What is the name of the point at which impounded liquid will overflow a fixture or receptacle?

• A. Flood Level
• B. Overflow Point
• C. Backflow Rim
• D. Spill Rim

Answer: (A)

Flood level is the highest water level inside a fixture at which water will begin to spill over. It marks the limit beyond which the liquid cannot be safely contained, triggering the overflow path to carry excess water away into the waste system. This concept is a standard way to describe when impounded liquid will overflow, and it’s used to design and evaluate fixtures so they won’t overflow under normal use. The other terms describe parts or concepts related to overflow in a looser way (such as the rim where water could spill or an invented term that isn’t the conventional label for the fill limit), but they don’t identify the point at which overflow begins as clearly as “flood level.”