Which statement is true about the installation of water service piping?

The correct statement regarding the installation of water service piping is that it must have a working pressure of at least 160 PSI. This requirement ensures that the water service piping can withstand the pressures it will encounter during normal operation, as well as potential pressure surges. Having a minimum working pressure of 160 PSI is critical for maintaining the structural integrity of the piping and for ensuring that it can deliver water effectively throughout a building or facility without risk of failure or leaks.

This pressure standard also helps validate that the piping system can adequately serve its intended applications, such as residential or commercial water supply, where higher pressures may be necessary to facilitate adequate flow rates and pressure at various fixtures and appliances. Ensuring that the system meets these pressure specifications is vital for safety, functionality, and compliance with the International Plumbing Code.