Spc. Joshua Preston (right), a motor transport operator and an Arcanum, Ohio, native, and Sgt. 1st Class Matthew Thomas, a water purification specialist and a Dayton, Ohio, native, both with the 512th Quartermaster Company, 13th Combat Sustainment Support Battalion, 3rd Sustainment Brigade, 103rd Sustainment Command (Expeditionary), attach a water hose to a 3,000-gallon per hour reverse osmosis water purification machine July 16 in an effort to repair the pump at Joint Base Balad, Iraq.