BACK WATER VALVE DWV 4″

A DWV Backwater Valve is a protective device designed to prevent the reverse flow of wastewater into a drainage system. Installed within DWV (Drain, Waste, and Vent) piping, it automatically closes when backflow occurs, helping to protect buildings from sewage backups and flooding. Manufactured from durable, corrosion-resistant materials, it provides reliable performance and long-term protection for residential, commercial, and industrial drainage systems.