When can I pump water from the fire hydrant?

The fire hydrant is a test fire hydrant button on the roof. Within 5 minutes, the hydrant pump will automatically start supplying water.

The spray pump starts the hydraulic alarm, the pressure switch automatically turns on and the fire pump automatically starts within 5 minutes after the end water testing device is started. Fire hydrant pumps and spray pumps, first of all, are fire engines, which can be manually started directly from the fire engines when they are automatic. During the test, check whether all valves are open to avoid unnecessary troubles.