The fixture unit value for a 1 1/2" waste pipe is?

The fixture unit value for a 1 1/2" waste pipe is 2 fixture units. This measurement is crucial for plumbing systems as it helps determine the capacity of the waste system to handle the total anticipated load from various fixtures. A fixture unit is a standardized measure used to assess the probable demand on the plumbing system over time.

For a 1 1/2" waste pipe, the value of 2 fixture units signifies that this size of the pipe can effectively manage the flow from a limited number of fixtures simultaneously. This is particularly relevant for residential plumbing where bathrooms that depend on smaller waste lines, such as sinks and lavatories, fall under this category. The standards set by plumbing codes ensure that the pipes can handle peak demands without blockage or overflow, which is essential for maintaining proper drainage and a sanitary environment.