What does a pressure gauge check within a plumbing system?

A pressure gauge is an essential instrument in a plumbing system used to measure the water pressure within that system. This pressure is crucial because it helps ensure that the plumbing operates effectively and efficiently. Maintaining appropriate water pressure is key to delivering water where it is needed, such as in faucets, showers, and appliances.

By monitoring the pressure, a plumber can identify potential problems, such as leaks or clogs, that could affect system performance. Too high or too low pressure can lead to issues ranging from pipe bursts to insufficient water flow, making the pressure gauge a vital tool for maintaining the integrity and functionality of the plumbing system.

The other options—temperature of the water, water quality levels, and volume of water in the tank—are not functions of a pressure gauge. Instead, they would require different types of instruments or testing methods for accurate assessment.