* the gate of the fountain.
   The gate leading either to the fountain of Siloam, on the east
   of the city, or to that of Gihon, on the west.

  3:15  2Ki 18:17  20:20  2Ch 32:30 
 * the king's pool.
   Probably the aqueduct made by Hezekiah to bring the waters of
   Gihon to the city of David.