The Riyadh Water Operation and Maintenance Program operates and maintains about 161 different deep wells for treatment and distribution of potable water as per international applications. This study sums up the problems and our experience in solving them. There are also some recommendations to be followed in similar cases. In fact, this study is a real experience recorded for many years. As the wells are of different depth and water quality there are also different types of pumps used in them. The pumps are selected and installed as per the Saudi Ministry of Agriculture recommendations besides taking into account pump characteristics, i.e. total head, HP, (Powl Power) hydraulic thrust, etc.