1. Connact the two flanges (3) into the two inlets (5) . Screw them tightly. 2.Connect the body (1) to the flanges remember the gaskets (2) inside. The two flanges (3) ars adjustable Inlets. Unscrew the hexagon nut (4) on the flange (3) , rotate the flange) to the right the distance and screw the hexagon thread back tightly. You can adjust the distance from 7 3/4 te8 1/4". 3.