Deep into the Water Fountains - The case of IRAS 18043−2116 A. F. Pérez-Sánchez, D. Tafoya, R. García López, W. Vlemmings and L. F. Rodríguez A&A, 601 (2017) A68 Published online: 03 May 2017 DOI: 10.1051/0004-6361/201630267