Drainage Products Drainage Products 4″ Black Perforated Drain Pipe 4″ Black Solid Drain Pipe 4″ Black Perforated Drain Pipe with Filter 4″ PVC Perforated Drain Pipe 4″ PVC Solid Drain Pipe 6″ PVC Drain Pipe 4″ and 6″ PVC Parts 4″ Black Corrugated Parts