What is the maximum drainage fixture unit capacity of a 4 inch drain pipe with a slope of 1/4 inch per foot?

The maximum drainage fixture unit capacity of a 4 inch drain pipe with a slope of 1/4 inch per foot is identified as 216 DFU based on plumbing codes that outline the relationship between pipe diameter, slope, and the capacity to handle drainage.

A 4 inch drain pipe is capable of accommodating a significant volume of waste due to its larger cross-sectional area compared to smaller diameter pipes. The slope of 1/4 inch per foot is optimal for maintaining proper flow rates and preventing clogging, which is critical in drainage systems. This slope allows for efficient movement of wastewater, thus enabling the pipe to handle more drainage fixture units effectively.

According to standard plumbing practices, the capacity for a single 4 inch drain pipe is set at 216 DFU under adequate conditions, which signifies the maximum number of drainage fixtures that can be connected without exceeding the pipe's flow capacity. This adherence to specific standards ensures that the plumbing system functions efficiently and complies with safety regulations.