Rhode Island Journeyman Plumber Practice Exam 2026 - Free Journeyman Plumber Practice Questions and Study Guide

The regulation concerning the disposal of combustible liquids down public sewers is strictly enforced to protect public health and the environment. These liquids can pose serious risks, including causing blockages in the sewer system, creating hazardous conditions during waste treatment processes, and potentially contaminating the water supply.

The correct answer indicates that these substances should never be permitted to enter the public sewer system. This is in alignment with environmental regulations and best practices regarding waste disposal. By prohibiting the entry of combustible liquids into sewers, municipalities aim to ensure a safe and effective waste management system that protects both the infrastructure and the surrounding ecosystem.

This regulation takes precedence over potential exceptions that might apply to different types of waste, emphasizing the importance of stringent controls on hazardous materials.