How can drainage slope be checked during installation?

The use of a level or slope gauge is the most effective method for checking drainage slope during installation. This tool allows the plumber to accurately measure the slope of the drainage pipes, ensuring that they adhere to the required specifications for proper drainage and preventing issues such as clogs or backflow.

A level provides a precise way to assess whether the pipe is installed at the appropriate incline, typically a slope of 1/4 inch per foot for wastewater pipes. This measurement is crucial because a correct slope ensures that gravity can effectively move waste and water through the drainage system.

While measuring with a tape measure can provide basic measurements, it does not offer the same level of accuracy in determining the slope angle. Visual inspection can help identify obvious issues but lacks the precision needed for proper installation compliance. Consulting the plumbing plan is important for ensuring adherence to design specifications but does not directly verify the physical condition of the installation itself. Therefore, using a level or slope gauge stands out as the best practice for confirming drainage slope during the installation process.