EE was setting up a 6"" water pump to pump water from pit. EE was in process of setting the suction hose in the pit. When he picked up the hose and turned to place in water, he twisted his back. He saw a chiropractor on 7/6/07 and missed work 7/7. He worked full shifts 7/5 & 7/6 and sought chiro. after work. He was not scheduled 7/8 and returned 7/9 w/o restrictions.