Charlotte Pipe 4" Hub x 3" Hub Schedule 40 DWV PVC Adapter Coupling is designed to provide a reliable connection between plastic DWV pipes and plastic D & S pipes. Made from durable Schedule 40 PVC, this adapter coupling features hub-to-hub design for a secure and leak-resistant fit. It is i for use in drainage, waste, and vent systems, ensuring efficient flow and long-lasting performance in plumbing applications. Model Number: PVC 00117 0800HA