Transition from 3 in. X 4 in. downspout to 4 in. Sewer and Drain (S&D) pipe with the National Diversified Sales 9P06 3" x 4" x 4" White PVC Downspout Adapter. This adapter connects directly to drain pipe to convey downspout flows into the drainage system. The Downspout Adapter is made of polyvinyl chloride (PVC) and makes a Downspout X Hub connection. Meets applicable ASTM standards. For use in non-pressurized underground sewer and drainage applications; maximum working pressure of 5 psi. Hassle-free limited lifetime warranty guarantees the NDS product is free from defects—or we’ll replace it.