What do indirect waste pipes typically discharge into?

Indirect waste pipes are designed to convey waste water indirectly and must discharge into a waste receptor. A waste receptor is a fixture or device that receives wastewater and allows it to flow into the drainage system, preventing contaminant backflow and cross-connection with potable water sources. This method of discharge is integral to maintaining sanitation and preventing the spread of contaminants.

Indirect waste systems are often utilized for specific applications, such as laboratory sinks, ice machines, and other fixtures where waste can contain harmful materials or require special handling. Instead of directly discharging into the sewer system, these waste materials are allowed to flow into a receptor, which is designed to handle such waste safely.

The other options suggest discharge points that do not conform to the standards and practices outlined in plumbing codes. For example, while a storage tank and treatment facility might handle water and waste, they are not the typical points for indirect waste discharge. Public sewer systems are intended for direct wastewater discharge, not through indirect means, highlighting the need for proper waste receptor utilization in plumbing design.