Model DL Rev B Pressure Reducing Regulator For General Service; 1-1/2" Line Size; Ductile Iron Body And Spring Chamber; S1 Trim: 316 Stainless Steel Metal Seat With 302 Stainless Steel Diaphragm; NPT Threaded End Connections; 30-80 PSIG Range Spring; Polyethylene Vented Spring Chamber Plug