Plumb by Wanna {Read All Instructions Carefully Before Installing) For use with drain water only. Caution: DO NOT OVER TIGHTEN nuts or clamps. 1. Connect outer hose to air gap with clamps provided and leave other end loose. 2. Connect inlet hose to air gap and to dishwasher pump line outlet. Be sure hose does not kink. 3. Push air gap threaded neck up through hole in sink deck. Hole size should be diameter. Adjust bottom nut so that threaded end protrudes about 1" above desktop. 4.