Which tool is often employed to measure the slope of drainage pipes?

The tool commonly used to measure the slope of drainage pipes is a level. Measurement of slope is crucial in plumbing as it ensures that wastewater flows smoothly through the drainage system. When installing drainage pipes, a level helps to determine if the pipe has the correct inclination, which is typically a minimum drop of 1/8 inch per foot for proper drainage. Using a level ensures the pipe positions are not only accurate but also prevents issues such as clogging or drainage backflow that can result from improper angles.

Tape measures are primarily used for measuring lengths or distances rather than assessing angles or slopes. A square is designed for checking right angles and ensuring structural components are perpendicular, not suited for measuring slope. Calipers serve to measure the dimensions and thickness of materials, which does not apply to assessing the angle or pitch of pipes. Therefore, the level is specifically tailored to the requirement of evaluating the slope in plumbing situations.