Pipe Wrench

A pipe wrench is a heavy-duty hand tool designed to grip round or hexagonal pipe and fittings. The lower jaw is fixed and serrated; the upper jaw slides on a worn screw, allowing adjustment to different pipe diameters. The hook jaw at the head lets you apply torque without the wrench slipping off.

In the field, a pipe wrench is your go-to for breaking loose or tightening threaded connections—galvanized, black iron, brass, and steel pipe. Always grip near the nut or fitting, not high on the handle, to avoid over-torquing and stripping threads. Never use it on chrome-plated or polished fittings; the jaws will scar them. The serrated teeth grip hard and will mar soft metals and plastic.

Size matters: a 10-inch wrench handles most residential work, but carry an 8-inch for tight spaces and a 14-inch or 18-inch for larger diameter pipe or stubborn connections. Keep the adjustment screw clean and lightly oiled so the jaw moves smoothly. It's not a substitute for a basin wrench, strap wrench, or adjustable wrench—use the right tool for the material and the space.