The 6" x 6" x 4" Downspout Adapter is a PVC fitting that connects standard residential or commercial downspouts to underground 4" sewer and drain (S&D) piping. Designed to streamline rainwater flow from roof gutters into subsurface drainage systems, this solvent-weld adapter supports efficient stormwater management while helping to protect foundations and landscaping from runoff damage. Its durable construction and compact design make it a dependable solution for both new installs and retrofits.