What is the maximum distance that the Fire Department Connection (FDC) must be located after a check valve?

The correct answer is based on fire protection standards, which state that the Fire Department Connection (FDC) should be installed a specific distance from the check valve to ensure efficient operation and reliable access for firefighters. The requirement typically stipulates a maximum distance of 25 feet from the check valve to the FDC. This distance is designed to provide adequate space for both the installation of the connection and the equipment used by the fire department, as well as to help prevent any pressure loss in the system that could occur if the connection is situated too far from the check valve.

Understanding the importance of this distance is crucial in fire protection systems, as it helps to ensure that water flows efficiently during emergencies and that firefighters can quickly connect their hoses to the FDC without obstacles. Ensuring that the FDC is no closer than 25 feet helps maintain system integrity while providing the necessary access for rapid response to fire situations.