Tap and brackish water purification systems from Severn Trent Services (UAT Div.), of Torrance, Calif., are found in almost every type of environment from military duty, bottling plants and pre-school facilities. Systems can be customized. Tap water reaching the system can be processed in several configurations from a simple basic RO system to a fully loaded one. Offerings include a standard Tap Pro/Basic, Tap Pro/Plus as well as options that can be added to any of the RO systems.