What is the term for the pressure measured at the residual hydrant during flow readings?

The correct term for the pressure measured at the residual hydrant during flow readings is known as residual pressure. This measurement is crucial in understanding the available water supply from a hydrant when it is being used to fight a fire.

Residual pressure reflects the pressure remaining in the system once water is flowing; it indicates how much pressure is available to supply additional flows and how effectively a hydrant can provide water under operational conditions. This is particularly important for firefighters to ensure adequate water supply and to plan their operations effectively.

Static pressure, on the other hand, is the pressure in the system when no water is flowing, while hydraulic pressure is a broader term that may refer to pressure in a fluid system but isn't specific to hydrants or flow readings. Residential pressure is not a standard term related to firefighting, adding further confusion. Understanding the correct terminology is essential for effective communication and operation within fire service activities.