A waste pipe that discharges into and through an approved open connection is called what?

A waste pipe that discharges into and through an approved open connection is called what?

• A. Direct Waste Pipe
• B. Indirect Waste Pipe
• C. Vent Pipe
• D. Soil Pipe

Answer: (B)

Think about how waste from fixtures reaches the drainage system. Indirect waste piping is used when the discharge doesn’t go straight into the drainage line but enters an approved open connection or receptor (often with an air gap) first. This setup means the wastewater is directed into a receptacle or trap chamber before joining the building’s drain, which helps prevent backflow and contamination. That description—waste entering through an approved open connection before the drainage system—fits an indirect waste pipe. In contrast, a direct waste pipe carries waste straight into the drainage system without going through a receptor, a vent pipe is used for venting rather than carrying waste, and a soil pipe handles waste from toilets, not the general indirect-waste scenario.

Think about how waste from fixtures reaches the drainage system. Indirect waste piping is used when the discharge doesn’t go straight into the drainage line but enters an approved open connection or receptor (often with an air gap) first. This setup means the wastewater is directed into a receptacle or trap chamber before joining the building’s drain, which helps prevent backflow and contamination.

That description—waste entering through an approved open connection before the drainage system—fits an indirect waste pipe. In contrast, a direct waste pipe carries waste straight into the drainage system without going through a receptor, a vent pipe is used for venting rather than carrying waste, and a soil pipe handles waste from toilets, not the general indirect-waste scenario.