Anvil 311081608 3" FNPT Galvanized Coupling Class 150 Schedule 40

3" Galvanized Pipe Coupling

This Anvil coupling joins two sections of 3-inch Schedule 40 pipe using female NPT threads on both ends. The malleable iron body is galvanized for corrosion resistance in water and air lines. It is rated for 300 psi at 150 degrees Fahrenheit. Plumbers and maintenance crews use it for straight-run connections in industrial and commercial piping systems.

Replaces damaged or leaky threaded couplings

Swap out a cracked fitting without changing the surrounding pipe when the threads match NPT and the schedule remains Class 150. The jump is worth it when the existing joint shows corrosion or weeping at the threads and a same-size galvanized replacement restores the pressure rating. Not suited for systems requiring welded joints, different thread standards, or higher pressure classes.