IMAGE DISTRIBUTED FOR MTU AMERICA INC. - In this image released on Monday, Sept. 28 2015, an MTU Series 2000 engine is lowered into the basement to bring the system's technology up to date. Pump Station #1 of San Francisco's Auxiliary Water Supply System (AWSS), housed in the San Francisco Fire Department's Headquarters includes process gauges and valves that date back to the building's original construction in the early 1900s. (Peter Barreras/AP Images for MTU America Inc.)