DANCO 2.5 in. O.D. Plastic Kitchen Dishwasher Air Gap without Cap in White

The DANCO Air Gap prevents sewage from flowing back into the dishwasher. When water flows through the drain hose, it creates a suction on the water still in the dishwasher. The air gap, makes a hole for air to get in. That way, the water only leaves the dishwasher when it supposed to, when it is pumped out.California residentssee Prop 65 WARNINGSDurable plastic constructionEnsures that water flows in the right direction during the dishwasher cyclePrevents any contaminated water from entering dishwasherReplacement for deck dishwasher air gapsEasy to install with household toolsCap not included - purchase air gap cap separately