An example of a fixture or appliance that produces indirect waste only on occasion is a(n)

An example of a fixture or appliance that produces indirect waste only on occasion is a(n)

• A. Water-Heater Relief Line
• B. Dishwasher Drain
• C. Urinal Waste Line
• D. Floor Drain

Answer: (A)

Indirect waste lines are for wastes that don’t flow to the sewer during normal operation; they stay dry most of the time and only discharge when a special condition occurs. The water-heater relief line fits this: its temperature and pressure relief valve is designed to vent water only when pressures or temperatures exceed safe limits. That discharge is not part of regular use, so the line is considered indirect waste. In contrast, a dishwasher drain carries wastewater with every cycle, a urinal waste line handles ongoing sanitary waste from use, and a floor drain receives water from spills or cleaning has to flow away during normal conditions. These are regular waste paths, not occasional discharges, so they aren’t examples of indirect waste.

Indirect waste lines are for wastes that don’t flow to the sewer during normal operation; they stay dry most of the time and only discharge when a special condition occurs. The water-heater relief line fits this: its temperature and pressure relief valve is designed to vent water only when pressures or temperatures exceed safe limits. That discharge is not part of regular use, so the line is considered indirect waste.

In contrast, a dishwasher drain carries wastewater with every cycle, a urinal waste line handles ongoing sanitary waste from use, and a floor drain receives water from spills or cleaning has to flow away during normal conditions. These are regular waste paths, not occasional discharges, so they aren’t examples of indirect waste.