SAIT 2nd Year Plumbing Practice Exam 2025 – Complete Study Resource

The maximum fixture load on a 2" pipe with a toilet is established based on plumbing codes and standards that outline how many fixture units (FU's) can be effectively serviced by pipes of various sizes. A 2" pipe is commonly used in drainage systems, and understanding its capacity is crucial for ensuring proper flow and preventing clogs.

For a 2" pipe, the typical calculation indicates that it can handle up to 24 fixture units. This figure is essential when designing plumbing systems, as it helps determine how many fixtures, such as toilets, sinks, and showers, can be connected without exceeding the pipe’s capacity. Exceeding the maximum load can lead to inadequate drainage and increased risk of backups.

The number 24 is derived from standardized plumbing guidelines that account for the flow rates and the physical dimensions of the pipe, ensuring that the system operates effectively under normal use conditions. This maximum load supports efficient waste removal while maintaining sufficient velocity to prevent sediment buildup and clogs.

Other options do not align with accepted standards for a 2" pipe, as they either exceed its practical capacity or do not represent typical scenarios in plumbing design. The established maximum of 24 fixture units for a 2" pipe serves as a guideline for plumbers when