The OPW 71SO CARB/EVR-Certified Vapor-Tight Overfill Prevention Valve from OPW Fueling Components allows the liquid from a product spill in tight-fill, gravity-drop applications to be drained directly into the drop tube, thereby isolating the drain valve from the tank ullage and eliminating a common leak point. Part I of this installation video lists the components that must installed with the 71SO, the tools needed for installation, the proper way to determine tank volume, knowing where to cut the drop tube and preparation of the polypak seal before installation.
