Illinois Plumbing Code Practice Exam 2025 - Free Plumbing Code Practice Questions and Study Guide

In the context of the Illinois Plumbing Code, "drainage" specifically refers to the system of piping that conveys wastewater from fixtures to a treatment system. This definition encompasses both the collection and transport functions of the drainage system, which is critical for maintaining public health and sanitation. Drainage systems are designed to carry away wastewater generated from various sources, including sinks, toilets, and industrial processes, ensuring that it is directed to appropriate treatment facilities, such as a municipal treatment plant or a private septic system.

By distinguishing drainage as a system focused on the removal of wastewater, it becomes clear how essential this function is to plumbing infrastructure. Other options, while related to water and plumbing, do not capture the specific essence of drainage; water supply systems pertain to the delivery of potable water, stormwater management involves handling rainwater runoff, and reclaimed water systems deal with the reuse of treated water. Each of these systems plays a role within broader water management, but they do not define drainage itself as outlined in the Illinois Plumbing Code.