Where is a shutoff valve typically installed on a water tank by code?

The correct placement of a shutoff valve on a water tank is on the cold (inlet) side, which is where the water enters the tank. By installing the shutoff valve here, it allows for easy access to stop the flow of water into the tank for maintenance or replacement without draining the entire system. This location is particularly important for ensuring the safe operation of the water heating system and facilitates repairs or inspections on the tank itself.

Positioning the valve on the cold side ensures that the user can control the incoming water supply without affecting the heated water already in the tank. It also complies with plumbing codes that often specify such installations for optimal safety and functionality, making it easier for maintenance personnel to operate the system safely.