To maintain an ideal grip with a pipe wrench, what gap must be kept between the hook jaw and the workpiece?

Maintaining an ideal grip with a pipe wrench requires that there be no gap between the hook jaw and the workpiece. When the hook jaw is in direct contact with the pipe, it maximizes the grip and allows the wrench to effectively transmit the torque needed to loosen or tighten fittings. This direct contact ensures that the teeth of the jaw can engage fully with the surface of the pipe, preventing slipping and enabling the user to apply maximum force without damaging the pipe or the tool.

Having a gap, regardless of its size, could lead to a less secure grip, increasing the chance of slipping and making it difficult to apply the necessary torque. This could result in inefficient work and potential damage to the pipe or fittings. Therefore, ensuring there is no gap is essential for effective operation and safety in pipe fitting tasks.