Which of the following statements about standpipe operations is incorrect?

The statement regarding flushing the standpipe immediately after attaching the inline pressure gauge is incorrect because flushing is typically not the first step in standpipe operations. The primary purpose of the inline pressure gauge is to assess the pressure available in the system. After the gauge is attached, the proper procedure is to ensure that all connections are secure and conduct a check of the system integrity before proceeding to flush water through the standpipe. Flushing is usually reserved for later steps in order to clear out any debris or water that may have accumulated, rather than being an immediate action after the gauge has been attached.

In contrast, securely connecting the hose to the standpipe and checking the hose for leaks are vital safety precautions that ensure the integrity of the firefighting equipment and prevent accidents during operation. Additionally, attaching the inline pressure gauge to the floor outlet is a critical step for monitoring the system's pressure, which allows firefighters to make informed decisions during operations. Each of these steps is essential for safety and effective firefighting procedures.