What is typically the first step before working on a plumbing system?

Shutting off the water supply is a critical first step before working on any plumbing system to ensure safety and prevent water damage. By turning off the water supply, it protects both the worker and the environment from potential leaks, flooding, or spillage that could occur during the repair or installation process. This action avoids creating hazardous conditions like slipping on water or dealing with unwanted spray or flow from the system.

In addition to safety, shutting off the water supply allows for a clear and dry work area, making the plumbing tasks more manageable and reducing the risk of mistakes or incomplete work. Once the water is off, the plumber can confidently consult plumbing codes, gather materials, or measure pipe lengths without the concern of active water flow. This proactive step is essential for maintaining a controlled and safe working environment in plumbing projects.