In a plumbing system, which part of the tank tee requires a shut-off valve?

The outlet of a tank tee is where the water flows out of the tank and into the plumbing system. A shut-off valve at this location is important because it allows for the control of water flow to various fixtures or systems that rely on that water supply. This feature is crucial for maintenance, repairs, or emergencies; it permits the plumber or homeowner to stop the water flow without needing to shut off the entire water supply to the tank or the house. This way, plumbing work can be performed safely and efficiently without disrupting the entire system.

While the inlet, bottom, and side portions of the tank tee play important roles in the overall functionality of the plumbing system, they typically do not require a shut-off valve in the same way the outlet does. The inlet usually serves as the entry point for water into the tank and may have a valve located further upstream, while the bottom and side outlets may be designed for drainage or secondary flow paths and generally do not necessitate immediate cutoff capabilities. Thus, positioning a shut-off valve at the outlet is a standard practice that enhances convenience and safety in plumbing operations.