Possible Clues:

• Pipe from water-main in street to which hose may be attached
• Terribly dry in county shortly requiring water source
• Discharge pipe for drawing water from the mains
• Water source
• That sort of hose is certainly over one foot long
• Water point for firefighters
• Outlet from water main for connecting to hoses
• Hot worker getting awfully dry inside? Supplier of water needed
• Try hand at turning on water main connection
• Outlet from water main (for firefighters etc)