What is the requirement for valves installed away from the fixture they serve?

Valves installed away from the fixture they serve must be labeled to ensure proper identification and clarity about their function and the specific fixture they control. Labeling these valves is crucial for maintenance, troubleshooting, and safety reasons. It enables plumbers and technicians to quickly ascertain which valve corresponds to which fixture, thereby avoiding confusion during repairs or emergencies. Proper labeling is also essential for compliance with plumbing codes and regulations, which often mandate that valves be clearly identified to facilitate efficient plumbing management. This practice contributes to safer working conditions and helps prevent accidental shutdowns or disturbances to the water supply system.