Red Seal Plumbing Practice Exam 2025 – Comprehensive All-In-One Guide for Exam Success!

In this context, the gravity system is the correct answer, as it relies primarily on the force of gravity to supply water. Typically, in a gravity system, water is stored in elevated tanks or cisterns, and as such, the pressure at various outlets decreases as the height of the floors increases. This may result in inadequate water pressure, particularly for upper floors in a building, because the pressure available depends on the vertical distance between the water source and the outlet.

For upper floors, the elevation can significantly impact water pressure; the greater the height, the lower the pressure due to gravitational effects. This phenomenon is considered in plumbing design, as buildings often install pump systems or pressure-boosting systems to ensure that upper floors receive adequate water pressure.

In comparison, other systems like forced, pumped, or pressurized systems actively use mechanical means to enhance water flow and pressure throughout a plumbing system, making them more reliable in delivering water to higher elevations effectively.