Polylok PDB-DS06 6" Down Spout Adapter for 3" x 4" Down Spouts - This down spout adapter transitions water from down spout to drain pipe. The adapter allows 3" x 4" down spouts to transition to 6" pipe. It is made made of heavy duty polypropylene with UV inhibitors to prevent fading and cracking. Use with the Polylok Flow Gate (sold separately) to discharge water at a point of release.