Waste pipe is designed to convey all of the following types of waste EXCEPT:

The waste pipe is primarily designed to convey organic materials from human waste, which includes fecal matter, urine, and associated water waste. The correct reasoning indicates that while fecal materials are indeed a part of what waste pipes handle, the specific context of the question revolves around what is typically excluded from a traditional waste pipe’s design.

Food waste is often processed in plumbing systems along with other solid wastes, particularly in systems influenced by sanitation standards and disposal regulations. Chemical waste, on the other hand, presents a significant concern for plumbing systems; it often requires specialized handling due to its potential toxicity or corrosive nature and is typically not run through standard waste pipes.

Water waste refers to wastewater that is typically directed toward sewage systems and is a primary function of waste piping. Therefore, the design of waste pipes does not conventionally accommodate chemical waste as it may require different methods of handling due to safety and environmental considerations. Hence, while waste pipes deal with fecal materials, water, and food, they do not cater to chemical waste, making this the correct distinction in the context of the question.