed for drain, waste, and vent (DWV) non-pressure systems
• Reduces pipe size from 4 in. to 3 in. for system transitions