Brass Craft R1700R R1 1/2-Inch FIP by 3/8-Inch O.D. Comp by 1/4-Inch O.D. Comp Right Brass Craft R1700R R1 Dual Outlet Stop, Rough Brass Stop type: iron pipe or sweat inlet Riser outlet: 3/8-Inch OD (1/4-Inch nominal) Inlet: 1/2-Inch female iron pipe (angle) Right-side outlet: 1/4-Inch OD 1/4-turn on/off provides smooth operation