Under what circumstances should the curb stop be used?

The use of a curb stop is essential when there is a need to control the water supply. This device is typically installed in the water service line and allows for shutting off the water supply to a specific property without disrupting service to the surrounding area. It is particularly useful in scenarios such as a plumbing repair or maintenance work when isolating a section of the water system is necessary.

In contrast, while a pipe burst or changes in weather can prompt maintenance situations, these do not specifically call for the direct operation of the curb stop. Similarly, while issues with water pressure might affect the overall system, the curb stop is not primarily designed to manage pressure but rather to facilitate control over water flow. Thus, controlling the water supply aligns perfectly with the primary function of a curb stop, making this the correct answer.