Drains: Indirect Connections An air break is a waste line or pipe from a fixture that discharges used water or liquid waste into another fixture or receptacle at a point below the flood level rim, such as the waste line from a vegetable preparation sink that drains into a floor drain.Click to see full answer. Consequently, what is the difference between an air gap and an air break?Drainage air gap. An air break provides a physical separation between the fixture indirect waste pipe and the receptor. An air break simply requires that there be no direct physical connection between the fixture indirect waste pipe and the receptor (see Figure 801.2a).Beside above, how does an air gap work? As with the faucet and the sink, an air gap separates the two hoses. If everything works properly, the dishwasher pumps waste water to the air gap where it’s moved away by the drain hose to the garbage disposal. This may remove food particles interfering with the normal water flow. Also know, is an air gap necessary? Air gaps are the most effective means of preventing your drain from cross-contaminating your dishwasher with waste. If you want to protect your dishwasher from flooding with contaminated water, you need an air gap. Dishwasher air gaps are also required by plumbing codes in many locations.What is a plumbing receptor?An indirect liquid waste receptor is a plumbing fixture designed specifically to collect and dispose of liquid waste from other plumbing fixtures, plumbing equipment or appliances which are required to discharge to the drainage system through a physical air gap or listed air gap unit.