Anvil 8700120903, Malleable Iron Pipe Fitting, Tee, 1/2" NPT Female, Galvanized Finish Tee to connect and branch three pieces of pipe Female National Pipe Taper (NPT) threads on all three ends for connecting to male pipes Made from malleable iron for tensile strength National Pipe Taper (NPT) threads for creating tighter seals than straight threads Galvanized finish resists rust in water, air, and steam applications