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

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

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

Answer: (B)

An indirect waste pipe is used for waste that does not discharge directly into the building’s drainage stack. Instead, it releases into an approved open receptor (an open connection to the drainage system) such as a sink or interceptor, typically with an air gap or trap to prevent backflow and contamination. This setup ensures the waste flow is isolated from the main drainage path until it passes through the receptor, providing backflow protection. The other options don’t fit this concept: a direct waste pipe carries waste straight into the drainage system without an open receptor; a vent pipe is for venting air from the drainage system rather than carrying waste; a soil pipe carries fecal matter from toilets and connects to the main soil stack.

An indirect waste pipe is used for waste that does not discharge directly into the building’s drainage stack. Instead, it releases into an approved open receptor (an open connection to the drainage system) such as a sink or interceptor, typically with an air gap or trap to prevent backflow and contamination. This setup ensures the waste flow is isolated from the main drainage path until it passes through the receptor, providing backflow protection.

The other options don’t fit this concept: a direct waste pipe carries waste straight into the drainage system without an open receptor; a vent pipe is for venting air from the drainage system rather than carrying waste; a soil pipe carries fecal matter from toilets and connects to the main soil stack.