Section 02.03.03.680 - GOOSENECK PIPE LOOP, DOWNHILL AND OVER-A-HILL01.Location. Will be located in the main water line downstream of the irrigation water pump. (3-15-22)02.Position. The bottom side of the pipe at the loop apex will be at least twenty-four (24) inches above the highest sprinkler or other type of water emitting device on the highest part of the field. (3-15-22)03.Pipe Loop. The loop will contain either a vacuum relief or combination air and vacuum relief valve at the apex of the pipe loop, and if the water pump is portable and the apex is a straight, horizontal section of pipe, the pipe will be level. (3-15-22)04.Location of Chemical Injection Port. The chemical injection port will be located downstream of the apex of the pipe loop and at least six (6) inches below the bottom side of the pipe at the loop apex. (3-15-22)05.Use Restriction. Is not to be allowed when pumping from a groundwater source. (3-15-22)Idaho Admin. Code r. 02.03.03.680